Informal geological society (RSG SG&T)

фЕЛФПОЙЮЕУЛПЕ ПВЭЕУФЧП тПУУЙЙ

тхуулпсъщюобс йуумедпчбфемшулбс зтхррб
рп уфтхлфхтопк зепмпзйй й фелфпойле
лПОЖЕТЕОГЙЙ, УЕНЙОБТЩ, УПЧЕЭБОЙС

2001 [СОЧБТШ] [ЖЕЧТБМШ] [НБТФ] [БРТЕМШ] [НБК] [ЙАОШ] [ЙАМШ] [БЧЗХУФ] [УЕОФСВТШ] [ПЛФСВТШ] [ОПСВТШ] [ДЕЛБВТШ]
2002 [СОЧБТШ] [ЖЕЧТБМШ] [НБТФ] [БРТЕМШ] [НБК] [ЙАОШ] [ЙАМШ] [БЧЗХУФ] [УЕОФСВТШ] [ПЛФСВТШ] [ОПСВТШ] [ДЕЛБВТШ]
2003 [СОЧБТШ] [ЖЕЧТБМШ] [НБТФ] [БРТЕМШ] [НБК] [ЙАОШ] [ЙАМШ] [БЧЗХУФ] [УЕОФСВТШ] [ПЛФСВТШ] [ОПСВТШ] [ДЕЛБВТШ]

сОЧБТШ, 2001

жЕЧТБМШ, 2001

нБТФ, 2001

NE GSA, Burlington, Vermont, USA
March, 12-14, 2001
Deformation, Metamorphism, and Melting: Interactions in the Crust
рПДБЮБ ФЕЪЙУПЧ - 5 ДЕЛБВТС 2000 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://www.geosociety.org/sectdiv/northe/01nemtg.htm
The convenors of this session invite those interested in physical and chemical evolution of the continental crust to contribute papers based on recent results. Theoretical, field and experimental studies are all welcome, and we encourage those in particular who are working in areas of current interest in the community, such as the rheology of the partially-molten crust, the geochemical and mechanical effects of melt in the crust, and mechanisms of melt segregation, extraction, ascent and emplacement.
XXVI General Assembly of the European Geophysical Society (EGS) meeting, Nice, France
March, 26 - 30, 2001
Continental deformation and earthquakes
рПДБЮБ ФЕЪЙУПЧ - ДП 1 ДЕЛБВТС 2000 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://www.copernicus.org/EGS/egsga/nice01/nice01.htm
The aim of this session is to bring together papers that address continental deformation and seismic hazards within the continents in general. We welcome studies that address deformation at the lithospheric scale to the scale of studies of individual faults. Studies that incorporate GPS, InSAR, and other geodetic observations to make inferences about the kinematics and dynamics of deformation are welcome. Papers that provide insights into the dynamics of postseismic deformation from observational and theoretical studies are also encouraged.

бРТЕМШ, 2001

1-К НПМПДЕЦОБС ЛПОЖЕТЕОГЙС, РПУЧСЭЕООБС 90-МЕФЙА УП ДОС ТПЦДЕОЙС БЛБДЕНЙЛБ б.м.сОЫЙОБ "уПЧТЕНЕООЩЕ ЧПРТПУЩ ЗЕПФЕЛФПОЙЛЙ" ", нПУЛЧБ, фпт, йм тбо,
3-5 БРТЕМС 2001 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: ЙОЖПТНБГЙПООЩЕ РЙУШНБ, ГЙТЛХМСТЩ, РТПЗТБННБ
XIX чУЕТПУУЙКУЛБС НПМПДЕЦОБС ЛПОЖЕТЕОГЙС "уФТПЕОЙЕ МЙФПУЖЕТЩ Й ЗЕПДЙОБНЙЛБ", йТЛХФУЛ, йъл уп тбо,
23-28 БРТЕМС 2001 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: ЙОЖПТНБГЙПООЩЕ РЙУШНБ, ГЙТЛХМСТЩ, РТПЗТБННБ, ФЕЪЙУЩ
European Union of Geosciences Meeting (EUGXI), Strasbourg at the Palais de la Musique et des Congres
April, 8 - 12, 2001
рПДБЮБ ФЕЪЙУПЧ - ДП 1 ДЕЛБВТС 2000 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС:http://eost.u-strasbg.fr/EUG
уЕЛГЙЙ (ЧЩВПТПЮОБС ЙОЖПТНБГЙС):
- Rifted Continental Margins
  - E1: The causes and consequences of uplift at continental margins
    All continental margins experience denudation, and this is in response to either tectonic uplift, changes in drainage systems of both. This denudation occurs at different rates in different settings and provides a primary source for sediment and geochemical recycling in the Earth. The aim of this session is to discuss a range of issues, from the geodynamic causes of uplift, such as mantle convection processes, tectonic unloading and underplating through to the geomorphological controls on denudation and sediment transport to basins. Contributions are invited on any relevant area to promote interdisciplinary discussion
  - E3: Contrasting processes of continental rift and passive margin development: comparison of results from the modern oceans and orogenic belts
    The aims of this session are to examine the structure of the continent-ocean boundary zone (COB) at rifted margins and the processes responsible for its formation. Understanding the significance of the COB is necessarily multidisciplinary and requires the integration of petrology, geochemistry, structural geology, seismology, stratigraphy, geomagnetism, and numerical modelling. Contributions addressing the structure, formation and significance of the continent-ocean boundary zone at both non-volcanic and volcanic margins are invited describing observations, process modelling, and synthesis. Key questions include: Is mantle exhumation within the COB at non-volcanic margins a typical or atypical process? What is the duration of the transition from intra-continental rifting to mature sea floor spreading? What is the time development of melt generation during rift margin formation? Is there a predictable change in the geochemistry and petrology of rift melts as break-up is approached? Does depth dependent lithosphere stretching occur at all rifted margins as break-up is approached? What is the relationship between the formation of the COB at rifted margins and ocean ridge processes, sensu stricto? Do mantle exhumation at slow ocean ridges and rifted margins have a similar origin? How widespread is mantle serpentinisation and is this process important in generating uplift (buoyancy) across the COB? How important are detachments (in the sense of normal shear surfaces)? How is the rheology of lower and crustal rocks and the lithospheric mantle modified as break-up is approached? Are buoyancy forces important in rifted margin formation? What controls the thickness and distribution of seaward-dipping reflectors and what is their relationship with the COB?
  - E7:Tectonics and sedimentation associated with Arctic margins
- Mantle Structure, Composition and Dynamics
  - F1: Geochemistry, structure, and dynamics of the Earth
    The geochemistry of Earth's mantle is characterised by small and large-scale heterogeneities. Seismological studies render an increasingly more detailed picture of the interior of the Earth, while numerical models provide an insight into the fluid dynamic control on the length and timescale of mixing. At present, however, there are many inconsistencies between the interpretation of the geochemical data, the geophysical observations and numerical models of mantle convection. This inter-disciplinary symposium aims to bring together geochemists, geophysicists, mineral physicists and geodynamicists to discuss the formation, preservation, lengthscale and temporal evolution of chemical heterogeneities in the Earth's mantle.
  - F2: Subduction zone processes in active and fossil convergent orogens
    Subduction zone processes, whether they be chemical recycling through the subduction factory, vertical motions caused by slab breakoff, or the exhumation of high and ultrahigh pressure rocks (to mention but a few), play a significant role in the geodynamic development of convergent orogens. Contributions to this symposium that focus on subduction zone processes recorded in active and fossil convergent orogens, or from modelling these processes, are welcome from all fields of earth science
  - F7: Sub-continental mantle plumes: origin, evolution, surface expression and fate; What do we really know?
    This inter-disciplinary symposium, co-sponsored by the ILP, aims to bring together geoscientists interested in the origin, evolution, surface expression and fate of mantle plumes which impinge upon the base of the continental lithosphere. These may range in size from the large-scale plume heads inferred to trigger continental flood basalt provinces to smaller wavelength convective instabilities such as those imaged by seismic tomography beneath the Tertiary-Quaternary volcanic regions of Europe. The continental lithosphere preserves a much longer record of such plume events than the oceanic lithosphere, potentially providing constraints on the changing pattern of mantle convection through the past 3.5 Ga.
  - F8: Mantle convection and lithosphere deformation
    Beyond the simplistic view of rigid plates as driven passively by laminarly rolling mantle convective cells there is a wide spectrum of phenomena commonly observed by geoscientists. Rheology and deformation patterns of the lithosphere, intrinsic lithospheric instabilities, magmatic and metamorphic events feed back, and are influenced by, mantle dynamics. Traditionally, lithospheric processes were considered too complicated to be modelled directly, which justified "observational" and "pre-described" approaches. The explosive growth of enormous data sets and computational power has created an exciting opportunity for direct numerical simulation (DNS) of the coupled lithosphere-mantle system. This session is intended for both modellers planning DNS projects and specialists concerned with the observational and experimental constraints on mantle-lithospheric coupling.
  - F9: Upper mantle structure and flow
    Upper mantle structure and deformation has become an outstanding issue in the understanding of plate behaviour, interaction between plates and the deeper convective mantle, and related processes. This symposium aims to bring together complementary approaches necessary to better understand the dynamics of the deep Earth. We would welcome presentations on large-scale geophysical observations (e.g. seismic tomography, anisotropy, receiver functions), as well as smaller scale mineral physics and microstructural studies. In particular, contributions on numerical modelling from crystal deformation to global mantle flow are strongly encouraged.
  - F10: From dynamics to defects: the behaviour, properties and structure of the mantle and core
    With advances in high P/T experiments and in the simulations of both the fluid dynamics of convection in the Earth's interior and of the atomistic properties of Earth-forming materials, the time is now approaching when we will be able to describe and link both the microscopic and the mega-scale behaviour of the Earth's core and mantle. This symposium is aimed at bringing together computational and experimental mineral physicists, fluid dynamicists and solid Earth geophysicists in order to address the outstanding problems in developing a total description of the physics, chemistry and evolution of the Earth's interior.
- Lithosphere Structure and Tectonics
  - G1: Earthquake deformation and related surface processes
    Recent earthquakes (Turkey, Taiwan, California) have highlighted the importance of surface processes in the understanding of long term as well as transient earthquake deformation. The use of modern space and terrestrial techniques (InSAR, GPS, high-resolution DEM, geophysical imaging, and 2D-3D trenching) are critical for the study of active zones. This session concentrates on recent earthquake deformation and the development of earthquake related structures and aims at combining knowledge from different disciplines such as palaeoseismology, geomorphology, geodesy, and geophysics. Special emphasis is put on the interpretation of relevant field and space-born data as well as modelling of earthquake deformation. Contributions should provide analyses that may have implications for seismic hazard assessment.
  - G2: Structure, composition and accretion of the oceanic crust: geophysical, petrological and geochemical constraints
    The objective of this session is to promote comparison of observational and theoretical constraints on oceanic crustal genesis and evolution, with the aim of reaching a better understanding of the processes that create and shape the seafloor. This session will bring together results from recent studies on seafloor magmatic, tectonic, and hydrothermal processes. Papers describing all facets of these studies are encouraged, including results from seismic experiments, high-resolution mapping, submersible investigations, dredging, drilling, theoretical studies, and field studies in ophiolites. The session will focus on processes of crustal accretion at spreading ridges (e.g., melt transport, mode of emplacement and crystallisation of magmatic rocks), and on along-axis variability of hydrothermal processes and in the composition and structure of oceanic crust.
  - G3: Integrated tectonic studies of the evolution of the Tethyan orogenic belt in the eastern Mediterranean region
    дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://eost.u-strasbg.fr/EUG/
    This session will act as a forum for discussion of new insights into the Mesozoic to Recent evolution of this critical segment of the Alpine-Himalayan chain. Papers which integrate two or more of the following will be especially welcomed: field-based geological studies; seismologic/tomographic data; seismic surveying; geodetic studies; palaeomagnetic evidence; other geophysical evidence (e.g. gravity, magnetics); numerical/analogue modelling; geochemical evidence; new radiometric and stratigraphic age constraints.
  - G4: Crustal architecture of intraplate strike-slip deformation belts and their link with transform faulting<br> Intraplate strike-slip deformation belts are common tectonic features, particularly at convergent plate boundaries, where they are produced by both oblique convergence and continental indentation. These crustal-scale structures, that also occur in other geodynamic environments such as passive margins, are characterised by complex structural architecture, by the occurrence of large earthquakes, and by the fast uplift of localised crustal sectors. Intraplate strike-slip belts can also control the ascent and emplacement of deeply-soured magma. In some cases, intraplate strike-slip belts link with oceanic fracture zones and transform faults, transferring transform shear from the ridges to the interior of the plates. This evidence has an important impact on the classical concept of transform fault. The symposium welcomes all contributions at various scales and from different approaches (structural geology, seismicity, exposure timing, laboratory and numerical experiments, etc.) on the structural architecture of intraplate strike-slip deformation belts, their control on magma ascent and emplacement, on the location of large intraplate earthquake and ground effects, and on their possible link with transform shearing.
  - G5: The dynamics of basin inversion: observations and numerical modelling
    Inverted basins are enigmatic structures, which have attracted the attention of geoscientists for decades. Numerical rheological models of the process have been put forward, which relate the inversion process to the occurrence of differential shortening of localised areas in the crust and upper mantle. This provides a link between inversion zones and the rheological properties and dynamic evolution of the continental lithosphere. These models, which include both deep lithospheric processes and surface processes, can be tested against detailed geological and geophysical observations comprising stratigraphy (timing), extent of shortening (strain pattern and history), amount of erosion, crustal structure, thermal structure, and gravity. We believe that such a session addressing the multidisciplinary problem of unravelling the nature of basin inversion will be valuable at this time in the development of this subject.
  - G6: Blueschist to UHP metamorphism and back again
    High -pressure metamorphic rocks record conditions at destructive plate boundaries. Due to the intertwining roles of reaction on kinetics and fluids, these rocks commonly retain records of parts of their pre- and post-peak metamorphic histories. This allows inferences about the processes at plate boundaries. Many studies of high-pressures rocks are actively being conducted in Europe in connection with broader studies of the Caledonian and Alpine Orogenies. Examples of new discoveries in Norway include occurrences of micro-diamonds and majoritic garnet. Many of these studies incorporate geochronology, which further enhance our knowledge of dynamics of processes, that operate at destructive plate margins.
  - G7: Origin and significance of major boundaries in the deep crust and continental lithosphere
    Significant progress has recently been made in understanding the evolution of the upper continental lithosphere, especially in terms of surface processes, tectonic burial, exhumation and the delineation of first order tectonic boundaries - including terrain-bounding faults and suture zones. In contrast the geometry, origin and evolution of deep boundaries - e.g. the MOHO, sub-MOHO upper mantle reflectors and the lithosphere-asthenosphere boundary (LAB) are less well understood. This session solicits contributions dealing with tectonic and magmatic processes affecting the lower crust and continental lithosphere and geophysical imaging and modelling of the corresponding structures. The session will draw on recent large-scale geophysical experiments, and integrated geoscience programmes such as Europrobe, Lithoprobe and related IGCP projects. Issues to be addressed include: the role of intraplate magmatism in annealing major tectonic boundaries and refreshing the MOHO; critical evaluation of xenolith studies, especially the relevance of thermobarometric data in defining lower crustal and mantle depths and thermal structure; and the extent to which lateral variations in the deep structure reflect the upper crustal geology and tectonic history.
  - G8: Age growth and evolution of Antarctica (AGEANT)
    This symposium will evaluate recent developments in correlating Proterozoic to Cambrian tectonism, magmatism and high-grade metamorphism in Antarctica with adjacent regions in Gondwana. By contributing to this meeting you will also have the opportunity to develop a (Scientific Committee on Antarctic Research) SCAR working group to co-ordinate information that will enhance our geological knowledge of the ?Age Growth and Evolution of ANTarctica (AGEANT), namely:
    - Developing links and maintenance of common geochronological databases,
    - Compilation of comparable tectonic features and geochronological regions within continental blocks,
    - Integrate geophysical initiatives into continental tectonics,
    - Establish the thermal evolution of the continental crust,
    - Understand the nature of Rodinia and Gondwana reconstructions
  - G9: The subduction factory
    Subduction zones are key areas where oceanic crust and continental crust is recycled into the mantle and where new crust is formed. The processes whereby material is transferred from subducting plate to mantle wedge are not well understood and the chemical budget of the "Subduction Factory" remains unclear. Important issues are: quantification of fluxes from slab to wedge and from wedge to arc; the transport medium (aqueous fluids or melts); transformation of primitive arc to continental crust. The aim of this session is bring together scientists from diverse disciplines (geochemists, structural geologists, geophysicists, experimental petrologists, numerical modellers) capable of resolving these questions.
- Volcanic and Plutonic Processes and Products
  - H1: Thermodynamic, structural and physical properties of fluids and hydrous melts
    In most geological processes, either fluids or melts are involved. While for simplicity in the past in many cases only water-rich fluids were considered, it becomes more and more clear that solutes alter significantly the properties of fluids. This leads to interesting observations. Under mantle conditions fluids become indistinguishable form melts and they start to mix completely. In salt-bearing fluids, liquid and vapour coexist over a wide range of conditions in the Earth?s crust. As a consequence of phase unmixing, element and isotope fractionation occurs. If the coexisting fluids separate spatially, the bulk compositions of the rocks are altered severely. Salt contents drastically change some physical properties such as electrical conductivity. To understand these processes, the thermophysical and structural properties of these fluids and hydrous melts are required. The fields of research covered by this symposium include: composition of coexisting fluid and melt phases, element and isotope partitioning, measurement of PVT properties, equations of state, structure of fluids and hydrous melts, viscosities, conductivity, and related phenomena.
  - H2: Non-linear and chaotic dynamics in igneous petrology
    Application of non-linear and chaotic dynamics has had significant impact in the last decade on all scientific fields. The aim of the session is to provide a forum for the discussion of applications of non-linearity and chaos theory to igneous petrology problems, making special efforts to promote connections between the deterministic and stochastic traditions. Contributions are expected to cover all the topics related to non-linear and chaotic dynamics in igneous petrology. In particular, presentations on the following subjects are encouraged: chaotic dynamics, analysis and prediction of chaotic systems, fractal geometry, cellular automata, and neural networks.
  - H3: Growth of volcanic structures in the oceans, from ridge crests to the plate interiors
    This session aims to bring together marine geoscientists working on seamounts and submerged flanks of volcanic islands with volcanologists working on large subaerial volcanic edifices. Issues such as links between sector collapse and intrusion, and controls on edifice growth in different tectonic settings will be considered. We welcome contributions from any perspective, such as involving field observations, remote sensing, geophysics and analogue or numerical modelling, which address volcanic edifice growth and collapse. The session is sponsored by the Marine Studies Group of the Geological Society
  - H4: What is a magma chamber?
    This purpose of this session is to bring together groups from different disciplines to confront each other's models of magma chambers, to find areas of common ground and to identify ways of resolving current problems. Topics might include: defining, and identifying, the petrological/geochemical/geophysical magma chamber; the existence and longevity of melt (or mush) bodies in the crust and lithosphere and their role in processing melts on the way to the surface; the relationships between chamber filling or emptying and volcanic eruptions; and linking observations with fluid dynamical models of magma chambers. Contributions are welcomed from anyone working on any aspect of this problem.
  - H5:Rates of melting and melt extraction in the mantle and continental crust
    дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://eost.u-strasbg.fr/EUG
    Recent isotopic and numerical modelling suggests that segregation and transport of melts from their source regions, in both the asthenosphere and continental crust, can be geologically rapid. However, it is still unclear if fast segregation of melts in both environments is the norm or the exception, and whether the dominant mode of transport is one of porous seepage or focused (deformation-controlled) flow. This meeting will bring together the mantle and crustal communities to consider all aspects of the melt segregation and transport process. Relevant contributions from any area of numerical modelling, rock mechanics, field and xenolith studies, experimental and chemical/isotopic investigations are sought. An important goal will be to reconcile differences in transport rates obtained from isotopic measurements with predictions based on numerical models.
  - H6: Volcanic hazards: monitoring, prediction and mitigation
    Contributions to this symposium will involve results from the measurement of geophysical or geochemical signatures from actively erupting and restless volcanic systems. Interdisciplinary approaches are especially encouraged. Contributions are also welcome from scientists involved in communicating the interpretation of scientific data to civil authorities, the public or the media and in drawing up evacuation and contingency plans. The aims of this session are to bring together the many disciplines involved in a volcanic emergency and to highlight improvements that can be made in the communication between them and also to examine new and innovative integrated volcano surveillance technologies.
- Chemistry and Physics of Earth Material
  - J4: Quantitative modelling of diagenetic, metamorphic, deformational and igneous microstructures
    Microstructures form and evolve by a wide range of diagenetic, metamorphic, metasomatic, deformation and igneous processes, and under a variety of conditions and are of prime importance to the interpretation of geological history, since they records much of the geological history of the rock. While much has been achieved in the description of microstructures in rocks over the last century, it is just now that it has become feasible to quantitatively model the coupled processes acting to produce these textures quantitatively. Finite element, finite difference, front-tracking, self-consistent-theory, analytical and other models and techniques are all being applied to quantitatively model microstructural development. In this session we invite people to present state of the art modelling of these small scale processes, and where the microstructure/texture/fabric ("thin-section picture" of the rock) features prominently. We hope this session will lead to fruitful exchange of ideas, across the boundaries of geological sub-disciplines and different modelling techniques.
  - J5: High spatial resolution microanalysis in the transmission electron microscope: applications for the geosciences
    The high spatial resolution available within the new generation of TEMs (particularly those with field emission sources) allows for the detailed analysis of mineral intergrowths, inclusions, oscillatory zoning, exsolution textures and grain boundaries on the scale of nanometres. Energy dispersive X-ray (EDX) analysis and electron energy loss spectroscopy (EELS) permit full elemental quantification across virtually the whole periodic table enabling the analysis of the detailed geological evolution of mineral reactions including diffusion/advection paths and rates within geological systems. Associated techniques such as EDX mapping and particularly energy filtered TEM (EFTEM) provide rapid high resolution imaging of elemental distributions. Additional benefits of EELS include the ability to determine nearest neighbour coordinations, valencies and bond lengths associated with atomic species in mineralogical samples, examples include the determination of multivalent element ratios (e.g. Fe 2+ and Fe 3+) to determine redox states for mineral crystallisation and the elucidation of changes in structure, bonding and composition of minerals throughout the crust and mantle. EELS and EDX combined with Atom location by Channelling Enhanced Microanalysis (ALCHEMI) enhances the crystallographic site specificity of such information. This symposium aims to attract users of these (and related) techniques to present the current state-of-the-art in high spatial resolution geological microanalysis. In addition to applications-based contributions, we are also interested in developmental technique-based work.
- OTHER SYMPOSIA
  - L5: Deformation at convergent margins
    дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://www.campublic.co.uk/EUG/XI/submission.html
    ЙМЙ http://eost.u-strasbg.fr/EUG
    - (1) partitioned transpression and transtension in the upper plate at convergent boundaries (including the role of vertical axis block rotation (paleomagnetically-determined) in deformation partitioning);
    - (2) the role of pluton emplacement in accomodating upper plate deformation;
    - (3) the nature and structure of the detachment horizons that underlie domains of partitioned transpression;
    - (4) rates and plate tectonic processes in convergent margins, including the relationship between relative plate vectors at the subduction boundary and deformation in the overriding plate,
    - (5) deep crustal structure and modelling (seismic reflection and refraction studies, critical wedge theory, importance of inheritance in determining crustal structure),
    - (6) mineralisation and its relation to structure of the upper plate at convergent boundaries (Kiruna-type magnetite apatite, Olympic dam-type Fe- oxide- Cu- Au) and copper porphyry deposits).
  - O7: Tectonic and sedimentation
  - O15: Structural geology and tectonics
  - O16: Solid earth geophysics

нБК, 2001

Eleventh V.M. Goldschmidt Conference, Virginia, USA
May, 20-24, 2001
"Crustal Melting: From Grain Boundaries to Batholiths "
рПДБЮБ ФЕЪЙУПЧ - 16 ЖЕЧТБМС 2001 З.
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС:
(http://eost.u-strasbg.fr/EUG/) (http://cass.jsc.nasa.gov/meetings/gold2001/gold2001.1st.html)
The aim of this session is to bring together geochemists and petrologists to consider processes involved in, and the geochemical consequences of, melt generation, segregation, ascent and emplacement in the crust during orogenesis. These processes are investigated using fieldwork, microscopy, geochemistry, experiments, numerical methods, and theory. The geochemical consequences include crustal differentiation, the production of a granulite lower crust, concentration of heat producing elements in the upper crust and contamination of mantle-derived melts. Keynote addresses by Roger Powell, Nathalie Marchildon, Tracy Rushmer and Ed Sawyer are currently planned. Contributions, both oral and poster, that address any aspect of this broad theme will be welcome. We hope to arrange an informal field trip associated with this theme session.

йАОШ, 2001

йАМШ, 2001

бЧЗХУФ, 2001

уЕОФСВТШ, 2001

пЛФСВТШ, 2001

7-С НЕЦДХОБТПДОБС ЛПОЖЕТЕОГЙС РП ФЕФЛПОЙЛЕ РМЙФ ЙН. м.р.ъПОЕОЫБКОБ, нПУЛЧБ
30 - 31 ПЛФСВТС 2001 ЗПДБ
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: ЙОЖПТНБГЙПООЩЕ РЙУШНБ, ГЙТЛХМСТЩ, РТПЗТБННБ

оПСВТШ, 2001

нецдхобтпдобс лпожетеогйс "рпмстоще пвмбуфй ъенмй: зепмпзйс, фелфпойлб, теухтуопе ъобюеойе, ртйтпдобс утедб " Й уйнрпъйхн рп ртпелфх "ечтпртпвб " фелфпойлб рмйф ч бтиее й ртпфетпъпе: дбооще зепмпзйй й зепжйъйлй
тбвпюее упчеэбойе рп йфпзбн ьлуредйгйй "лойрпчйю - 2000" у-рЕФЕТВХТЗ
1-3 ОПСВТС 2001 ЗПДБ
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: ЙОЖПТНБГЙПООЩЕ РЙУШНБ, ГЙТЛХМСТЩ, РТПЗТБННБ
рЕФТПМПЗЙС НБЗНБФЙЮЕУЛЙИ Й НЕФБНПТЖЙЮЕУЛЙИ ЛПНРМЕЛУПЧ,фПНУЛ, фзх
28-29 ОПСВТС 2001 ЗПДБ
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: ЙОЖПТНБГЙПООЩЕ РЙУШНБ, ГЙТЛХМСТЩ, РТПЗТБННБ
Boston GSA Meeting
November, 5-8, 2001
Rheological effects of fluid-rock interactions at depth: From experimental constraints to interpretations of field observations
рПДБЮБ ФЕЪЙУПЧ - ДП 24 ЙАМС 2001
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://www.geosociety.org/meetings/2001/index.htm Recent investigations have demonstrated that fluid *composition* may be a rarely recognized but important variable in dictating the position of the brittle-ductile transition. This transition has been described as a broad zone, possibly several kilometers thick, where deformation may occur by either brittle or ductile deformation mechanisms. The position of this transition is dictated by temperature, mineralogy, grain size, strain rate, degree of work hardening, and the orientation of brittle structures with respect to the regional stress field. However, recent advances in experimental petrology have shown that the presence of an interstitial fluid and the composition of that fluid can also have a profound effect on the rheology of a deforming body of rock. For a fluid in textural equilibrium with the host phases, the surface energy characteristics between the fluid and the mineral grains determine whether a fluid is wetting or nonwetting. A wetting fluid is capable of being transmissive and therefore can enhance diffusion processes, which may ultimately favor or enhance a plethora of ductile mechanisms. In contrast, a nonwetting fluid may become nontransmissive, ultimately leading to an increase in fluid pressure and the ultimate stabilization of brittle deformation. Shifts from wetting to nonwetting behavior can occur over very narrow ranges of fluid composition and clearly vary depending on bulk fluid and bulk rock composition. The purpose of this session is to bring together a series of talks from the fields of experimental petrology and microstructural analysis, structural geology, applied fluid inclusion analysis, and economic geology to explore the relatively unrecognized but significant role of fluid composition in dictating the position of the brittle/ductile transition. This exploration in turn may provide insight into seismogenic processes and shear zone initiation. We encourage contributions from experimental and applied petrology, microstructural studies, field based kinematic studies, fluid inclusion studies of shear zone rocks, and studies of rheologic changes associated with boiling fluids. If there are a sufficient number of contributions, we hope to have both an oral session and a poster session on this topic
Pardee Keynote Symposia at GSA
November, 8-11, 2001
Melt in the Crust and Upper Mantle: How Much, Where, For How Long, and What Significance for Geodynamics?
Gary Solar, Dept. of Earth Sciences, State University of New York, College at Buffalo, Buffalo, NY 14222, (716) 878-4900; Mike Brown; Paul Tomascak.
рПДБЮБ ФЕЪЙУПЧ - ДП 24 ЙАМС 2001
дПРПМОЙФЕМШОБС ЙОЖПТНБГЙС: http://www.geosociety.org/sectdiv/northe/01nemtg.htm">
http://www.geosociety.org/meetings/2001/index.htm
http://www.geosociety.org/meetings/2001/techprog.htm
http://www.geosociety.org/meetings/2001/t-ftrip.htm
Understanding the role of partial melt in the geochemical and dynamic evolution of the lithosphere is the focus of a significant portion of the geologic community. With the advent of higher resolution geochemical measurements and more sophisticated geophysical and experimental techniques, enhanced communication between theoreticians, experimentalists and field geologists and geophysicists promises to result in considerable advances in our understanding of the role of melting in the growth and evolution of the crust and mantle. Many scientists are exploring new applications of LA-ICP-MS, LA-MC-ICP-MS and SIMS, for in-situ compositional and geochronologic studies, and high resolution imaging techniques such as tomography, for geophysical applications at crustal (seismic) and hand sample (X-ray and Synchrotron radiation) scales. These data reveal a complexity in crustal and mantle processes that has yet to be fully exposed to and appreciated by the Earth Science community. t is within this context that we propose a Pardee Keynote Symposium and an associated Topical Session to be held at the Boston 2001 meeting. For the Pardee Keynote Symposium we are planning for a half-day in which a variety of speakers, who have all shown significant innovation in their work, will present not only current research but also their vision of the future direction of research to understand crust-mantle interactions and crust-mantle evolution. In this symposium, and in the associated Topical Session, we are focusing on the following topics: the role of the mantle in a geochemically evolving lithosphere; the dynamics of partial melting in the continental crust and upper mantle; relationships between the grain-scale distribution of melt and the geochemical and physical properties of partially molten rocks; the specific links between petrologic and structural response to melt transport and accumulation; kinematic and dynamic expressions of partial melt distribution on the orogenic scale. We will consider how the presence or influence of melt can be detected from the outcrop to the plate scale. We will also encourage discussion of what new measurements and observations need to be made. For example, what kinds of laboratory experiments and theoretical studies can be done to refine the interpretation of seismic and geochemical data? How can outcrop/hand-specimen scale observations be used to provide links between laboratory/theoretical studies and large-scale geophysical observations? These questions are of particular importance now because plate-scale observatory initiatives using multiple geophysical techniques suggest significant volumes of melt at middle crustal depths in active orogens. We believe that this is an excellent time to bring together experts in a variety of fields to address this topic. With our focus on future research directions, in particular the integration of new kinds of data, obtained using state-of-the art analytical equipment, significant research questions, such as the how, when, where and implications of melt in the crust and upper mantle, can be addressed.

дЕЛБВТШ, 2001

[зМБЧОБС] [п РТПЕЛФЕ] [хЮБУФОЙЛЙ] [лПОЖЕТЕОГЙЙ] [цХТОБМЩ] [рХВМЙЛБГЙЙ] [мЕЛГЙЙ] [лХТУЩ]
[бФМБУ] [уМПЧБТШ] [уУЩМЛЙ] [Soft] [ьЛУРЕДЙГЙЙ] [рЕКЪБЦЙ] [уЧСЪШ]