Transcript Презентация PowerPoint - West Virginia University

Deep Crustal Seismic Transect –Ministry of Natural Resources
“Think big.”
-Jim Wright
Verkhoyansk-Kolyma – Magmatism Groups
Multidisciplinary Continental Dynamics Project:
Structural Evolution and
Continental Growth of Northeast Asia
TRACT (TPAKT)
Trans Russian Arctic Crustal Transect
Opportunity
• TRACT:
• Unique opportunity to link geology with newly acquired
geophysical data in NE Russia
• Future Scientific Drill Holes
Deep Crustal Seismic Transect –Ministry of Natural Resources
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2003-04
Scientific Rationale
• Continental Accretionary Orogens
– Continental assembly via microcontinent and arc accretion
– Accretion without ophiolites?
• Orogenic Loops
• Evolution of Magmatism in Collisional and Accretionary
Orogens
Topical
• Understand the origin of the Arctic Ocean-South Anyui
• Understand modern plate boundaries: Okhotsk? Plate
• Paleogeographic reconstructions
Societal Impact
• Economic geology and magmatism
• Tectonic setting of one of the world’s major gold,
silver and other metals provinces
• Support of International collaboration
• Graduate students-cross-pollenization
• Technology transfer
• Scientific Databases
• Seismic Hazards
Approaches to the Science
Existing Data
• Quality Geological maps exist at 1:200,000,
1:50,000
• Reflection Seismic, Gravity and Magnetics (2DV)
• Earthquake seismicity
• Trace and major element dataset
Approaches to the Science
New Investigations
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Detailed structural analysis
Parallel transects using the major rivers and roads
Geochronology (U-Pb SHRIMP, 40Ar/39Ar)
Thermochronology (FT, U-Th/He)
Use of detrital zircons for paleogeographic reconstructions
Petrology (Thermobarometry)
Geochemistry (Isotopes MC ICPMS, for Hf, Sr and Nd)
Boreholes 3 holes, 3 km deep, along line
– Heat flow, velocity, geophysical techniques
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Local microseismicity networks
INSAR
New Paleomagnetic approaches
GIS database implementation
Deep Crustal Seismic Transect –Ministry of Natural Resources
Chukotka
PriKo
Oloy
Omolon
OCVB
Transect Segments
1) Okhotsk-Chukotsk/Murgal arc
systems
2) Main plutonic belt
3) Ulakhan fault (Fujita, Hindle)
Deep Crustal Seismic Transect –Ministry of Natural Resources
Chukotka
PriKo
Oloy
Omolon
OCVB
Transect Segments
4) Omsukchan trough
5) Viliga turbidites
6) Omolon craton (Prikolyma related)
Deep Crustal Seismic Transect –Ministry of Natural Resources
Chukotka
PriKo
Oloy
Omolon
OCVB
Transect Segments
7) Oloy arc
8) South Anyui suture zone
9) Chukotka block
10) Wrangel island and offshore Arctic
Ocean
Participants
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Jaime Toro
Jeff Amato
Dave Stone
Jim Sears
Andrei Prokopiev
Pavel Minyuk
Vladimir Oxman
Paul Layer
Sam Mukasa
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Nikolai Goryachev
Elizabeth Miller
Vyacheslav Akinin
Sergei Voroschin
Marina Luchitskaya
Jim Wright
Warren Nokleberg
Kazuya Fujita
David Hindle
Continental Dynamics
• Continental Dynamics deadlines
– April 1, preproposal
– November 15, proposal
How do we get there?
• Need to identify US participants/institutions
• Need to form management structure (PIs)
• Need to identify Russian participants and
collaborations. Russian management team
(PI)
• Need to obtain funding for Russian
participants (through Russian sources)