Geophysical field and tectonic framework of the Chukchi Borderland, Arctic Ocean
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摘要: 利用高分辨率水深、重力、地磁和多道反射地震数据,综合分析了楚科奇边缘地及其周边区域的地形地貌和地球物理场特征,划分了区域构造单元。研究表明,楚科奇边缘地不仅是楚科奇大陆架外缘独特的地形单元,也是一个相对独立的构造单元,与周边的加拿大洋盆、阿尔法-门捷列夫大火山岩省、北楚科奇陆架盆地和阿拉斯加被动陆缘等构造单元在地球物理场和区域构造上具有截然不同的特征。楚科奇边缘地是一个地壳减薄的微陆块,新生代早、中期发生了大规模的E-W向构造拉伸作用,基底断块的差异性升降塑造了当前的地形地貌和沉积层的发育。边缘地可能形成于北楚科奇盆地侏罗纪-早白垩纪的张裂作用,而内部盆-脊相间排列的构造格局则可能与加拿大海盆相边缘地俯冲作用停止后的均衡调整有关。Abstract: On the basis of high-resolution bathymetry,gravity,magnetic and multi-channel reflection seismic data,the geomorphology and geophysical characteristic of the Chukchi Borderland and its adjacent area was synthetically analyzed and the tectonic division was made. The results shows that the Chukchi Borderland is a relatively isolated tectonic unit and has different geophysical and structural features from the peripheral units,they are Canada Oceanic Basin,Alpha-Mendeleev Large Igneous Province,North Chukchi Continental Shelf Basin and Alaska Passive Continental Margin. Chukchi Borderland is a micro-continental plate with thinned crust,where a large scale E-W oriented tectonic stretching had happened during the early and middle stage of the Cenozoic. Basement uplifting and subsiding is the controlling factor of the modern geomorphic features and sediments accumulation. The Chukchi micro-continental plate was supposed to result from the rifting process of the North Chukchi Basin in Jurassic to early Cretaceous Period,while its modern tectonic framework with juxtaposition of basins and ridges might be the result of isostatic regulation after the cease of subduction of oceanic crust in Canada Basin to the Borderland.
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Key words:
- Chukchi Borderland /
- geophysical field /
- tectonic unit /
- tectonic evolution
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Hunkins K L. The Arctic continental shelf north of Alaska[M]//Poole W H. Continental Margins and Island Arcs, Geol. Survey of Canada Paper. Geological Survey of Canada, Ottawa, 1966: 197-205. Herron E M, Dewey J F, Pitman W C. Plate Tectonics Model for the Evolution of the Arctic[J]. Geology, 1974, 2: 377-380. Dutro J T. Geology of Alaska bordering the Arctic Ocean[M]//Nairn A E M, Churkin M, Stehli F G. The Ocean Basins and Margins: The Arctic Ocean. New York: Plenum Press, 1981: 21-36. Grantz A L, May S, Mullen M, et al. The Canada Basin[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 257-288. Miller E L, Toro J, Gehrels G, et al. New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology[J]. Tectonics, 2006, 25: TC3013. Thiede J, Eldholm O, Myher A M. Scientific deep-sea drilling in high northern latitudes[M]//Spencer A M, Embry A F, Gautier D L, et al. Arctic Petroleum Geology, Memoirs 35. The Geological Society of London, 2011: 703-714. Moran K, Backman J, Brinkhuis H, et al. The Cenozoic paleoenvironment of the Arctic Ocean[J]. Nature, 2006, 441: 601-605. Stein R. Arctic Ocean sediments: processes, proxies, and paleoenvironment[J]. Elsevier Science & Technology, 2008: 608. Coles R L, Hannaford W, Haines G. Magnetic anomalies and the evolution of the Arctic, in Arctic[J]. Geophysical Review, 1978, 45: 51-66. Vogt R, Taylor P, Kovacs L, et al. Detailed aeromagnetic investigation of the Arctic basin[J]. Journal of Geophysical Research, 1979, 84(B3): 1071-1090. Kristofferson Y. Eurasia Basin[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 365-378. Cochran J R, Kurras G, Edwards M, et al. The Gakkel Ridge: bathymetry, gravity anomalies, and crustal accretion at extremely slow spreading rates[J]. Journal of Geophysical Research, 2003, 108(B2): 2116. Sohn R A, Willis C, Humphris S, et al. Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean[J]. Nature, 2008, 453:1236-1238. Baggeroer A B, Falconer R. Array refraction profiles and crustal models of the Canada Basin[J]. Journal Geophysical Research, 1982, 87(B7): 5461-5476. Hall J K. Chukchi Borderland[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 593-616. Jokat W, Uenzelmann-Neben G, Kristoffersen Y, et al. ARCTIC' 91: Lomonosov Ridge-a double sided continental margin[J]. Geology, 1992, 20: 887-890. Taylor P, Kovacs T, Vogt P, et al. Detailed Aeromagnetic Investigation of the Arctic Basin[J]. Journal Geophysical Research, 1981, 86(B7): 6233-6333. Coles R L, Taylor P. Magnetic anomalies[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 119-132. Laxon S, McAdoo D. Arctic Ocean gravity field derived from ERS-1 satellite altimetry[J]. Science, 1994, 265: 621-624. Lawver L A, Scotese C. A review of tectonic models for the evolution of the Canada Basin[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 593-618. Embry A F, Dixon J. The breakup unconformity of the Amerasia Basin, Arctic Ocean: evidence from Arctic Canada[J]. GSA Bulletin, 1990, 102: 1526-1534. Lawver L A, Grantz A, Gahagan L. Plate kinematic evolution of the present Arctic region since the Ordovician[J]. GSA Special Paper, 2002, 360: 333-358. Grantz A, Hart P E, Childers V A. Geology and tectonic development of the Amerasia and Canada Basins, Arctic Ocean[M]//Spencer A M, Embry A F, Gautier D L, et al. Arctic Petroleum Geology, Memoirs 35. The Geological Society of London, 2011:771-799. Klemperer S L, Greninger M L, Nokleberg W J. Crustal structure of the Bering and Chukchi shelves; deep seismic reflection profiles across the North American continent between Alaska and Russia[M]//Miller E L, Grantz A, Klemperer S. Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses (GSA Special Paper). Geological Society of America, Boulder, 2002: 1-24. Wolf L W, McCaleb R, Stone D, et al. Crustal structure across the Bering Strait, Alaska: onshore recordings of a marine seismic survey[M]//Miller E L, Grantz A, Klemperer S. Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses (GSA Special Paper). Geological Society of America, Boulder, 2002: 25-37. Grantz A, Clark D L, Phillips R L, et al. Phanerozoic stratigraphy of Northwind Ridge, magnetic anomalies in the Canada basin, and the geometry and timing of rifting in the Amerasia basin, Arctic Ocean[J]. Geological Society of American Bulletin, 1998, 110: 801-820. Halgedahl S L, Jarrard R D. Paleomagnetism of the Kuparuk River Formation from oriented drill core: Evidence for the rotation of the Arctic Alaska plate[M]//Tailleur I, Weimer P. Alaskan North Slope Geology, Pacific Section. SEPM, Santa Barbara, CA, 1987: 581-617. Mickey M B, Byrnes A P, Haga H. Biostratigraphic evidence for the prerift position of the North Slope, Alaska, and Arctic Islands, Canada and Sinemurian incipient rifting of the Canada Basin[M]//Miller E L, Grantz A, Klemperer S. Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses (GSA Special Paper). Geological Society of America, Boulder, 2002: 67-75. 马德毅. 中国第五次北极科学考察报告[M]. 北京: 海洋出版社, 2013. 张海生. 中国第三次北极科学考察报告[M]. 北京: 海洋出版社, 2009. Jakobsson M, Mayer L A, Coakley B, et al. The international bathymetry chart of the Arctic Ocean (IBCAO) version3[J]. Geophysical Research Letters, 2012, 39(12): 219. Kenyon S, Forsberg R, Coakley B. New Gravity Field for the Arctic[J]. EOS Transactions American Geophysical Union 89, 2008: 289-290. Maus S, Barckhausen U, Berkenbosch H, et al. EMAG2: A 2-arc min resolution Earth Magnetic Anomaly Grid compiled from satellite, airborne, and marine magnetic measurements[J]. Geochemistry, Geophysics, Geosystems, 2009(10):12. Darby D A, Jakobsson M, Polyak L. Icebreaker Expedition Collects Key Arctic Seafloor and Ice Data[J]. Eos, Transactions, American Geophysical Union 86, 2005: 549-556. Grantz A, Hart P E, May S D. Seismic reflection and refraction data acquired in Canada Basin, Northwind Ridge and Northwind Basin, Arctic Ocean in 1988, 1992 and 1993[D]. U.S. Geological Survey Open-File Report (2004-1243), 2004: 33. Hegewald A, Jokat W. Tectonic and sedimentary structures in the northern Chukchi region, Arctic Ocean[J]. Journal of Geophysical Research: Solid Earth, 2013, 118: 3285-3296. Sherwood K W, Johnson P P, Craig J D, et al. Structure and stratigraphy of the Hanna Trough, U.S. Chukchi Shelf, Alaska, and supplementary material on CD[M]//Miller E L, Grantz A, Klemperer S L. Tectonic Evolution of the Bering Shelf-Chukchi Sea-Arctic Margin and Adjacent Landmasses. The Geological Society of America Special Paper, Boulder, 2002: 39-66. Lebedeva-Ivanova N N, Zamansky Y Y, Langinen A E, et al. Seismic profiling across the Mendeleev Ridge at 82°N: evidence of continental crust[J]. Geophysical Journal International, 2006, 165: 527-544. Dove D, Coakley B, Hopper J, et al. Bathymetry, controlled source seismic and gravity observations of the Mendeleev ridge: implications for ridge structure, origin, and regional tectonics[J]. Geophysical Journal International, 2010, 183: 481-502. Shaver R, Hunkins K. Arctic Ocean geophysical studies: Chukchi Cap and Chukchi Abyssal Plain[J]. Deep-Sea Research, 1964, 11: 905-916. Jakobsson M, Macnab R, Mayer L, et al. An improved bathymetric portrayal of the Arctic Ocean: Implications for ocean modeling and geological, geophysical and oceanographic analyses[J]. Geophysical Research Letters, 2008, 35: 602-609. Schön J H. Physical Properties of Rocks: Fundamentals and Principles of Petrophysics[M]. Elsevier, Heidelberg, 2004: 600. Grantz A, Scott R A, Drachev S S, et al. Sedimentary successions of the Arctic Region (58-64°to 90°N) that may be prospective for hydrocarbons[M]//Spencer A M, Embry A F, Gautier D L, et al. Arctic Petroleum Geology, Memoirs 35. The Geological Society of London, 2011: 17-37. Jackson H R, Forsyth D A, Hall J K, et al. Seismic reflection and refraction[M]//Grantz A, Johnson L, Sweeney J F. The Arctic Ocean Region. Geological Society of America, Boulder, 1990: 153-170. Drachev S S, Malyshev N A, Nikishin A M. Tectonic history and petroleum geology of the Russian Arctic Shelves: an overview[J]. Petroleum Geology Conference series 7, 2010: 591-619. Houseknecht D W, Bird K J. Geology and petroleum potential of the rifted margins of the Canada Basin[M]//Spencer A M, Embry A F, Gautier D L, et al. Arctic Petroleum Geology, Memoirs 35. The Geological Society of London, 2011: 509-526. Embry A F, Dixon J. The age of the Amerasian Basin [C]//Thurston D K, Fujita K. Proceedings of the 1992 International Conference on Arctic Margins. U.S. Miner. Manage. Serv. Rep. 94-0040, 1994: 289-294. Grantz A L, May S. Rifting history and structural development of the continental margin north of Alaska[J]. American Association of Petroleum Geologists Memoir 34, 1982: 7-100. Grantz A, Hart P E. Geophysical and geological evidence that Amerasia Basin, Arctic Ocean was created by two phases of anti-clockwise rotation[J]. Geological Society of America Abstracts with Programs, 2006, 38(5): 1. Miller E L, Verzhbitsky V E. Structural studies near Pevek, Russia: implications for formation of the East Siberian Shelf and Makarov Basin of the Arctic Ocean[J]. Stephan Mueller Special Publication Series 4, 2009: 223-241. Niu Y L. Subduction initiation, trench retreat and global tectonic consequences: The origin of backarc basins in the western Pacific and effect on eastern China geology since the Mesozoic[M]//Zhai M G, Xiao W J. Plate Tectonics, Geological Events and Resources: New Advances in Geological Sciences.Beijing: Science Press, 2013: 1-25.
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