Geophysical field and tectonic framework of the Chukchi Borderland, Arctic Ocean

Li Guanbao; Liu Chenguang; Hua Qingfeng; Han Guozhong; Liu Baohua

doi:10.3969/j.issn.0253-4193.2014.10.008

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Li Guanbao, Liu Chenguang, Hua Qingfeng, Han Guozhong, Liu Baohua. Geophysical field and tectonic framework of the Chukchi Borderland, Arctic Ocean[J]. Haiyang Xuebao, 2014, 36(10): 69-79. doi: 10.3969/j.issn.0253-4193.2014.10.008

Citation:

Li Guanbao, Liu Chenguang, Hua Qingfeng, Han Guozhong, Liu Baohua. Geophysical field and tectonic framework of the Chukchi Borderland, Arctic Ocean[J]. Haiyang Xuebao, 2014, 36(10): 69-79. doi: 10.3969/j.issn.0253-4193.2014.10.008

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Geophysical field and tectonic framework of the Chukchi Borderland, Arctic Ocean

doi: 10.3969/j.issn.0253-4193.2014.10.008

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, Qingdao 266061, China
2.
Key Laboratory of State Oceanic Administration for Marine Sedimentology and Environmental Geology, Qingdao 266061, China;National Deep Sea Center, Qingdao 266061, China

Received Date: 2014-02-25
Rev Recd Date: 2014-06-25

Abstract

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.
- Chukchi Borderland,
- geophysical field,
- tectonic unit,
- tectonic evolution

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