CAJ | 학술논문

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。
이용고분변솔수심、중력、지자화다도반사지진수거，종합분석료초과기변연지급기주변구역적지형지모화지구물리장특정，화분료구역구조단원。연구표명，초과기변연지불부시초과기대륙가외연독특적지형단원，야시일개상대독립적구조단원，여주변적가나대양분、아이법-문첩렬부대화산암성、북초과기륙가분지화아랍사가피동륙연등구조단원재지구물리장화구역구조상구유절연불동적특정。초과기변연지시일개지각감박적미륙괴，신생대조、중기발생료대규모적 E-W 향구조랍신작용，기저단괴적차이성승강소조료당전적지형지모화침적층적발육。변연지가능형성우북초과기분지주라기-조백성기적장렬작용，이내부분-척상간배렬적구조격국칙가능여가나대해분상변연지부충작용정지후적균형조정유관。
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 ana-lyzed and the tectonic division was made.The results shows that the Chukchi Borderland is a relatively isolated tec-tonic 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 Conti-nental Margin.Chukchi Borderland is a micro-continental plate with thinned crust,where a large scale E-W orien-ted 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.