Late Cretaceous-Cenozoic deformation of northeast Asia
Late Cretaceous-Cenozoic deformation of northeast Asia
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DOI：
10.1016/s0012-821x(02)00499-5
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发表时间：
2002-04-15
影响因子：
5.3
通讯作者：
Müller, RD
中科院分区：
文献类型：
--
作者：
Gaina, C;Roest, WR;Müller, RD
板块构造范式意味着刚性板块和狭窄的板块边界。相反，扩散板块边界在海洋和大陆中都很常见[R.G，Gordon，Annu，Rev. Earth Planet。Sci. 26（1998）615-642]，并且它们的历史难以约束，特别是在偏远的构造复杂的地区，例如东北亚[M.E.南卡罗来纳州查普曼所罗门，J.地球物理学。81（1976）921-930]。在这里，我们展示了北大西洋海洋磁场的广泛性[R。Macnab等人，EOS 76（1995）449，458]和重力数据[D.T. Sandwell，W.H.F. Smith，J. Geophys. Res. 102（1997）10039-10054]可用于解释沿着扩散的大陆欧亚-北美板块边界的连续变形期，具有严格的置信限。（拉普捷夫海为14毫米/年，堪察加为20毫米/年）导致了上扬斯克山脉的逆冲，68 ~ 40 Ma的伸展作用，包括莫马裂谷系在内的一系列地堑的形成，使其伸展了约400 km。自40 Ma以来，随时间变化的压缩和平移沿着的莫马裂谷系统创建的走滑断层，逆冲断层和褶皱的速率高达6.3毫米/年。在拉普捷夫海地区，从晚白垩世晚期到现在的600公里的延伸形成了拉普捷夫海和勒拿河裂谷系统。我们的模型预测的变形适合大多数地质特征形成在拉普捷夫海和东北亚中部在晚白垩世-新生代，最近的变形（晚中新世-上新世）是不是很好的约束，因为我们的模型缺乏数据年轻于11 Ma。发生在堪察加半岛的变形反映了一个复杂的构造环境，我们的模型的预测只是试探性的。版权所有（C）2002 Elsevier Science B. V.保留所有权利。
The plate tectonic paradigm implies rigid plates and narrow plate boundaries. In contrast, diffuse plate boundaries are common both in the oceans and continents [R.G, Gordon, Annu, Rev. Earth Planet. Sci. 26 (1998) 615-642], and their history is difficult to constrain, especially in remote, tectonically complex areas such as northeast Asia [M.E. Chapman, S.C. Solomon, J. Geophys. Res. 81 (1976) 921-930]. Here we show how extensive North Atlantic marine magnetic [R. Macnab et al., EOS 76 (1995) 449, 458] and gravity data [D.T. Sandwell, W.H.F. Smith, J. Geophys. Res. 102 (1997) 10039-10054] can be used to unravel, with tight confidence limits, successive periods of deformation over 80 million years, along the diffuse continental Eurasian-North American plate boundary, A period of compression in the Late Cretaceous (14 mm/yr in the Laptev Sea to 20 mm/yr in Kamchatka) led to thrusting in the Verkhoyansk Mountains, and was followed by extension from 68 to 40 Ma when similar to400 km of extension was accommodated by the formation of a series of grabens, including the Moma Rift system. Since 40 Ma, time-varying compression and transpression along the Moma Rift system created strike-slip faults, thrusts and folds at rates up to 6.3 mm/yr. In the Laptev Sea region, 600 km of extension from latest Late Cretaceous to present created the Laptev Sea and Lena Rift systems. The deformation predicted by our model fits most geological features formed in the Laptev Sea and central northeast Asia during Late Cretaceous-Cenozoic times, The most recent deformation (Late Miocene-Pliocene) is not very well constrained since our model lacks data younger than I I Ma. The deformation that occurred in Kamchatka reflects a complex tectonic setting and our model's predictions are only tentative. Crown Copyright (C) 2002 Elsevier Science B.V. All rights reserved.