Paleomagnetism of the Upper Cretaceous red-beds from the eastern edge of the Lhasa Terrane: New constraints on the onset of the India-Eurasia collision and latitudinal crustal shortening in southern Eurasia
Paleomagnetism of the Upper Cretaceous red-beds from the eastern edge of the Lhasa Terrane: New constraints on the onset of the India-Eurasia collision and latitudinal crustal shortening in southern Eurasia
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拉萨地体东缘上白垩统红层的古地磁：印度-欧亚大陆碰撞发生和欧亚大陆南部地壳纬度缩短的新制约
DOI：
10.1016/j.gr.2017.04.018
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发表时间：
2017-08
影响因子：
6.1
通讯作者：
Zongwen Pu
中科院分区：
文献类型：
--
作者：
Yabo Tong;Zhenyu Yang;Junling Pei;Heng Wang;Yinchao Xu;Zongwen Pu
拉萨地体的晚白垩世位置对印度-欧亚大陆碰撞的起始具有重要的制约作用。然而，拉萨地体晚白垩世的古纬度一直存在争议。青藏高原拉萨地体东北缘丁青地区上白垩统金竹山组红层在580 ° C~695 ° C温度范围内分离出一个主要磁性成分。经倾斜校正的场地平均方向为Ds/Is = 0.9 °/24.3 °，k = 46.8，α 95 = 5.6 °，对应于平台的极点。Plon.= 71.4 °/273.1 °，A95 = 5.2 °。Hodych和Buchan（1994）基于各向异性的倾斜变浅试验表明，在荆竹山组中不存在倾斜偏置。根据红层的倾斜变浅试验和火山岩的潜在再磁化作用，对拉萨地体的白垩纪和古近纪两极进行了严格的筛选。总结的极点表明，拉萨地体早白垩世、晚白垩世和古近纪的古纬度分别为13.2 ° ± 8.6 ° N、10.8 ° ± 6.7 ° N和15.2 ° ± 5.0 ° N（参考点：29.0 ° N，87.5 ° E）。拉萨地体晚白垩世古纬度（10.8 ° ± 6.7 ° N）代表了印度-欧亚大陆碰撞前的欧亚大陆南缘。与特提斯喜马拉雅晚白垩世-古近纪极点和东亚60Ma参考极的对比表明，印度-欧亚大陆的初始碰撞发生在60.5 ± 1.5Ma以来的古纬度10.8 ° ± 6.7 ° N（参考点：29.0 ° N，87.5 ° E），随后在西藏发生了约1300 ± 910 km的碰撞后地壳纬向汇聚。碰撞后地壳汇聚的绝大多数是由横跨欧亚大陆南部的新生代褶皱和逆冲断层作用所容纳的。
The Late Cretaceous location of the Lhasa Terrane is important for constraining the onset of India-Eurasia collision. However, the Late Cretaceous paleolatitude of the Lhasa Terrane is controversial. A primary magnetic component was isolated between 580 °C and 695 °C from Upper Cretaceous Jingzhushan Formation red-beds in the Dingqing area, in the northeastern edge of the Lhasa Terrane, Tibetan Plateau. The tilt-corrected site-mean direction isDs/Is= 0.9°/24.3°,k= 46.8,α95= 5.6°, corresponding to a pole ofPlat./Plon.= 71.4°/273.1°, withA95= 5.2°. The anisotropy-based inclination shallowing test of Hodych and Buchan (1994) demonstrates that inclination bias is not present in the Jingzhushan Formation. The Cretaceous and Paleogene poles of the Lhasa Terrane were filtered strictly based on the inclination shallowing test of red-beds and potential remagnetization of volcanic rocks. The summarized poles show that the Lhasa Terrane was situated at a paleolatitude of 13.2° ± 8.6°N in the Early Cretaceous, 10.8° ± 6.7°N in the Late Cretaceous and 15.2° ± 5.0°N in the Paleogene (reference point: 29.0°N, 87.5°E). The Late Cretaceous paleolatitude of the Lhasa Terrane (10.8° ± 6.7°N) represented the southern margin of Eurasia prior to the collision of India-Eurasia. Comparisons with the Late Cretaceous to Paleogene poles of the Tethyan Himalaya, and the 60 Ma reference pole of East Asia indicate that the initial collision of India-Eurasia occurred at the paleolatitude of 10.8° ± 6.7°N, since 60.5 ± 1.5 Ma (reference point: 29.0°N, 87.5°E), and subsequently ~ 1300 ± 910 km post-collision latitudinal crustal convergence occurred across the Tibet. The vast majority of post-collision crustal convergence was accommodated by the Cenozoic folding and thrust faulting across south Eurasia.
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影响因子：
2.8
作者：
Deenen, Martijn H. L.;Langereis, Cor G.;Biggin, Andrew J.
通讯作者：
Biggin, Andrew J.
DOI：
10.1002/2014jb011362
发表时间：
2014-10
期刊：
Journal of Geophysical Research: Solid Earth
影响因子：
--
作者：
Yiming Ma;Tianshui Yang;Zhenyu Yang;Shihong Zhang;Huaichun Wu;Haiyan Li;Huai-kun Li;Weiwei Chen-
通讯作者：
Yiming Ma;Tianshui Yang;Zhenyu Yang;Shihong Zhang;Huaichun Wu;Haiyan Li;Huai-kun Li;Weiwei Chen-
影响因子：
3
作者：
Yabo Tong;Zhenyu Yang;Liang Gao;Heng Wang;Xudong Zhang;Chunzhi An;Yingchao Xu;Z. Han
通讯作者：
Yabo Tong;Zhenyu Yang;Liang Gao;Heng Wang;Xudong Zhang;Chunzhi An;Yingchao Xu;Z. Han
影响因子：
2.9
作者：
R. Voo
通讯作者：
R. Voo
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
Samuel Epstein;Ralph Buchsbaum;Heinz Lowenstam
通讯作者：
Samuel Epstein;Ralph Buchsbaum;Heinz Lowenstam