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首页> 外文期刊>Tectonophysics: International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth >Structural records of the Late Cretaceous-Cenozoic extension in Eastern China and the kinematics of the Southern Tan-Lu and Qinling Fault Zone (Anhui and Shaanxi provinces, PR China)
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Structural records of the Late Cretaceous-Cenozoic extension in Eastern China and the kinematics of the Southern Tan-Lu and Qinling Fault Zone (Anhui and Shaanxi provinces, PR China)

机译：中国东部白垩纪-新生代伸展带的构造记录以及南部的and庐和秦岭断裂带（中国安徽和陕西省）的运动学

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Our study of the Late Cretaceous-Cenozoic extension in Eastern China is a kinematic analysis of faults (≈ 1500 striated fault data, 175 stress solutions at 90 sites) that has permitted us to separate stress fields belonging to six tectonic events. A WNW-ESE extension (1) has affected Eastern China from the Campanian to the Late Palaeocene-Early Ypresian. Under this extension, the Qinling (QLFZ) and Southern Tan-Lu (STLFZ) Fault Zones have been dextral transtensional fault zones. A first transpressional event (2) (NNE-SSW shortening) has occurred during the Late Ypresian-Lower Lutetian; the QLFZ and the STLFZ have been dextral transpressional fault zones. A NE-SW extension (3) has affected the Weihe graben during the Palaeogene; after a second transpressional event (4), the NE-SW extension (5) has been rejuvenated during the Late Miocene and the QLFZ has been a normal fault zone again and the STLFZ a sinistral transtensional fault zone; synrift subsidence has occurred in the Weihe graben. The second transpressional event (4) (WNW-ESE shortening) has occurred during the Late Oligocene-Early Miocene, during a period of uplifting and exhumation. At that time, the STLFZ and the QLFZ have become sinistral transpressional fault zones. A period of extension (6) has taken place during the Late Pliocene-Quaternary; the extensional direction has trended ≈ NNW-SSE; during this event, the QLFZ has been a sinistral transtensional fault zone and the STLFZ a dextral transtensional fault zone. These results are compared with those previously published in order to evaluate the regional significance of these tectonic events.
机译：我们对中国东部晚白垩世-新生代伸展运动的研究是对断层的运动学分析（≈1500条横断层数据，在90个地点有175个应力解），这使我们能够分离出属于六个构造事件的应力场。 WNW-ESE扩展（1）影响了中国东部，从Campanian到晚新新世-早期伊普尔人。在此扩展下，秦岭（QLFZ）和南部Tan庐（STLFZ）断裂带为右旋张性断裂带。在Ypresian-Lower Lutetian晚期发生了第一个压抑事件（2）（NNE-SSW缩短）。 QLFZ和ST​​LFZ一直是右旋高压断裂带。 NE-SW扩展（3）影响了古近纪的渭河grab。在第二次压变事件（4）之后，NE-SW扩展（5）在中新世晚期已恢复新生，QLFZ再次成为正常断层带，而STLFZ成为左张性断裂带在渭河地区发生了沉陷。在渐新世-早中新世晚期，在隆升和发掘期间，发生了第二次压变事件（4）（WNW-ESE缩短）。那时，STLFZ和QLFZ成为了左旋高压断裂带。在上新世-第四纪后期发生了一段扩展期（6）;延伸方向趋向于≈NNW-SSE;在此事件中，QLFZ一直是左伸性断裂带，STLFZ是右伸性断裂带。将这些结果与以前发表的结果进行比较，以评估这些构造事件的区域意义。

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