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| 1 | Multistage Deformation in the Northeastern Segment of the Jiangshao Fault (Suture) Belt: Constraints for the Relationship between the Yangtze Plate and the Cathaysia Old Land显示文摘Multistage deformation events have occurred in the northeastern Jiangshao Fault (Suture) Belt. The earliest two are ductile deformation events. The first is the ca. 820 Ma top-to-the-northwest ductile thrusting, which directly resulted from the collision between the Cathaysia Old Land and the Chencai Arc (?) during the Late Neoproterozoic, and the Jiangnan Orogenic Belt that formed as the ocean closed between the Yangtze Plate and the jointed Cathaysia Old Land and the Chencai Arc due to continuous compression. The second is the ductile left-lateral strike-slipping that occurred in the latest Early Paleozoic. Since the Jinning period, all deformation events represent the reactivation or inversion of intraplate structures due to the collisions between the North China and Yangtze plates during the Triassic and between the Philippine Sea and Eurasian plates during the Cenozoic. In the Triassic, brittle right-lateral strike-slipping and subsequent top-to-the south thrusting occurred along the whole northeastern Jiangshao Fault Zone because of the collision between the North China and Yangtze plates. In the Late Mesozoic, regional extension took place across southeastern China. In the Cenozoic, the collision between the Philippine Sea and Eurasian plates resulted in brittle thrusts along the whole Jiangnan Old land in the Miocene. The Jiangshao Fault Belt is a weak zone in the crust with long history, and its reactivation is one of important characteristics of the deformation in South China; however, late-stage deformation events did not occur beyond the Jiangnan Old Land and most of them are parallel to the strike of the Old Land, which is similar to the Cenozoic deformation in Central Asia. In addition, the Jiangnan old Land is not a collisional boundary between the Yangtze Plate and Cathaysia Old Land in the Triassic. | ZHANG Jin LI Jinyi XIAO Wenxia FENG Qianwen MA Zongjin | 2013 | Acta Geologica Sinica(English Edition)2013，87，4： | 7 |
| 2 | Zircon U-Pb Age and Geochemistry of the Ore-hosting Ultramafic Complex of Zhou'an PGE-Cu-Ni Deposit,Henan Province,Central China显示文摘The Zhou'an PGE-Cu-Ni deposit was recently discovered in the Qinling orogenic belt bound by the Yangtze and the North China Cratons. It is a blind deposit thoroughly covered by the Cenozoic alluvial sediments in the Nanyang Basin. As the first large PGE-Cu-Ni deposit discovered in the Qinling-Dabie-Sulu orogenic belt, its geological and geochemical characteristic, isotope age, genesis and tectonic setting are of wide concern in both scientific studies and ore exploration. In this contribution, we report the results obtained from a pioneering study. The Zhou'an ultramafic complex is ferruginous, with m/f=4.79-5.08, and shows the nature of tholeiite series. It is rich in light rare earth elements, Rb, Th, U, La, Sm, Zr and Hf, and poor in heavy rare earth elements, Nd and Ta, suggesting an intraplate setting. It has high 87Sr/86Sr and low 143Nd/144Nd ratios. The ratios of Zr/Nb, La/Nb, Ba/Nb, Rb/Nb, Th/Nb, Th/La and Ba/La, suggest the magma originated from lithosphere mantle. The Fo values of olivine and Pd/Ir-Ni/Cu diagram suggest primary magma was High Mg basalt. The laser ablation inductively coupled plasma atomic emission spectroscopy zircon U-Pb age is 641.5±3.7 Ma. | YAN Haiqing DING Ruiying TANG Zhongli WANG Yalei LIU Shuang MA Jiahong HU Yanqiang CHEN Kena | 2012 | Acta Geologica Sinica(English Edition)2012，86，6： | 6 |
| 3 | Geochemical Constrains on Petrogenesis and Tectonic Setting of Volcanic Rocks from the Baimianxia and Sanwan Formations in the Northern Margin of the Yangtze Plate显示文摘根据 petrogeochemical 数据, Baimianxia 形成的暴烈的熔岩能被分类进二个单位:高 TiO2 和低 TiO2。前者的 TiO2 集中通常比 1% 高,它与高级变态发生在更低的部分,但是后者是不到 1% 并且与低档变态在上面的部分外面收割。high-TiO2 单位被显示出高稀土元素元素(REE ) 内容的 tholeiitic 熔岩统治(REE = 83.4180.8 g/g ) ,高轻 / 重的 REE (LREE/HREE ) 比率(LREE/HREE=2.175.85 ) 和弱否定 Eu 异例(Eu=0.791.01 ) 。它的踪迹元素模式关于 Th 显示弱 Nb-Ta 异例, K, La, Ce,出现在内板暗岩亲密关系。相反, low-TiO2 单位被低 REE 内容,低 LREE/HREE 比率,和显著 Nb-Ta 异例描绘,显示典型的弧或大陆人弧签名。从 Sanwan 形成的暗岩和安山岩的使球粒状陨石正常化的 REE 模式是公寓或 LREE 弄空,它很类似于正常中间海洋的暗岩。因此,我们建议这些熔岩应该在一个背弧盆背景被形成。在更低的部分的暗岩的 Sr-Nd 同位素的数据建议岩石将在 1144 妈被形成。基于 geochemical 和暗岩的同位素的特征,我们建议在 Baimianxia 形成的低部分的这些岩石应该从 asthenospheric 发源海洋岛的像暗岩的披风来源,可以被石榴石 lherzolite 的部分融化生产,并且显著地经历了部分结晶化并且外壳或 lithospheric 披风污染在旅途中到表面。然而,激光脱离诱导地联合了从 Baimianxia 形成的上面的部分暗岩样品标明日期的锆石 U-Pb 给 437 妈的血浆团 spectrometry,显示早古生代的年龄。在这份报纸的 geochemical 分析建议他们可以响应水的液体从一条弧或大陆人弧发源或融化从一个 subducting 平板驱逐了,并且部分融化发生在石榴石稳定性域里。在 Sanwan 形成的暗岩和安山岩的样品证明他们从类似于正常中间海洋的暗岩的弄空的披风来源被导出。最后,我们能断定在 Baimianxia 形成的更低的部分的熔岩原生地在中间代表裂缝相关的火山作用的地质的记录,它通常被认为是大陆人决裂的先锋并且由海洋的盆从 Neoproterozoic 形成到列在后面早古生代。而,在 Baimianxia 形成和 Sanwan 形成的上面的部分的熔岩可能被产生了由海洋并且发生了在的大陆人变换早古生代。 | XU Xuey CHEN Junlu1 LI Xiangmin MA Zhongping WANG Hongliang LI Ping LI Ting | 2011 | Acta Geologica Sinica(English Edition)2011，85，6： | 3 |
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