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1.
1 Introduction Voluminous literature has resulted from study of the geology and tectonic evironments of post-orogenic granitoids in eastern Tianshan (He et al., 1995; Han et al., 1997; Gu et al., 1999, 2001; Li et al., 2003; Chen et al., 2004). Previous contributions (Hu et al., 1997; Li et al., 2003) indicate that major events of continental collision in northern Xinjiang occurred around 300 Ma. Then, the tectonics converted from compression to extension, resulting in the uplifting of th…  相似文献   

2.
正Asian aridity can be traced back to the early Cenozoic (e.g.,Guo et al.,2008;Licht et al.,2016;Li et al.,2018a).Previous modelling studies focus mainly on the monsoon climate during the early Cenozoic,and studies for the Asian aridity are still limited (e.g.,Huber and Goldner,2012;Zhang et al.,2012;Li et al.,2018b).Here Asian aridity during the early Cenozoic is investigated through climate modelling by changing atmospheric CO_2 concentration,orbital parameters,and topography.  相似文献   

3.
正The exploration depth of sandstone-type uranium deposits worldwide is mostly less than 700 m, and most of them occur in strata of fluvial facies(Adams et al., 1981; Jin et al., 2016; Hou et al., 2017). Only a few small uranium deposits have been reported in aeolian depositional environments(Isachsen et al., 1955; Li et al.,  相似文献   

4.
<正>Exploration at home and abroad have proved that oil and gas preserved in mud-shale reservoir is frontier for oil industry,marine mud-shale in America and marine/terrestrial mud-shale in China both exhibited good potential(Zhang et al.,2008;Nie et al.,2009;Li et al.,2010;Dong et al.,2011;Jiang et al.,2012).Although study on shale gas started late in China with many topics  相似文献   

5.
<正>1 Introduction Daxinganling region is one of the most important nonferrous metal metallogenetic province(Wu et al.,2011;Li et al.,2014).The northern Daxinganling was a geological blank area in China formerly(Li et al.,2017).However,the region has a huge resource potential.Forty metal deposits have been found in the area recently,with  相似文献   

6.
INTRODUCTIONThe anchorage of geomaterial , including shaftanchors and prestressed tendons ,is usually used ingeotechnical engineering. Owing to various advanta-ges ,these two anchorage types are widely used instructures in China ( Cao et al ., 2003 ; Fu et al .,1999 ;Lu et al .,1998 ; Li et al .,1995) . Shaft an-chors can be classifiedinto three kinds by the forceinthe shaft and cement grout :tensile ,press ,and sheartype (Lu et al .,1998) . The tensile type is the mostpopular in China…  相似文献   

7.
<正>A series of Ni-Cu sulfide deposits hosted in Early Permian mafic-ultramafic complexes occur along the~500km long linear Huangshan-Jingerquan belt in the East Tianshan at the southern margin of the Central Asian Orogenic Belt(Fig.1)(Zhou et al.,2004;Song and Li,2009;Song et al.,2011;Qin et al.,2011;Deng et al.,2014).Questions for genetic link between these deposits and the  相似文献   

8.
<正>研究碳酸盐矿物中的元素及同位素组成,对研究古气候古环境有着重要的意义,因此,学界内对于各种碳酸盐矿物的平衡分馏数据有着极大的需求。近年来,一系列的理论计算(Rustad et al.,2010;Schauble,2011;Pinilla et al.,2015等)及实验工作(Pearce et al.,2012;Li et al.,2012等)提供了Ca、Mg、Fe  相似文献   

9.
1. IntroductionRegional geochemistry is becoming an effective means to reveal regional crustal evolution. Many researchers have explored the evolution of continental lithosphere, crust-mantle interaction and mineralization setting by studying the structure and composition of the continental crust over various regions (Weaver and Tarney, 1984; Taylor and Mclennan, 1985; Shaw et al., 1986; Li et al., 1990; Gao et al., 1990; Zhang et al., 1994). The Qinling-Dabie Orogenic Belt, which travers…  相似文献   

10.
In recent years, fossils recognized as sponges and animal embryos have been reported in the Doushantuo phosphate rocks from the Guizhou Province(Li et al., 1998, Xiao et al., 1998). Zhang et al.(1998) disagreed with the interpretation of Li et al. that some of the needle-formed structures were monaxial spicules of sponges. They considered that these structures could be  相似文献   

11.
1 Introduction The Gaojiacun intrusive complex is one of the numerous ultramafic-mafic intrusions in Sichuan Province of China. It was mapped during the 1970s and studied mainly by Chinese scientists (e.g. Geological Team 106, 1975; Shen et al., 1986, 1989; CGGJC, 1986; Yang et al., 1993; Li et al., 1995; Shen et al., 2003; Zhu et al., 2004a). Since the year 2000, China has become one of the largest PGE consumers. While the country can produce only less than 1 ton PGE/year, the Chin…  相似文献   

12.
1. IntroductionThe discovery of delicately persevered multicellular algae and possible animal embryos from the terminal Proterozoic Doushantuo Formation has greatly changed our views on the origin and early evolution of metaphyte and metazoan (Chen et al., 1991, 1992; Zhang et al., 1992, 1998; Li et al., 1997; Xiao et al., 1998), and encourages us to look for the evidences of advanced lives in older rocks. Some jellyfish fossils were reported in the Piyuancun Formation (equated with Dengyi…  相似文献   

13.
正Objective The Nenjiang–Heihe structural belt is located in the eastern Xing’anling Mongolian Orogenic Belt between the Songnen block and Xiang’an block.This structural belt has long been the focus of geological scholars(Miao Laicheng et al.,2003;Liang Chenyue et al.,2011;Li Chao et al.,2017),which has complex geological condition,  相似文献   

14.
The latest Cretaceous strata of the Jiaolai Basin were studied in two scientific cores,including LK-1 drilled by the Institute of Geology,Chinese Academy of Geological Sciences(Li et al.,2018;Li et al.,2020),and JK-1 drilled by the Shandong Institute of the Geological Survey and Institute of Geology,Chinese Academy of Geological Sciences(Xu et al.,2017).However,outcrop sections were poorly studied,and the latest Cretaceous charophyte flora in particular had not previously been adequately documented from outcrops in the Jiaolai area.  相似文献   

15.
<正>The most Li deposits were found in lake waters or igneous rock.In recent years,anomalous concentrations of lithium in coal have been reported by several coal geologists(Sun et al.,2010,2012a,2013a;Dai et al.,2012).Some coal geologists argued that these concentrations have economic significance(Sun et al.,2012b,2013b,2014).This discovery has even been reported by Khanchuk et al.(2013)in"The Newsletter of Society for Organic Petrology",and the report was  相似文献   

16.
<正>1 Introduction East Kunlun orogen(EKO)stretching more than 1000km in E-W extension is located in the western segment of Central Orogen Belt(COB),China(Xu et al.,2006,Li et al.,2014).There outcropped Cambrian ophiolites  相似文献   

17.
<正>近年来,铜同位素的研究及其地质应用取得了重要进展(Maréchal et al.,1999;Zhu et al.,2000;Mathur et al.,2005;Markl et al.,2006;Pokrovsky et al.,2008;Maher et al.,2011;Dekov et al.,2013;Mathur and Fantle,2015),  相似文献   

18.
<正>越来越多的研究结果表明,Re在不同硫化物间存在一定的分配规律。例如:辉钼矿的Re含量往往比共生的黄铁矿(Li et al.,2011)或黄铜矿(Zhu and Sun,2013)高3~5个数量级;黄铁矿的Re含量普遍比闪锌矿(Morelli et al.,2004)和方铅矿(Stein et al.,2000)高3~30倍;铅锌矿床中闪锌矿的Re含量又明显高于方铅矿(Liu et al.,2015)。这些很可能与Re在硫化物中分配系数的差异,即各硫化物载Re能力的  相似文献   

19.
After a slow recovery from the end-Permian extinction during the Early Triassic and rapid radiation in the Middle Triassic, evolution of organisms reached a new peak phase in the Late Triassic. The Guanling Biota from the Wayao Member （conodont Paragondolella polygnathiformis Zone）, Falang Formation, Xinpu, Guanling County, Guizhou Province, southwestern China corresponds to this peak that marks the full recovery from the end-Permian extinction of marine ecosystems. The biota is of high diversity, containing well preserved and completely articulated skeletons of vertebrates comprising marine reptiles, fishes, and invertebrates including crinoids, ammonites, bivalves, and other fossils, and is one of the best examples of marine ecosystem records in life history. The fossil marine reptiles and crinoids are most significant in this biota, especially the marine reptiles, which provide an important link between the Triassic Pacific and Tethys, and between Triassic basal forms and the Jurassic-Cretaceous marine top predators. The most remarkable fossils are the large completely articulated ichthyosaur skeletons up to and more than 10 m, and the first recorded thalattosaurs and placodonts in China. Following our review, of the 17 named reptilian taxa the eight listed here are considered to be valid： three ichthyosaurs （Qianichthyosaurus zhoui Li, 1999; Guizhouichthyosaurus tangae Cao and Luo in Yin et al., 2000, Guanlingsaurus liangae Yin in Yin et al., 2000）, three thalattosaurs （Anshunsaurus huangguoshuensis Liu, 1999, Xinpusaurus suni Yin in Yin et al., 2000, Xinpusaurus kohi Jiang et al., 2004）, and two placodonts （Sinocyamodus xinpuensis Li, 2000, Psephochelys polyosteoderma Li and Rieppel, 2002）. Mixosaurus guanlingensis Cao in Yin et al., 2000 might be a junior synonym of Qianichthyosaurus zhoui Li, 1999, and Cymbospondylus asiaticus Li and You, 2002 and Panjiangsaurus epicharis Chen and Cheng, 2003 might be junior synonyms of Guizhouichthyosaurus tangae Cao and Luo in Yin et al., 2000. It needs to re-describe the holotypes after a complete preparation for clarifying the taxonomic status of Typicusichthyosaurus tsaihuae Yu in Yin et al., 2000, Xinpusaurus bamaolinensis Cheng, 2003, Neosinosaurus hoangi （Zhou in Yin et al., 2000）, Wayaosaurus geei Zhou in Yin et al., 2000, Wayaosaurus bellus Zhou in Yin et al., 2000 and Placochelys ？ minutus Yin and Luo in Yin et al., 2000.  相似文献   

20.
1. Introduction In recent years, growing attention has been focused on diapirs because of their significance to hydrocarbon accumulation in basins (Barber & Brown, 1988; Martin Hovland et al., 1989; Law et al., 1989; Collier et al., 1990; Lewis et al., 1994; Carmelo Monaco et al., 1996; Hieke et al., 1996; Hieke et al., 1996; Lewis et al., 1996; Limonov et al., 1996; Gallardo & Blackwell, 1999). With more and more effort devoted to the studies of the northern continental marginal basins …  相似文献   

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