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1.
~(40)Ar-~(39)Ar Age and Geological Significance of the Sawur Gold Belt in Northern Xinjiang, China 总被引：1，自引：1，他引：1
SHEN Ping SHEN Yuanchao ZENG Qingdong LIU Tiebing LI Guangming Institute of Geology Geophysics Chinese Academy of Sciences Beijing 《《地质学报》英文版》2005,79(2):276-285
1 IntroductionThe Sawur gold belt is an eastward extending section ofthe Zarma-Sawur gold-copper belt in Kazakhstan, locatedin the Sawur Mountain, northern Xinjiang, and mainlycomprises two large- to medium-sized gold deposits,accompanied by five small gold deposits and a series ofgold ore spots (Yin et al., 1996, 2003; Wang et al., 1999; Liet al., 2000; Liu et al., 2003; Shen et al., 2004a). TheKuo'erzhenkuola and Bu'erkesidai gold deposits are thebiggest and most important ones in this … 相似文献
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INTRODUCTIONA great number of records from ice cores andocean sediments ( Bond et al., 1993; Dansgaard etal., 1993; Grootes, et al., 1993 ) reveal that theearth has experienced an integrated cool warm cli matic cycle since the LGM, in the course of which aseries of rapid and high amplitude oscillations oc curred (Chondrogianni et al., 2004). These impor tant oscillations, known as Heinrich events, Youn ger Dryas event and last deglaciation, initia… 相似文献
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YIN Xiulan Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China LI Sitian China University of Geosciences Wuhan China YANG Jihai ZHANG Qiming China Offshore Oil Nahai Weast Corp. Zhangjiang China 《Continental Dynamics》2000,(1)
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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《矿物学报》2013,(Z2)
<正>目前,对于斑岩铜矿的研究主要集中于探讨温度区间为200800℃范围内矿床的成因问题,例如岩体形成时代及顺序、矿化和热液蚀变时代以及热液活动时限等(Barra et al.,2002;Masterman et al.,2004;Deckart et al.,2005;Pollard et al.,2005;Campbell et al.,2006;Mao et al.,2006;Baumgartner et al.,2009;Redmond and Einaudi,2010;Sillitoe and Mortensen,2010;Vry et al.,2010;Shen et al.,2012;Zhu et al.,2012)。虽然这些问题很重要,但是仍然不足以全面的认识和 相似文献
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<正>1 Introduction Many high yield shale gas areas in the World are discovered carbon isotope reversals:Barnett,Fayetteville(Zumberge et al.,2012),Marcellus(Tilley et al.,2013),Haynesville(Ferworn et al.,2008),Albany shale gas(Gao et al.,2014),Utica shale gas(Xia et al.,1999;Xia et al.,2012;Xia et al.,2013),the Foothills(Tilley et al.,2011), 相似文献
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CHEN Bin LIU Shuwen WANG Rui CHEN Zhichao LIU Chaoqun Key Laboratory of Orogenic Belts Crustal Evolution MOE School of Earth Space Sciences Peking University Beijing 《《地质学报》英文版》2006,80(6)
1 Introduction The tectono-thermal evolution of the North China Craton (NCC) in Late Archean to Paleoproterozoic times has long been attractive to many researchers (Wan et al., 2000; Zhao et al., 2000, 2002; Guo et al., 2001; Liu et al., 2002; Zhai and Liu 2003; Zhai, 2004; Yu et al., 2004; Kr?ner et al., 2005; Wilde et al., 2005). Zhao et al. (2000, 2002) proposed a tectono-thermo framework for the evolution of the NCCbased on detailed petrological and geochronological data, and they … 相似文献
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<正>The podiform chromitites in the Luobusa ophiolite,Southern Tibet,have received much attention because of the presence of ultrahigh-pressure minerals,such as microdiamonds(Bai et al.,1993;Yang et al.,2007;Xu et al.,2009),coesite(Yang et al.,2007)and highly reduced metal phases(Bai et al.,2000;Robinson et al.,2004).The 相似文献
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Environmental Assessments of Trace Metals in Sediments from Dongting Lake, Central China 总被引：1，自引：0，他引：1
INTRODUCTIONFresh water lakes are one of the planet’s mosti mportant freshwater resources.They support life invarious forms,develop tourism and provide uniquerecreational opportunities.It is also a good source ofthe provision of drinking-water for local communi-ties.Studies on trace elements in rivers,lakes,andsedi ments(Zhou et al.,2004;Gray et al.,2000;Grosheva et al.,2000;Klavins et al.,2000;Aucoinet al.,1999;Bortoli et al.,1998;Elbaz-Poulichet etal.,1996;Johansson et al.,1995;F r… 相似文献
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Zircon SHRIMP Dating for the Weiya Pluton, Eastern Tianshan: Its Geological Implications 总被引：18，自引：4，他引：18
ZHANG Zunzhong GU Lianxing WU Changzhi LI Weiqiang XI Aihua WANG Shuo State Key Laboratory of Mineral Deposit Research 《《地质学报》英文版》2005,79(4):481-490
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
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<正>1.Introduction The continental crust,covering nearly a third of the Earth's surface,is dominantly made up of granites and granodiorites(Rudnick and Gao, 2003).Although the vast majority of these granitoids are amphiboleand /or biotite-bearing,orthopyroxene-bearing granitoids form a minor but important component of the lower continental crust in many high-grade terrains(e.g.,Bohlender et al.,1992;Kilpatrick and Ellis,1992;Sheraton et al.,1992;Berger et al.,1995;Zhou et al., 1995;Peucat et al.,1996;Duchesne and Wilmart,1997;Hughes et al.,1997;Prame.1997;Frost et al.,2000;Janasi,2002;Mendes 相似文献
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Several thrust faults have been mapped in theYanshan belt ,as the thrust structure was first iden-tified by Wong (1928) (Ji et al .,2005 ; Wang et al .,2005a ;Davis et al .,2001 ,1998 ; Yang et al .,2001 ;Zheng et al ., 2000 ; Chen, 1998 ; Zhang et al .,1986 ; He ,1957 ;Chern and Hsiung,1935) .Becausethe Archean basement was widely involved in thethrust systemof the Yanshan belt ,domestic popularrecognition emphasized the thick-skinned characteris-tics and li mited horizontal displacement… 相似文献
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正1 Introduction Vegetation indices (VIs) derived from satellite observations are an essential source of information for operational monitoring of the Earth's vegetation (Qu et al.,2018;Yan et al.,2008).However,soil background dramatically affects the performances ofⅥs (Baret and Guyot,1991;Gilabert et al.,2002;Huete,1988;Qi et al.,1994).So soil-adjustedⅥs (Baret and Guyot,1991;Gilabert et al.,2002;Huete,1988;Qi et al.,1994) are 相似文献
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The First Discovery of a Large Sandstone-type Uranium Deposit in Aeolian Depositional Environment 总被引：1，自引：0，他引：1
MIAO Peisen JIN Ruoshi LI Jianguo ZHAO Hualei CHEN Lulu CHEN Yin SI Qinghong 《《地质学报》英文版》2020,94(2):583-584
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
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Relic UHP Structures in Dabie-Sulu Region, China:Structural Expression and Geodynamic Significance 总被引：3，自引：0，他引：3
Suo Shutian Zhong Zengqiu You Zhendong Zhou Hanwen Faculty of Earth Sciences China University of Geosciences Wuhan China 《中国地质大学学报(英文版)》2000,11(3)
INTRODUCTIONIn recent years a num ber of detailed m ineralogical- petro-logical studies have been carried out on the UHP and HPmetamorphic belts in the Dabie- Sulu region,central China(see review papers by Jahn,1999;Ernst and L iou,1999;Wallis et al.,1999;Hacker et al.,1996 ;L iou et al.,1996 ;Cong et al.,1994) . Various tectonic evolution models for theUHP belt in the Dabie- Sulu region have been constructed(e.g.,Webb etal.,1999;Hacker et al.,1996 ;Cong et al.,1994) .However,as … 相似文献
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Zhiyun TANG Longhua WU Yongming LUO 《中国地球化学学报》2006,25(B08):254-254
The study of the physicochemical behaviour of colloids and particles in nature has emerged as a scientific problem of critical importance because of the widespread acknowledgement of their significance in controlling the speciation and fate of essential nutrients and contaminants in the aquatic and soil environments （Ledin et al., 1995; Lead et al., 1999, Doucet et al., 200 l; McCarthy et al., 1989; Koterba et al., 1993; Kretzschmar et al., 1999）. Se＇quaris and Lewandowski （2003） developed a method based on sedimentation and centrifugation steps to fractionate agricultural top soils after suspension in water. However, progress in the field has been limited by the lack of appropriate techniques for the isolation and characterization of colloids and particles in their native form （Lead et al., 1997）. The primary difficulties in separation and analysis are colloidal instability and their small size and low concentration. As a result, reliable, unbiased and minimally perturbing methods for sampling and fractionation are primary requirements for the study of colloids and particles if valuable information is to be obtained. In recent years, cross-flow ultra-filtration （CFUF） has become one of the most commonly used techniques for collecting and separating freshwater and marine colloids and particles （Petrus evski et al., 1995; Gustafsson et al., 1999; Benoit et al., 1999; Sigg et al., 2000; Gue＇guen et al., 2002; Benedetti et al., 2003）. CFUF has hitherto been used for studies of the biogeochemical cycling of a variety of elements, such as carbon （Benner et al., 1992; Santschi et al., 1998）, radionuclides （Moran et al., 1992）, trace metals （Reitmeyer et al., 1996） and nutrients （Bauer et al., 1996）. The purpose of this study was to develop a protocol to fractionate particles in soil, to measure particle size distributions and to quantify chemical characteristics within different particle size fractions. 相似文献
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HU Huabin MAO Jingwen LIU Dunyi NIU Shuyin WANG Yanbin LI Yongfeng SHI Ruruo Shijiazhuang University of Economics Shijiazhuang Hebei China University of Geosciences Beijing Email: huhb@.com Institute of Geology Chinese Academy of Geological Science Beijing 《《地质学报》英文版》2005,79(4):491-496
1 Introduction Since the Guilaizhuang gold deposit was discovered in the 1980s, the Tongshi magmatic complex has attracted attention since it exhibits a spatial-temporal relationship to gold mineralization. In the past ten years, a number of detailed fundamental researches have been carried out on the complex, Guilaizhuang gold deposit and their relationships (Qiu et al., 1994; Lin et al., 1996; Yan et al., 1996; Xu et al., 1999; Kong et al., 2001; Shun et al., 2001). Up to date, some res… 相似文献