| Geochemical Characteristics and Genesis of Late Cretaceous to Paleogene Basalts in the Tuyon Basin, South Tianshan Mountains |
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| 作者姓名： | WANG Yanbin WANG Yong LIU Xun FU Derong XIAO Xuchang and QI Longshui . Institute of Geology Chinese Academy of Geological Sciences Beijing . Hebei College of Technology Tangshan |
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| 作者单位： | WANG Yanbin1，WANG Yong1，LIU Xun，FU Derong1，XIAO Xuchang1 and QI Longshui2 1. Institute of Geology，Chinese Academy of Geological Sciences，Beijing 100037 2. Hebei College of Technology，Tangshan 063009 |
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| 摘 要： | 1. Introduction The Tianshan Mountains is a typical intercontinental orogenic belt in the world. From late Carboniferous to Permian, the old Tianshan formed during the tectonic amalgamation of the Tarim block, Tianshan block and Siberia craton (Carroll et al, 1990). Mid-Cenozoic basalts are widely distributed in both the Tuyon basin of southwest Tianshan and its western part of Tianshan in Jierjisi in late Cretaceous-Paleogene period, which indicates the activation of the old Tianshan.…
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Geochemical Characteristics and Genesis of Late Cretaceous to Paleogene Basalts in the Tuyon Basin, South Tianshan Mountains |
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| WANG Yanbin,WANG Yong,LIU Xun,FU Derong,XIAO Xuchang and QI Longshui . Institute of Geology,Chinese Academy of Geological Sciences,Beijing . Hebei College of Technology,Tangshan .Geochemical Characteristics and Genesis of Late Cretaceous to Paleogene Basalts in the Tuyon Basin, South Tianshan Mountains[J].大陆动力学(英文版),2001(1). |
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| Authors: | WANG Yanbin WANG Yong LIU Xun FU Derong XIAO Xuchang and QI Longshui |
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| Institution: | WANG Yanbin1,WANG Yong1,LIU Xun,FU Derong1,XIAO Xuchang1 and QI Longshui2 1. Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037 2. Hebei College of Technology,Tangshan 063009 |
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| Abstract: | The Tianshan Mountains is believed to be a typical intercontinental mountain belt, which is formed during the tectonic amalgamation of the Tarim and Tianshan blocks and the Siberian carton in Late Carboniferous-Permian period. A series of basaltic extrusive and intrusive units emplaced primarily into the Late Cretaceous-Paleogene sedimentary rocks in the Tuyon basin and its adjacent area, the South Tianshan Mountains. Geochemical data of the basalts show low Sr and Pb isotopic values and relative high Nd values (87Sr/86Sr = 0.703554 ~ 0.703884; 143Nd/144Nd = 0.512838 ~ 0.512904; 206Pb/204Pb = 18.0063 ~ 18.4720; 207Pb/204Pb = 15.5060; 208Pb/204P b= 37.8072 ~ 37.9290). The data of major elements, trace elements and rare earth elements of the basalts indicate that these basaltic rocks are similar to those beneath the Hawaiian Islands. In the Tuyon basin and its adjacent areas, some Cenozoic alkaline basaltic magmatism may be related to the Cenozoic activity of mantle plume |
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| Keywords: | basalt geochemistry genesis south Tianshan Tuyon basin Xinjiang |
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