东天山雅满苏组火山岩LA-ICP-MS锆石U-Pb定年及其地质意义

罗婷; 廖群安; 陈继平; 张雄华; 郭东宝; 胡兆初

doi:10.3799/dqkx.2012.141

Volume 37 Issue 6

Jun. 2012

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LUO Ting, LIAO Qun-an, CHEN Ji-ping, ZHANG Xiong-hua, GUO Dong-bao, HU Zhao-chu, 2012. LA-ICP-MS Zircon U-Pb Dating of the Volcanic Rocks from Yamansu Formation in the Eastern Tianshan, and Its Geological Significance. Earth Science, 37(6): 1338-1352. doi: 10.3799/dqkx.2012.141

Citation:

LUO Ting, LIAO Qun-an, CHEN Ji-ping, ZHANG Xiong-hua, GUO Dong-bao, HU Zhao-chu, 2012. LA-ICP-MS Zircon U-Pb Dating of the Volcanic Rocks from Yamansu Formation in the Eastern Tianshan, and Its Geological Significance. Earth Science, 37(6): 1338-1352. doi: 10.3799/dqkx.2012.141

Citation:

LUO Ting, LIAO Qun-an, CHEN Ji-ping, ZHANG Xiong-hua, GUO Dong-bao, HU Zhao-chu, 2012. LA-ICP-MS Zircon U-Pb Dating of the Volcanic Rocks from Yamansu Formation in the Eastern Tianshan, and Its Geological Significance. Earth Science, 37(6): 1338-1352. doi: 10.3799/dqkx.2012.141

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LA-ICP-MS Zircon U-Pb Dating of the Volcanic Rocks from Yamansu Formation in the Eastern Tianshan, and Its Geological Significance

doi: 10.3799/dqkx.2012.141

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Gansu Non-Ferrous Metal Geological Exploration Bureau, Lanzhou 730000, China
3.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2012-07-19
Available Online: 2021-11-09
Publish Date: 2012-06-15

Abstract

Abstract

This paper presents the geochemical characteristics and isotope chronology of volcanics from Yamansu Formation,occurring in Jueluotage tectonic belt in the eastern Tianshan of China. Petrological,isotope chronology and geochemical features of these volcanic rocks show that: (1) Yamansu Formation is composed of basite-mesite-acidic volcanic rock,pyroclastic rocks and pyroclastic sedimentary rocks. And it is mainly of calc-alkaline series. The geochemical characteristics demonstrated and inherited zircon age suggests that Yamansu volcanic rocks were formed at arc settings with continental basement. (2) In situ zircon U-Pb LA-ICP-MS dating on the zircon of Yamansu Formation yielded an age of 348.0±1.7 Ma (MSWD=1.15) in the eastern section,335.9±2.4 Ma(MSWD=1.03)in the middle and 334.0±2.5 Ma (MSWD=1.02) in the western section,which stands for volcanic age. (3)The magmatic activity started from the east and then developed to the middle and western sections,like the close of scissors.
- Jueluotage tectonic belt,
- Yamansu Formation,
- zircon U-Pb dating,
- close of "scissors",
- geochemistry,
- petrology.

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LA-ICP-MS Zircon U-Pb Dating of the Volcanic Rocks from Yamansu Formation in the Eastern Tianshan, and Its Geological Significance

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