ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN

LIAO Hua; HU Dao-gong; ZHANG Xu-jiao; YU Wen-lin; GUO Tao

Volume 20 Issue 3

Sep. 2014

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Article Navigation > Journal of Geomechanics > 2014 > 20(3): 292-298

LIAO Hua, HU Dao-gong, ZHANG Xu-jiao, et al., 2014. ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN. Journal of Geomechanics, 20 (3): 292-298.

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ZIRCON U-Pb AGE FOR GRANITE OF THE ORDOVICIAN FORMATION AND ITS TECTONIC SIGNIFICANCE IN THE SOUTHERN QILIAN

1.
School of Geosciences and Resources, China university of Geosciences, Beijing 100083, China
2.
Institute of Geomechanics, Chinese Academy of Geological Science, Beijing 100081, China

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Received: 2014-04-11
Published: 2014-09-01

Abstract

Abstract

Caledonian movement is a very important tectonic deformation stage since the Early Paleozoic in Qilian. The most intense tectonic activity began to emerge between the late Silurian and Early Devonian. The granitic intrusive began to emerge in early Caledonian movement. To the late Caledonian movement, South Qiian is developed in neutral-acidic intrusive rocks, and especially in the south western part of Qilian is relatively concentrated, the rock mass around in Hala Lake and Yangkang, Zhihema, etc. We made zircon U-Pb dating for granite by LA-MC-ICPMS. Zircon U-Pb age determination results show that, the formation of granite at the age of 461.5±1.6 Ma. It indicates that the geological age of granite in Saodi belongs to Middle Ordovician. Thus, the Balonggonggeer Formation should be earlier than the Middle Ordovician.
- granite,
- zircon U-Pb age,
- Ordovician,
- southern Qilian

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References(16)

References

[1]	冯益民, 何世平.祁连山大地构造与造山作用[M].北京:地质出版社.1996. FENG Yi-min, HE Shi-ping. Geotectonics and orogenesis in Qilian Mountains[M]. Beijing: Geological Publishing House, 1996.
[2]	许志琴, 杨经绥, 姜枚, 等.大陆俯冲作用及青藏高原周缘造山带的崛起[J].地学前缘, 1999, 6(3): 139~151. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY199903018.htm XU Zhi-qin, YANG Jing-sui, JIANG Mei, et al. Continental subduction and uplifting of the orogenic belts at the margin of the Qinghai-Tibet Plateau[J]. Earth Science Frontiers, 1999, 6(3): 139~151. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY199903018.htm
[3]	樊光明, 雷东宁.祁连山东南段加里东造山期构造变形年代的精确限定及其意义[J].地球科学:中国地质大学学报, 2007, 32(1): 39~44. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200701004.htm FAN Guang-ming, LEI Dong-ning. Precise timing and significance of Caledonian structural deformation chronology in southeast Qilian[J]. Earth Science: Journal of China University of Geosciences, 2007, 32(1): 39~44. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200701004.htm
[4]	许志琴, 杨经绥, 吴才来, 等.柴达木北缘超高压变质带形成与折返的时限及机制[J].地质学报, 2003, 77(2): 163~176. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200302006.htm XU Zhi-qin, YANG Jing-sui, WU Cai-lai, et al. Timing and machanism of formation and exhumation of the Qaidam Ultra-Pressure Metamorphic Belt[J]. Acta Geologica Sinica, 2003, 77(2): 163~176. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200302006.htm
[5]	张博文. 青海南祁连造山带内生金属矿床成矿作用研究[D]. 长春: 吉林大学, 2010. ZHANG Bo-wen. Study on metalliferous deposits mineralization in southern Qilian Orogenic Belt, Qinghai Province[D]. Changchun: Jilin University, 2010.
[6]	吴才来, 姚尚志, 杨经绥, 等.北祁连洋早古生代双向俯冲的花岗岩证据[J].中国地质, 2006, 33(6): 1197~1208. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200606003.htm WU Cai-lai, YAO Shang-zhi, YANG Jing-sui, et al. Double subduction of the Early Paleozoic North Qilian oceanic plate: Evidence from granites in the central segment of North Qilian, NW China[J]. Geology in China, 2006, 33(6): 1197~1208. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200606003.htm
[7]	吴才来, 郜源红, 吴锁平, 等.柴北缘西段花岗岩锆石SHRIMP U-Pb定年及其岩石地球化学特征[J].中国科学D辑:地球科学, 2008, 38(8): 930~949. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200808002.htm WU Cai-lai, GAO Yuan-hong, WU Suo-ping, et al. Zircon SHRIMP U-Pb dating of granite and its lithogeochemical characteristics in western segment of north margin of Qaidam Basin[J]. Science in China Series D: Earth Science, 2008, 38(8): 930~949. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200808002.htm
[8]	吴才来, 徐学义, 高前明, 等.北祁连早古生代花岗质岩浆作用及构造演化[J].岩石学报, 2010, 26(4): 1027~1044. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201004004.htm WU Cai-lai, XU Xue-yi, GAO Qian-ming, et al. Early Palaezoic grranitoid magmatism and tectonic evolution in North Qilian, NW China[J]. Acta Petrologica Sinica 2010, 26(4): 1027~1044. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201004004.htm
[9]	许志琴, 杨经绥, 李海兵, 等.造山的高原——青藏高原的地体拼合、碰撞造山及隆升机制[M].北京:地质出版社.2007. XU Zhi-qin, YANG Jing-sui, LI Hai-bing, et al. An orogenic plateau: Terrain tectonics, collisional orogenesis, and rising mechanisms of the Qinghai-Tibet Plateau[M]. Beijing: Geological Publishing House, 2007.
[10]	何世平, 李荣社, 王超, 等.南祁连东段化隆岩群形成时代的进一步限定[J].岩石矿物学杂志, 2011, 30(1): 34~44. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201101006.htm HE Shi-ping, LI Rong-she, WANG Chao, et al. The further age constraint of Hualong Rock Group in the eastern segment of South Qilian Mountains[J]. Acta Petrologica et Mineralogica, 2011, 30(1): 34~44. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201101006.htm
[11]	青海省地质局. 中华人民共和国区域地质调查报告——快日玛乡幅(1: 20万)[R]. 西宁: 青海省地质局, 1976. Qinghai Geology Bureau. Regional geological surveying report of the People's Republic of China: Kuairima area (1:200000)[R]. Xining: Qinghai Geology Bureau, 1976.
[12]	青海省地质局. 中华人民共和国区域地质调查报告——德令哈幅(1: 20万)[R]. 西宁: 青海省地质局, 1978. Qinghai Geology Bureau. Regional geological surveying report of the People's Republic of China: Delingha area (1:200000)[R]. Xining: Qinghai Geology Bureau, 1978.
[13]	黄瑞华.祁连山地区大地构造演化及其性质特征[J].大地构造与成矿学, 1996, 20(2): 95~104. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK602.000.htm HUANG Rui-hua. Geotectonic evolution and its characteristics in Qilianshan Region[J]. Geotectonical et Metallogenia, 1996, 20(2): 95~104. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK602.000.htm
[14]	李怀坤, 耿建珍, 郝爽, 等.用激光烧蚀多接收器等离子体质谱仪(LA-MC-ICPMS)测定锆石U-Pb同位素年龄的研究[J].矿物学报, 2009, 29(z1): 600~601. doi: 10.3321/j.issn:1000-4734.2009.z1.311 LI Huai-kun, GENG Jian-zhen, HAO Shuang, et al. Study on zircon U-Pb isotopic dating by LA-MC-ICPMS[J]. Acta Mineralogica Sinica, 2009, 29(z1): 600~601. doi: 10.3321/j.issn:1000-4734.2009.z1.311
[15]	Gao Shan, Liu Xiao-ming, Yuan Hong-lin. Analysis of forty_two major and trace elements of USGS and NIST SRM Glasses by LA-ICP-MS[J]. Geostand News, 2002, 22:181~19.
[16]	甘肃省地质矿产局.青海省岩石地层[M].武汉:中国地质大学出版社, 1997. Bureau of Geology and Mineral Resources of Gansu Province. Litho strata in Qinghai Province[M]. Wuhan: China University of Geosciences Press, 1997.