ZIRCON U-Pb DATING OF THE RHYOLITE-DACITE PORPHYRY IN THE SANDAOWAN OF EAST KUNLUN MOUNTAINS AND ITS GEOLOGICAL SIGNIFICANCE

ZHOU Chun-jing; HU Dao-gong; BAROSH P J; WU Zhen-han; ZHANG Yong-qing; GENG Jian-zhen; HAO Shuang; NI Jin-yu; ZHANG Yao-ling

2010 Vol. 16, No. 1

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Article navigation > Journal of Geomechanics > 2010 > 16(1): 28-35

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ZHOU Chun-jing, HU Dao-gong, BAROSH P J, WU Zhen-han, ZHANG Yong-qing, GENG Jian-zhen, HAO Shuang, NI Jin-yu, ZHANG Yao-ling. ZIRCON U-Pb DATING OF THE RHYOLITE-DACITE PORPHYRY IN THE SANDAOWAN OF EAST KUNLUN MOUNTAINS AND ITS GEOLOGICAL SIGNIFICANCE[J]. Journal of Geomechanics, 2010, 16(1): 28-35.

Citation:

ZIRCON U-Pb DATING OF THE RHYOLITE-DACITE PORPHYRY IN THE SANDAOWAN OF EAST KUNLUN MOUNTAINS AND ITS GEOLOGICAL SIGNIFICANCE

1.
Institute of Geomechanics, Chinese Academy of Geological Science, Beijing 100081, China
2.
P J Barosh and Associates, 103 Aaron Avenue, Bristol, R1 02809, USA
3.
Chinese Academy of Geological Sciences, Beijing 100037, China
4.
Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China

Received Date: 04 December 2009

Publish Date: 25 March 2010

Abstract

Abstract

The Sandaowan rhyolite-dacite porphyry, located to the west of the Golmud River, about 55 km from south of Golmud City, is an intrusive vein of volcanic craters. It intruded into the clastic rocks, named Habalayigou group as one of the Nachitai unit in this region. A sample No. B727-1 was collected from the Sandaowan rhyolite-dacite porphyry rock. We used the LA-MC-ICPMS method of Zircon U-Pb Dating in this article. The 25 zircons from No. B727-1 yield a mean value of (425.9 ± 2.6) Ma of ²⁰⁶Pb/²³⁸U, which is interpreted as the age of the volcanism. The result shows that the volcanic crater was one of the eruptive center during Late collision of the Early Paleozoic in this region. Besides, it reveals a low time restrict to the Habalayigou group, implying that the Habalayigou strata formed before the Middle Silurian. These results conflict with previous ⁴⁰Ar/³⁹Ar whole rock ages of 147.96Ma for the rhyolite-dacite porphyry from the same rock.
- rhyolite-dacite porphyry /
- zircon U-Pb dating /
- Middle Silurian /
- eastern Kunlun orogenic belt

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References

[1]	姜春发, 杨经绥, 冯秉贵, 等.昆仑开合构造[M].北京:地质出版社, 1992. Google Scholar JIANG Chun-fa, YANG Jing-sui, FENG Bing-gui, et al. Opening-closing tectonics of Kunlun[M]. Beijing: Geological Publishing House, 1992. Google Scholar
[2]	潘裕生, 周伟明, 许荣华, 等.昆仑早古生代地质特征与演化[J].中国科学(D辑), 1996, 26(4) : 302~307. Google Scholar PAN Yu-sheng, ZHOU Wei-ming, XU Rong-hua, et al. Early Paleozoic geological characteristics and evolution of Kunlun Mountains[J]. Science in China (Series D), 1996, 26(4) : 302~307. Google Scholar
[3]	潘桂堂, 陈智梁, 李兴振, 等.东特提斯地质构造形成演化[M].北京:地质出版社, 1997. Google Scholar PAN Gui-tang, CHEN Zhi-liang, LI Xing-zhen, et al. Geological-tectonic evolution in the eastern Tethys[M]. Beijing: Geological Publishing House, 1997. Google Scholar
[4]	郭正府, 邓晋福, 许志琴, 等.青藏东昆仑晚古生代末-中生代中酸性火成岩与陆内造山过程[J].现代地质, 1998, 12(3) : 344~352. Google Scholar GUO Zheng-fu, DENG Jin-fu, XU Zhi-qin, et al. Late Palaeozoic-Mesozoic intracontinental orogenic process and intermediate-acidic igneous rocks from the eastern Kunlun Mountains of northwestern China[J]. Geoscience, 1998, 12(3) : 344~352. Google Scholar
[5]	李荣社, 计文化, 赵振明, 等.昆仑早古生代造山带研究进展[J].地质通报, 2007, 26(4) : 373~381. Google Scholar LI Rong-she, JI Wen-hua, ZHAO Zhen-ming, et al. Progress in the study of the Early Paleozoic Kunlun orogenic belt[J]. Geological Bulletin of China, 2007, 26(4) : 373~382. Google Scholar
[6]	许志琴, 杨经绥, 李海兵, 等.造山的高原——青藏高原地体的拼合、碰撞造山及隆升机制[M].北京:地质出版社, 2007. 1~458. Google Scholar XU Zhi-qin, YANG Jing-sui, LI Hai-bing, et al. Orogenic plateau: Terrane amalgamation, collision and uplift in the Qinghai-Tibet Plateau[M]. Beijing: Geological Publishing House, 2007. 1~458. Google Scholar
[7]	张雪亭, 杨生德.青海省区域地质概论[M].北京:地质出版社, 2007. 36~39. Google Scholar ZHANG Xue-ting, YANG Sheng-de. Regional geological conspectus of Qinghai Province[M]. Beijing: Geological Publishing House, 2007. 36~39. Google Scholar
[8]	边千韬, Pospelov I I, 李惠民, 等.青海省布青山早古生代末期埃达克岩的发现及其构造意义[J].岩石学报, 2007, 23(5) : 925~934. Google Scholar BIAN Qian-tao, Pospelov I I, LI Hui-min, et al. Discovery of the end of Early Paleozoic adakite in the Buqingshan area, Qinghai Province, and its tectonic implications[J]. Acta Petrologica Sinica, 2007, 23(5) : 925~934. Google Scholar
[9]	李继亮, 孙枢, 郝杰, 等.碰撞造山带的碰撞事件时限的确定[J].岩石学报, 1999, 15(2) : 315~320. Google Scholar LI Ji-liang, SUN Shu, HAO Jie, et al. Time limit of collision event of collision orogens[J]. Acta Petrologica Sinica, 1999, 15(2) : 315~320. Google Scholar
[10]	倪晋宇, 胡道功, 周春景.东昆仑造山带纳赤台群形成的大地构造环境探讨[J].地质力学学报, 2010, 16(1) : 11~20. Google Scholar NI Jin-yu, HU Dao-goGU Feng-bao. Geological characteristics of east Kunlun and tectonic evolution inic environment of Naij Tal Group, East Kunlun Orogenic Belt[J]. Journal of Geomechanics, 2010, 16(1) : 11~20. Google Scholar
[11]	陆露, 胡道功, 张永清, 等.昆中断裂带同构造花岗斑岩锆石U-Pb年龄及其构造意义[J].地质力学学报, 2010, 16(1) : 36~43. Google Scholar LU Lu, HU Dao-gong, ZHANG Yong-qing, et al. Ziron U-Pb age for syntectoin granitic porphyry and its teceonic significance in the middle Kunlun fallt belt[J]. Journal of Geomechanics, 2010, 16(1) : 36~43. Google Scholar
[12]	吴芳, 张绪教, 张永清, 等.东昆仑闹仓坚沟组流纹质凝灰岩锆石U-Pb年龄及其地质意义[J].地质力学学报, 2010, 16(1) : 44~50. Google Scholar WU Fang, ZHANG Xu-jiao, ZHANG Yong-qing, et al. Zircon U-Pb ages for rhyolite tuff of the Naocangjiangou Formation in the east Kulun orogenic belt and their implication[J]. Journal of Geomechanics, 2010, 16(1) : 44~50. Google Scholar
[13]	张紫程, 张绪教, 高万里, 等.东昆仑左行韧性剪切带形成时代的锆石U-Pb年龄证据[J].地质力学学报, 2010, 16(1) : 51~58. Google Scholar ZHANG Zi-cheng, ZhANG Xu-jiao, GAO Wan-li, et al. Evidence of zircon U-Pb ages for the formation time of the east Kunlun left-lateral ductile shear belt[J]. Journal of Geomechanics, 2010, 16(1) : 51~58. Google Scholar
[14]	张耀玲, 张绪教, 胡道功, 等.东昆仑造山带纳赤台群流纹岩SHRIMP锆石U-Pb年龄[J].地质力学学报, 2010, 16(1) : 21~27, 50. Google Scholar ZHANG Yao-ling, ZHANG Xu-jiao, HU Dao-gong, et al. SHRIMP-based zircon U-Pb ages for rhyolite of the Naij Tal Group in the east Kulun orogenic belt[J]. Journal of Geomechanics, 2010, 16(1) : 21~27, 50. Google Scholar
[15]	薛腊梅, 赵希涛, 张耀玲, 等.遥感技术在东昆仑新生代地质填图中的应用[J].地质力学学报, 2010, 16(1) : 70~77. Google Scholar XUE La-mei, ZHAO Xi-tao, ZHANG Yao-ling, et al. Application of remote sensing technique in the east Kunlun Cenozoic geological mapping[J]. Journal of Geomechanics, 2010, 16(1) : 70~77. Google Scholar
[16]	高万里, 张绪教, 王志刚, 等.基于ASTER遥感图像的东昆仑造山带岩性信息提取研究[J].地质力学学报, 2010, 16(1) : 59~69. Google Scholar GAO Wan-li, ZHANG Xu-jiao, WANG Zhi-gang, et al. ASTER remote sensing image-based lithologic information extraction of the east Kulun orogenic belt[J]. Journal of Geomechanics, 2010, 16(1) : 59~69. Google Scholar
[17]	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-ICP MS)测定锆石U-Pb同位素年龄的研究[J].矿物岩石地球化学通报, 2009, 28卷(增刊) : 77. Google Scholar LI Huai-kun, GENG Jian-zhen, HAO Shuang, et al. Study on the LA-MC-ICP-MS technique for zircon U-Pb isotopic dating[J]. Bulletin of Mineralogy, Petrology and Geochemistry, 2009, 28(Supp.) : 77. Google Scholar
[18]	吴元保, 郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报, 2004, 49(16) : 1589~1604. doi: 10.3321/j.issn:0023-074X.2004.16.002 CrossRef Google Scholar WU Yuan-bao, ZHENG Yong-fei. Genesis of zircon and its constraints on the interpretation of U-Pb age[J]. Chinese Science Bulletin, 2004, 49(16) : 1589~1604. doi: 10.3321/j.issn:0023-074X.2004.16.002 CrossRef Google Scholar
[19]	Compston W, Williams I S, Kirschvink J L, et al. Zircon U-Pb ages for the Early Cambrian time-scale[J]. Journal of the Geological Society, 1992, 149(2) : 171~184. doi: 10.1144/gsjgs.149.2.0171 CrossRef Google Scholar