| 西秦岭党川地区花岗岩体的"解体"及同位素年龄证据 |
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| 引用本文： | 李永军,李锁成,杨俊泉,刘静,温志亮,杨忠民.西秦岭党川地区花岗岩体的"解体"及同位素年龄证据[J].矿物岩石地球化学通报,2005,24(2):114-120. |
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| 作者姓名： | 李永军 李锁成 杨俊泉 刘静 温志亮 杨忠民 |
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| 作者单位： | 1. 长安大学,地球科学与国土资源学院,西安,710054
2. 甘肃省地质矿产勘查开发局,地质一院,甘肃,天水,741020 |
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| 基金项目： | 中国地质调查局地质调查资助项目(20001300010171) |
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| 摘 要： | 复式花岗岩体(岩基)的“解体”是客观地质事实的反映。通过详细的岩石学特征、接触关系、形变及变质特征研究．西秦岭党川地区的花岗岩体可解体为吴砦、太碌、大堡、石门、党川、火炎山、百花7个岩体。其同位素年龄依次为174Ma、212Ma、225Ma、280Ma、391Ma、399Ma和430Ma。近年来的地质填图已经证实．各岩体间均为侵入接触关系．解体地质依据充分。岩体的解体反映了岩浆活动的特征,对进一步研究岩浆事件、成矿事件和构造演化有重要的意义。
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| 关 键 词： | 同位素年龄 花岗岩体 西秦岭 解体 证据 接触关系 岩石学特征 特征研究 地质依据 地质填图 岩浆活动 岩浆事件 构造演化 岩基 成矿 |
| 文章编号： | 1007-2802(2005)02-0114-07 |
| 修稿时间： | 2004年10月15 |
The "Disintergration" of Granite Bodies in the Dangchuan Area of Western Qinling: Evidence from the Isotopic Dating Ages |
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| LI Yong-jun,LI Suo-cheng,YANG Jun-quan,LIU Jing,WEN Zhi-liang,YANG Zhong-min.The "Disintergration" of Granite Bodies in the Dangchuan Area of Western Qinling: Evidence from the Isotopic Dating Ages[J].Bulletin of Mineralogy Petrology and Geochemistry,2005,24(2):114-120. |
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| Authors: | LI Yong-jun LI Suo-cheng YANG Jun-quan LIU Jing WEN Zhi-liang YANG Zhong-min |
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| Institution: | LI Yong-jun,LI Suo-cheng,YANG Jun-quan,LIU Jing,WEN Zhi liang,YANG Zhong-min School of Earth Science and Land Resources,Chang'an University,Xi'an 710054,China, No. 1 Geology Exploration Institute,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Tianshun 741020. China |
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| Abstract: | The"dismtergration"of the multi-stage granitic batholiths (bodies) are the fundamental condition for objectively reflec-ting the geological facts. The detailed study on petrology, contact relationship, deformation, and metamorphism of granitic bodies shows that the granite bodies in the Dangchuan area could be disinlergrated into 7 intrusive bodies of Wucar. Tailu. Dabu, Shimon, Dangchuan. Huoyanshan and Baihua, with isotopic dating ages of 174 Ma, 212 Ma, 225 Ma, 280 Ma, 391 Ma, 399 Ma and 430 Ma respectively, deological mapping in recent years confirmed that there are intrusive contact relationships among these bodies. Besides the geological evidences, the isotopic dating ages of these bodies have shown the same paragenetic relation ships among these granitic bodies. The disintergration of these intrusive bodies has shown the geological features and facts of magmatic movements in the area, and has established a good fundament for further study on magmalic movements, ore-forming events, and tectonic evolutions in the area. |
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| Keywords: | the granite bodies petrology contact relationship disintergration isotopic dating age Dangchuan area western Qinling |
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