| 西藏打加错南北向地堑系的形成特征及其与成矿的关系 |
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| 引用本文： | 龚臣,彭建华,黄韶春,赵希良.西藏打加错南北向地堑系的形成特征及其与成矿的关系[J].火山地质与矿产,2013(4):249-256. |
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| 作者姓名： | 龚臣 彭建华 黄韶春 赵希良 |
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| 作者单位： | 江西省地矿局九一五地质大队,南昌330002 |
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| 基金项目： | 中国地质调查局地质调查项目＂西藏打加错地区4幅区调＂（项目编码：1212011086038）资助. |
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| 摘 要： | 西藏打加错南北向地堑系处于冈瓦纳大陆北缘,地堑系总体延伸方向（175～190°）,延伸长度＞50 km,延伸宽度5～15 km.根据该地堑构造带内发育的鱼鳞山组（N2Qy）玄武岩测年结果以及地堑构造带内发育的活动温泉,判断该地堑构造活动时期早于13.43 Ma,现今仍在强烈活动.在打加错地堑系东西两侧的地垒中共发现5处金属矿（化）点,各矿（化）点与中酸性岩体活动及近SN断裂构造有密切关系,特别是近南北向展布的中酸性小岩体更易形成斑岩型铜矿.
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| 关 键 词： | 地堑 地垒 打加错 西藏 |
Formation characteristics and relationship with mineralization for the S-N-trending graben system in Dajiacuo area,Qinghai-Tibetan plateau |
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| GONG Chen,PENG Jian-hua,HUANG Shao-chun,ZHAO Xi-liang.Formation characteristics and relationship with mineralization for the S-N-trending graben system in Dajiacuo area,Qinghai-Tibetan plateau[J].Volcanology & Mineral Resources,2013(4):249-256. |
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| Authors: | GONG Chen PENG Jian-hua HUANG Shao-chun ZHAO Xi-liang |
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| Institution: | (No. 915 Geology Party ,jiangxi Bureau of Geology and Mineral Resources, Nanchang,331202 ,China) |
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| Abstract: | The S-N trending graben system in Dajiacuo area, Qinghai-Tibetan plateau, is located in the northern margin of Gondwana with extension direction of 175-190;, extension length;50 km and extension width of 5-15 km. According to the dating results of basalts in Yulinshan Formation and activities hot-springs de- veloped in the graben tectonic belt, it is considered that the tectonic activity of the graben is earlier than 13.43 Ma and the strong activity is still undergoing up to now. Five metallic mineral occurrences are found in the horsts developed in the eastern and western side of the Dajiacuo graben system, showing a close re- lationship of mineralization with intermediate-acid rocks and S-N-trending fault, especially those S-N-tren- ding intermediate-acid minor-intrusions are more favourable for forming porphyry copper deposits. |
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| Keywords: | graben horst Dajiacuo area Tibet |
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