| 滇西兰坪盆地白秧坪Pb-Zn-Cu-Ag多金属矿床东矿带成矿年代学探讨 |
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| 引用本文： | 冯彩霞,刘燊,毕献武,胡瑞忠,池国祥,陈俊瑾,冯强,郭晓磊.滇西兰坪盆地白秧坪Pb-Zn-Cu-Ag多金属矿床东矿带成矿年代学探讨[J].矿床地质,2017,36(3):691-704. |
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| 作者姓名： | 冯彩霞 刘燊 毕献武 胡瑞忠 池国祥 陈俊瑾 冯强 郭晓磊 |
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| 作者单位： | 大陆动力学国家重点实验室 西北大学地质系, 陕西 西安 710069,大陆动力学国家重点实验室 西北大学地质系, 陕西 西安 710069,矿床地球化学国家重点实验室 中国科学院地球化学研究所, 贵州 贵阳 550002,矿床地球化学国家重点实验室 中国科学院地球化学研究所, 贵州 贵阳 550002,Department of Geology, University of Regina, Regina S4S 0A2, 加拿大,青海省西宁市武警黄 金第六支队, 青海 西宁 810021,大陆动力学国家重点实验室 西北大学地质系, 陕西 西安 710069,大陆动力学国家重点实验室 西北大学地质系, 陕西 西安 710069 |
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| 基金项目： | 本文得到国家自然科学基金（编号：40972071、41373028、41573022）和"973"项目（编号：2015CB452603）资助 |
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| 摘 要： | 白秧坪Pb-Zn-Cu-Ag多金属矿集区夹持于金沙江和澜沧江断裂之间,隶属兰坪盆地北部,分为东、西2个矿带。文章采用闪锌矿、方铅矿的Rb-Sr法和成矿阶段方解石的Sm-Nd法,对白秧坪Pb-Zn-Cu-Ag多金属矿床东矿带华昌山和下区五矿段进行了成矿年代厘定,获得方铅矿以及闪锌矿和方铅矿的矿物组合Rb-Sr等时线年龄为(32.8±1.5)Ma,方解石的Sm-Nd等时线年龄为(33.32±0.43)Ma。研究表明,通过对特定矿床的主要矿石矿物采用Rb-Sr法和Sm-Nd法获得的年龄在误差范围内是一致的,从而起到了相互验证的作用,并对矿床的成矿背景具有一定的指示性。通过成矿年龄的探讨,认为东矿带铅锌为主的矿化期主要产生于青藏高原东缘晚碰撞阶段(40~26)Ma,伴随印度-亚洲大陆碰撞造山,形成逆冲推覆构造和赋矿地层,控制了Pb-Zn矿床的形成和发育。该期Pb-Zn矿床与兰坪盆地金顶和西矿带Pb-Zn矿床、囊谦盆地Pb-Zn矿床和沱沱河盆地Pb-Zn矿床具有一定的可比性。
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| 关 键 词： | 地球化学 成矿年代 东矿带 Cu-Pb-Zn-Ag多金属矿床 白秧坪 兰坪盆地 滇西 |
| 收稿时间： | 2016/2/26 0:00:00 |
| 修稿时间： | 2017/4/30 0:00:00 |
An investigation of metallogenic chronology of eastern ore block in Baiyangping Pb-Zn-Cu-Ag polylmetallic ore deposit, Lanping Basin, western Yunnan Province |
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| FENG CaiXi,LIU Shen,BI XianWu,HU RuiZhong,CHI GuoXiang,CHEN JunJin,FENG Qiang and GUO XiaoLei.An investigation of metallogenic chronology of eastern ore block in Baiyangping Pb-Zn-Cu-Ag polylmetallic ore deposit, Lanping Basin, western Yunnan Province[J].Mineral Deposits,2017,36(3):691-704. |
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| Authors: | FENG CaiXi LIU Shen BI XianWu HU RuiZhong CHI GuoXiang CHEN JunJin FENG Qiang and GUO XiaoLei |
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| Institution: | State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China,State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Guiyang 550002, Guizhou, China,State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Guiyang 550002, Guizhou, China,Department of Geology, University of Regina, Regina S4S 0A2, Canada,No.6 Gold Geological Party of CAPF, Xining 810021, Qing-hai, China,State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China and State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi''an 710069, Shaanxi, China |
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| Abstract: | As one part of the northern Lanping Basin, the Baiyangping Pb-Zn-Cu-Ag polymetallic ore district is located between the Jinshajiang fault and the Lancangjiang fault. On the basis of the sphalerite/galena Rb-Sr and calcite Sm-Nd dating, this study provides preferable ore-forming ages (32.8±1.5) Ma and (33.32±0.43) Ma for the Huachangshan and Xiaquwu ore plates in Baiyangping Cu-Pb-Zn-Ag polymetallic ore district, western Yunnan Province, China. The results suggest that the Rb-Sr and Sm-Nd dating data are consistent within the error range, which, in addition, has certain instruction significance for understanding the deposit metallogenic background. Moreover, due to the age of mineralization, Pb-Zn mineralization period in eastern ore belt mainly produced between 40 Ma and 26 Ma when late collision appeared in east edge of the Qinghai-Tibet plateau. Thrust-nappe system and hosted ore strata were formed due to the collision and orogenesis between India and Asia, and then Pb-Zn ore deposits occurred. This period of Pb-Zn ore deposit can be compared with other similar deposits in Jingding, Nangqian, and Tuotuohe. |
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| Keywords: | geochemistry metallogenic chronology eastern ore block Cu-Pb-Zn-Ag polymetallic ore deposit Baiyangping Lanping Basin west Yunnan Province |
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