西藏昂青银多金属矿床地质特征及成矿规律
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摘要
采用野外调查结合室内测试手段,研究并总结了西藏昂青银多金属矿床地质特征和成矿规律。结果表明:西藏昂青银多金属矿床产于三江成矿带中段玉龙铜矿带莽总斑岩铜矿外围,为接触交代夕卡岩型银、铅、锌、铜多金属矿床。该矿床成矿元素具有明显的分带性,浅部为Pb、Ag元素,向深部逐渐过渡为Pb、Cu、Zn元素。该矿床成矿年龄为(37.6±0.2)Ma,为印度—亚洲大陆碰撞造山带晚碰撞阶段挤压—伸展构造背景下成矿作用的产物,成矿与莽总斑岩体有关。
The deposit characteristics and metallogenic regularity of the Angqing silver polymetallic deposit in Tibet are summarized based on the field investigation and laboratory analysis. The results show that the deposit is located near Mangzong porphyry copper deposit in the Yulong copper ore belt in the Nujiang-Lancang-Jinsha rivers area. The deposit belongs to a contact metasomatic skarn type polymetallic Ag-Pb-Zn-Cu deposit. The ore-forming elements show a zonality invertically as followings: Pb-Ag in upper part,and Pb,Cu,Zn in the depth. The ore-forming age was about( 37.6±0.2) Ma,so the deposit was formed in the later collision period of the India-Asia continental collision orogenic belts,where in the compression-extension tectonic setting. The ore-forming was related to the Mangzong pophyry.
The deposit characteristics and metallogenic regularity of the Angqing silver polymetallic deposit in Tibet are summarized based on the field investigation and laboratory analysis. The results show that the deposit is located near Mangzong porphyry copper deposit in the Yulong copper ore belt in the Nujiang-Lancang-Jinsha rivers area. The deposit belongs to a contact metasomatic skarn type polymetallic Ag-Pb-Zn-Cu deposit. The ore-forming elements show a zonality invertically as followings: Pb-Ag in upper part,and Pb,Cu,Zn in the depth. The ore-forming age was about( 37.6±0.2) Ma,so the deposit was formed in the later collision period of the India-Asia continental collision orogenic belts,where in the compression-extension tectonic setting. The ore-forming was related to the Mangzong pophyry.
引文
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[17]Liang Hua-ying,Yu Heng-xiang,Mo Ji-hai,Zhang Yu-quan,Xie Ying-wen.Zircon LA-ICP-MS U-Pb age,Ce4+/Ce3+ratios and the geochemical features of the Machangqing complex associated the copper deposit[J].Chinese Journal of Geochemistry,2006,25(3):223-229.
[18]梁华英,莫济海,孙卫东,张玉泉,曾提,胡光黔,Charllote M A.玉龙铜矿带马拉松多斑岩体岩石学及成岩成矿系统年代学分析[J].岩石学报,2009,25(2):385-392.
[2]赵路通,王京彬,王玉往.夕卡岩型矿床研究现状[J].矿产勘查,2016,7(1):141-148.
[3]西藏自治区地质矿产勘查开发局.西藏区域地质志[M].北京:地质出版社,1993:1-707.
[4]唐仁鲤,罗怀松.西藏玉龙斑岩铜(钼)矿带地质[M].北京:地质出版社,1995:1-294.
[5]陈建平,唐菊兴,从源,董庆吉,郝金华.藏东玉龙斑岩铜矿地质特征及成矿模型[J].地质学报,2009,82(12):1887-1900.
[6]杨日红,于学政.藏东三江地区多金属矿产遥感信息综合找矿预测[J].地质与勘探,2005,41(3):0059-0064.
[7]白涛,樊炳良,冯德新.藏东八宿县错纳铅银矿地质特征及找矿标志[J].有色金属工程,2016,6(3):68-72.
[8]伍静,梁华英,莫技海,张玉泉,胡光黔.玉龙斑岩铜矿带莽总含矿斑岩体岩石学特征及锆石U-Pb年龄研究[J].大地构造与成矿学,2011,35(4):300-306.
[9]张玉泉,谢应雯,梁华英,邱华宁,李献华,钟孙霖.藏东玉龙铜矿带含矿斑岩及成岩系列[J].地球化学,1998,27(3):236-243.
[10]侯增谦,莫宣学,杨志明,王安建,潘桂棠,曲晓明,聂凤军.青藏高原碰撞造山带成矿作用:构造背景、时空分布和主要类型[J].中国地质,2006,33(2):348-359.
[11]侯增谦,王二七,莫宣学,丁林,潘桂棠,张中杰.青藏高原碰撞造山与成矿作用[M].北京:地质出版社,2008:565-601.
[12]侯增谦.大陆碰撞成矿论[J].地质学报,2010,84(1):30-58.
[13]秦克章,夏代祥,李光明,肖波,多吉,蒋光武,赵俊兴.西藏驱龙斑岩-夕卡岩铜钼矿床[M].北京:科学出版社,2014:1-361.
[14]肖波,秦克章,李光明,李金祥,陈雷,赵俊兴,范新.冈底斯驱龙斑岩铜-钼矿区外围矽卡岩型铜矿的分布、特征及深部找矿意义[J].地质与勘探,2011,47(1):0043-0053.
[15]李光明,刘波,屈文俊,林方成,佘宏全,丰成友.西藏冈底斯成矿带的斑岩-矽卡岩成矿系统——来自斑岩矿床和矽卡岩型铜多金属矿床的Re-Os同位素年龄证据[J].大地构造与成矿学,2005,29(4):482-490.
[16]梁华英,莫济海,孙卫东,喻亨祥,张玉泉,Charllote M A.藏东玉龙超大型斑岩铜矿床成岩成矿系统时间跨度分析[J].岩石学报,2008,24(10):2352-2358.
[17]Liang Hua-ying,Yu Heng-xiang,Mo Ji-hai,Zhang Yu-quan,Xie Ying-wen.Zircon LA-ICP-MS U-Pb age,Ce4+/Ce3+ratios and the geochemical features of the Machangqing complex associated the copper deposit[J].Chinese Journal of Geochemistry,2006,25(3):223-229.
[18]梁华英,莫济海,孙卫东,张玉泉,曾提,胡光黔,Charllote M A.玉龙铜矿带马拉松多斑岩体岩石学及成岩成矿系统年代学分析[J].岩石学报,2009,25(2):385-392.