内蒙古朱拉扎嘎金矿床成矿特征及其与穆龙套型金矿床的异同性
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摘要
内蒙古朱拉扎嘎金矿床是一个低品位、规模大,并具有细脉-微细脉浸染和蚀变特征的金矿床.矿床赋存于中新元古代沉积变质岩中,受层间破碎带的控制.矿石矿物组成有金属硫化物石英、长石,少量方解石、黏土矿.金以晶隙金为主,成矿溶液主要来自岩浆热液活动,成矿温度平均在286℃,成矿物质来源既有赋矿地层的提供,也有深部物质的参与.该矿床在成矿地质背景、赋矿岩石、矿化形成、矿物组合和成矿作用等方面均与穆龙套型金矿床具有可对比性.
The Zhulazaga gold deposit in Inner Mongolia is characterized by large reserves,low grade and intense alteration and dissemination of veinlet and micro-veinlet. The deposit occurs in the Meso-Neoproterozoic sedimentary metamorphic rocks,controlled by interlayer fracture zones. Sulfides are the dominant ore minerals,with quartz,feldspar and minus calcite and clay minerals. The gold is mainly of intercrystalline. The ore-forming fluid is derived mainly from magmatic hydrothermal activities,with average temperature of 286 ℃. The ore materials are originated mainly from the host strata and partially from the deep. As for its geological setting,ore-hosting rock,metallogenesis and mineral assemblage,the Zhulazaga gold deposit is comparable with the Muruntau gold deposit.
The Zhulazaga gold deposit in Inner Mongolia is characterized by large reserves,low grade and intense alteration and dissemination of veinlet and micro-veinlet. The deposit occurs in the Meso-Neoproterozoic sedimentary metamorphic rocks,controlled by interlayer fracture zones. Sulfides are the dominant ore minerals,with quartz,feldspar and minus calcite and clay minerals. The gold is mainly of intercrystalline. The ore-forming fluid is derived mainly from magmatic hydrothermal activities,with average temperature of 286 ℃. The ore materials are originated mainly from the host strata and partially from the deep. As for its geological setting,ore-hosting rock,metallogenesis and mineral assemblage,the Zhulazaga gold deposit is comparable with the Muruntau gold deposit.
引文
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(1)张道阔,等.内蒙古自治区阿拉善左旗朱拉扎嘎矿区金矿勘探报告.2015.
[2]张道阔,王庆超,秦向红,等.内蒙古朱拉扎嘎金矿构造、岩浆控矿作用[J].地质与资源,2016,25(2):125-129.
[3]杨岳清,张建华,刘妍,等.内蒙古朱拉扎嘎金矿床中火山岩的发现[J].中国地质,2001,28(9):13-19.
[4]江思宏,杨岳清,聂凤军,等.内蒙古朱拉扎嘎金矿矿产地质特征[J].矿床地质,2001,20(3):234-242.
[5]李俊键.内蒙古阿拉善地块区成矿系统[D].北京:中国地质大学,2006.
[6]江思宏,杨岳清,聂凤军,等.阿拉善地区朱拉扎嘎金矿床硫、铅同位素研究[J].地质评论,2001,47(4):438-445.
[7]聂凤军,江思宏,张义,等.中蒙边境中东段金属矿床形成规律和找矿方向[M].北京:地质出版社,2007:98-116.
[8]刘家军,郑明华,龙训荣,等.新疆萨瓦亚尔顿金矿床成矿特征及其与穆龙套型金矿床的异同性[J].矿物学报,2002,22(1):54-59.
[9]杨喜安,田飞,李大鹏,等.穆龙套金矿构造、岩浆控矿作用[J].新疆地质,2010,28(3):285-289.
[10]鲍庆中,沙德铭,王宏,等.也谈南天山古生代造山带内穆龙套型金矿床的控矿因素和找矿方向[J].地质与资源.2003,12(3):159-165.
(1)张道阔,等.内蒙古自治区阿拉善左旗朱拉扎嘎矿区金矿勘探报告.2015.