黄金科学技术 ›› 2019, Vol. 27 ›› Issue (1): 1-14.doi: 10.11872/j.issn.1005-2518.2019.01.001
• • 下一篇
Ke HAN1,Le AN1,Xingke YANG1,2,*(),Shuwen LIU1,2
摘要:
汉阴黄龙金矿大地构造位置处于南秦岭构造带内,矿区内岩石受多期构造变形变质作用,并叠加有稍晚期岩浆活动。金矿化类型以蚀变岩型为主,其次为石英脉型,矿化受脆—韧性剪切带和围岩蚀变的控制,主要蚀变类型有黑云母变斑晶化、黄铁矿化、碳化和石榴石化。为查明构造—蚀变与成矿之间的关系,通过主量元素聚类分析法和因子分析法进一步确认韧性剪切带中的脆性断层破碎带是矿区内主要的控矿构造,黑云母变斑晶化蚀变与金矿化关系最密切,并通常与黄铁矿化叠加出现,对成矿有利;蚀变岩型金矿石与硅化相关性不大。金相关成矿元素Q型聚类分析、R型聚类分析和因子分析结果表明,金成矿作用可能贯穿于脆—韧性剪切作用和岩浆活动的整个过程,受多期热液叠加和后期岩浆热液活动的影响。因此,黄龙金矿属于脆—韧性剪切带型金矿,并可能受后期岩浆热液叠加再富集。
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