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湘南柿竹园矿田云英岩型钨多金属成矿规律及成矿预测

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湘南柿竹园矽卡岩型-云英岩型钨多金属矿田是中国最重要的钨多金属矿产资源基地之一.前人对该矿田的矽卡岩型成矿开展了系统的研究,而对矿田内云英岩型钨矿化研究薄弱,制约了矿田内成矿理论的认识和矿产勘查部署.通过野外调查,文章系统总结了矿田内云英岩型矿化样式、空间分布、矿化特征和控矿因素.研究显示柿竹园矿田内云英岩型矿体包含 4 种矿化样式:第一期斑状黑云母花岗岩中云英岩型矿体、石英斑岩中云英岩型矿体、第二期黑云母花岗岩中云英岩型矿体和矽卡岩-网脉状云英岩复合型矿体.这 4 种样式的云英岩型钨多金属矿体是柿竹园矿田内不同阶段的花岗岩成矿的产物.白钨矿化学成分显示矽卡岩型矿化的白钨矿低Mo,而云英岩型矿化白钨矿富Mo,指示云英岩矿化较矽卡岩矿化具有更氧化的环境.柿竹园矿田矿化格局显示云英岩型矿化受矿田和矿床尺度的花岗岩体侵位前锋控制,矿田尺度表现为岩体由北东深部向南西浅部侵位,千里山岩体南部为岩体侵位的前锋,岩体南部发育较大规模的云英岩矿体;矿床尺度上,云英岩体的定位受控于花岗岩岩突的控制.此外,矿田菱形格状构造对岩突产出位置具有重要的控制作用,也具有重要勘查指示意义.结合矿田控矿构造格局、不同期次岩浆岩对云英岩的控制及地球化学异常特征,笔者提出了大吉岭、柿竹园深部和柴山深部3 处云英岩型钨多金属矿找矿预测靶区.
Metallogenic regularity and prediction of tungsten-polymetallic greisen mineralization in Shizhuyuan orefield in South Hunan
The Shizhuyuan skarn-greisen tungsten-polymetallic orefield in South Hunan is one of the most important tungsten-polymetallic mineral resource bases in China.The skarn mineralization has received extensive research,whereas the greisen mineralization has gained a little attention,limiting our understanding of ore formation and mineral exploration in the orefield.The mineralization style,spatial distribution,geological features,and ore con-trol factors of the tungsten-polymetallic greisen were systematically summarized based on field investigation.This study shows that the greisen orebodies in the Shizhuyuan orefield include four styles:greisen hosted in 1st stage porphyritic biotite granite,greisen hosted in quartz porphyry,greisen hosted in 2nd stage biotite granite,and skarn-veinlet greisen composite type.These greisen tungsten polymetallic orebodies are the products of different evolution stages of granite and different mineralization patterns in the Shizhuyuan orefield.Chemical composi-tions of scheelite show that scheelite grains in skarn have low Mo,while scheelite grains in greisen are enriched in Mo,which may suggest that the greisen mineralization experienced a more oxidized environment than skarn.The mineralization framework in the Shizhuyuan shows that the greisen-type mineralization was controlled by the striker of granitic intrusion at orefield-and deposit-scale.On orefield-scale,the Qianlishan granite intruded from the deep North-East to the shallow South-West.The Qianlishan intrusion's southern section has more inten-sive mineralization than the other regions,making it stand out.On deposit-scale,the location of greisen minera-lization was controlled by outshoot of granitic intrusion.In addition,rhombus lattice structure has a significant controlling influence on the emplacement position of intrusion and mineralization in the orefield,which is also important for generating exploration targets.Combining the structural framework,relationship between stages of intrusion and greisen mineralization,and geochemical anomalies of the Shizhuyuan orefield,three greisen mine-ralization exploration targets are proposed,the Dajiling target and deep targets of Shizhuyuan and Chaishan.

tungsten-polymetallic greisenmineralization typeore-controlling factorsmetallogenic predic-tionShizhuyuan orefieldSouth Hunan

侯宇辰、刘建平、AHMAD Osama、王浩、李岩林、王周元、吴佳锟、田旭峰、文一卓

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中南大学地球科学与信息物理学院,湖南长沙 410083

湖南柿竹园有色金属有限责任公司,湖南郴州 423037

湖南省矿产资源调查所,湖南长沙 410000

云英岩型钨多金属矿床 矿化类型 控矿因素 成矿预测 柿竹园矿田 湘南

国家重点研发计划国家重点研发计划国家自然科学基金

2022YFC29051012018YFC060390341872091

2024

10.16111/j.0258-7106.2024.01.010

矿床地质
中国地质学会矿床地质专业委员会 中国地质科学院矿床地质研究所

矿床地质

CSTPCD北大核心
影响因子：2.163
ISSN：0258-7106
年,卷(期)：2024.43(1)
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