| 江苏宁芜北段自然重砂异常特征及其对铜金矿的响应 |
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| 引用本文： | 杨用彪,黄顺生,黄建平,王季顺,朱静苹,郭治东.江苏宁芜北段自然重砂异常特征及其对铜金矿的响应[J].地质通报,2014,33(12):1961-1967. |
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| 作者姓名： | 杨用彪 黄顺生 黄建平 王季顺 朱静苹 郭治东 |
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| 作者单位： | 江苏省地质调查研究院，江苏 南京 210049 |
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| 基金项目： | 中国地质调查局项目(编号:1212010881615) |
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| 摘 要： | 宁芜火山岩盆地是长江中下游成矿带中重要的铁、硫、铜、金成矿区。基于宁芜北段自然重砂建库数据,通过ZSAPS2.0软件GIS平台,选择与火山热液充填型铜金矿相关的特征矿物,圈定了自然重砂组合异常。通过自然重砂组合异常特征发现,铜矿物(黄铜矿、斑铜矿、蓝铜矿、辉铜矿、孔雀石)、自然金、黄铁矿、重晶石等重矿物组合对火山热液充填型铜金矿响应明显。在组合异常的基础上,圈定自然重砂综合异常,以成矿地质条件、与已知矿床的对应关系、异常强度、异常规模、重砂异常套合程度等为指标,对综合异常进行评价,从而为宁芜火山岩盆地北段铜金矿找矿远景区的划定提供依据。
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| 关 键 词： | 宁芜北段 自然重砂 铜金矿 火山热液型 找矿远景区 |
Natural heavy mineral anomaly characteristics in the northern segment of Ning-Wu area, Jiangsu Province, and their response to copper-gold deposits |
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| YANG Yong-biao,HUANG Shun-sheng,HUANG Jian-ping,WANG Ji-shun,ZHU Jing-ping,GUO Zhi-dong.Natural heavy mineral anomaly characteristics in the northern segment of Ning-Wu area, Jiangsu Province, and their response to copper-gold deposits[J].Geologcal Bulletin OF China,2014,33(12):1961-1967. |
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| Authors: | YANG Yong-biao HUANG Shun-sheng HUANG Jian-ping WANG Ji-shun ZHU Jing-ping GUO Zhi-dong |
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| Institution: | Geological Survey of Jiangsu Province, Nanjing 210049, Jiangsu, China |
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| Abstract: | The Ning-Wu volcanic basin is one of the important iron-sulfur-copper-gold ore concentration areas in the middle-lower Yangtze River metallogenic belt. The study is based on the database of natural heavy mineral survey in the northern segment of the Ning-Wu basin. Based on ZSAPS2.0 software and GIS platform, the authors selected characteristic minerals related to volcanic hydrothermal filling type copper-gold deposits and delineated natural heavy mineral combinatorial anomalies. It is found that heavy mineral assemblages composed of such minerals as copper minerals (chalcopyrite, bornite, azurite, chalcocite, malachite), native gold, pyrite, barite respond obviously to volcanic hydrothermal filling type copper-gold deposits. Moreover, the authors delineated composite anomalies of natural heavy minerals according to anomaly combination. The composite anomalies were evaluated by ore-forming geological conditions, the corresponding relations of the known deposits, anomaly intensity, anomaly dimensions, and conformity extent of natural anomalies. The results achieved by the authors provide some evidence for dividing copper-gold prospecting areas in the northern segment of the Ning-Wu volcanic basin. |
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| Keywords: | northern segment of Ning-Wu basin natural heavy mineral copper-gold deposit volcanic hydrothermal type prospect area |
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