新疆哈密大青山金矿床成矿期构造特征及找矿方向
投稿时间:2022-07-14  修订日期:2023-06-05  点此下载全文
引用本文:潘 杰.新疆哈密大青山金矿床成矿期构造特征及找矿方向[J].地质与勘探,2023,59(5):932-945
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潘 杰 河南省小口径钻探工程技术研究中心河南郑州河南省地质矿产勘查开发局第四地质勘查院河南郑州 394233688@qq.com 
基金项目:河南省金属矿产成矿地质过程与资源利用重点实验室科技创新基金(编号:豫科创[2019]KC-04)资助
中文摘要:东天山-北山金矿集区是我国重要的金矿集区之一。近年来,该矿集区东部的大青山金矿综合运用多种勘查方法,取得了显著的找矿成果。为了查明成矿期构造特征,进一步指导找矿,通过对已取得勘查资料的综合整理及矿区成矿构造的详细观测解剖,采用野外观察与室内分析相结合、宏观与微观相结合的研究方法,对控矿结构面、成矿期的构造特征及矿体分布规律进行研究。研究表明:大青山金矿床主矿体均位于NEE走向的压扭性逆断层中,主含矿断层受控于矿区北西部的F13;主矿体具有薄而富、尖灭再现的特征,整体向SW侧伏,矿体围岩蚀变强烈,主要为绢云母化、绿泥石化、碳酸盐化;成矿期构造应力场为NW-SE方向挤压,自现有矿体向SW寻找深部新矿是有意义的。
中文关键词:构造特征 控矿结构面 找矿方向 大青山金矿 新疆
 
Structural characteristics of metallogenic period and prospecting direction of the Daqingshan gold deposit in Hami, Xinjiang
Abstract:The East Tianshan-Beishan region is one of the important areas for the concentration of gold deposits in China. Over the past years, the eastern part of this region has achieved considerable prospecting results for the Daqingshan gold deposit as a consequence of the extensive employment of numerous exploration techniques. In order to identify the structural characteristics of the mineralization period and provide further guidance for ore prospecting, a comprehensive organization of the obtained exploration data and detailed observation and dissection of the mineralization structures in the mining area were conducted. The structural characteristics of the ore-controlling structural plane, the period of mineralization, and the distribution pattern of ore bodies were studied using a research approach combining field observation and indoor analysis, as well as a combination of macro and micro analysis. It is believed that the main ore bodies of the Daqingshan gold deposit are located in the NEE-trending transpressional thrust fault, with the main ore-bearing fault being controlled by the F13 fault in the NW part of the mining area. The main ore body is thin and rich, with pinch-outs and reappearances, overall lying towards SW. Sericitization, chloritization, and carbonatization are all part of the significant alteration. Extrusion along the NW-SE direction is a defining characteristics of the tectonic stress field during the metallogenic period. Additionally, it is meaningful to search for new and deep ore bodies in the SW direction.
keywords:structural characteristics, ore-controlling structural plane, prospecting direction, Daqingshan gold deposit, Xinjiang
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