黔东南金矿与圈定的黔湘桂新元古代火山构造特征及地质意义

发布时间：2018-05-15 12:29

本文选题：重磁异常 + 断裂　；参考：《现代地质》2017年03期

【摘要】：黔东南金矿地质勘查及找矿研究程度低,为之利用区域重磁资料,研究深部成矿环境,圈定区内可能存在一处大型的中心式喷发火山环形构造或隐伏岩浆岩体分布群。岩体异常北东向分布,覆盖面积广,组合形态复杂,分带特征明显,跨越黔湘桂三省区,主体异常在贵州,部分在湖南和广西,并受控于3条深大断裂,见中心环带、内环带、过渡环带、外环带,4带发育齐全,火山岩相配套出现,岩体异常分枝发育。研究发现天柱—锦屏—黎平及丹寨—三都与湘西会同—怀化等地区金矿,极有规律地分布于相应构造环带和地表背斜区及有利赋矿地层内,由内环向外环依次出现石英脉型、蚀变岩型、微细粒浸染型金矿。所圈定的潜火山构造或隐伏岩体群,将对黔湘桂交界地区地质特征及金矿成矿规律产生新的认识,具有重要的地质意义。
[Abstract]:The degree of geological exploration and prospecting of gold deposits in southeast Guizhou is low. Using the regional gravity and magnetic data to study the deep metallogenic environment, there may be a large central eruption volcanic ring structure or concealed magmatic body distribution group in the delineation area. The rock body anomaly distributes northward, covers a wide area, has complex assemblage and has obvious zonation characteristics. It spans the three provinces of Guizhou, Hunan and Guangxi. The main anomaly is in Guizhou, partly in Hunan and Guangxi, and is controlled by three deep and large faults, such as central ring zone and inner ring zone. The transition ring zone and outer ring belt are well developed, volcanic rocks are matched and abnormal branches of rock mass are developed. It is found that the gold deposits in Tianzhu, Jinping, Liping, Danzhai and Sandu areas and Hui-Huaihua area in western Hunan are distributed regularly in the corresponding tectonic ring zone, surface anticline area and favorable ore-hosting strata, and quartz vein type appears successively from the inner ring to the outer ring. Altered rock type, fine-grained disseminated gold deposit. The delineated subvolcanic structure or concealed rock mass group will have a new understanding of geological characteristics and metallogenic regularity of gold deposits in the border areas of Guizhou, Hunan and Guangxi, which is of great geological significance.
【作者单位】：贵州省地质调查院;贵州省地质物探开发应用工程技术研究中心;
【基金】：中国地质调查局项目“贵州省矿产地质与区域成矿规律综合研究”([2014]03-003-017) 国家自然科学基金项目(4160030417) 贵州省地质矿产勘查开发局地质科学研究项目(黔地矿科合[2016]34号)
【分类号】：P317;P618.51

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