网络出版日期: 2024-07-03
基金资助
中国地质调查局项目“全国重要矿集区找矿预测”(DD2016005221);国家重点研发计划项目“中东部地区金和铜矿床三维探测技术与增储示范——陕西省夏家店地区金矿综合找矿技术与增储示范”(2022YFC2903605);陕西省地质勘查基金项目“陕西省山阳中村—商南湘河一带金矿成矿规律与找矿预测研究”(61201707317)
Study on Metallogenic Regularity and Prospecting Prediction of Shanyang-Shangnan Gold Deposits in Shaanxi Province
Online published: 2024-07-03
近年来,陕西省山阳王家坪—商南一带已发现多种类型的金矿床,然而以往研究缺少对该区域典型矿床的细致解剖,对区域金矿床控矿因素、赋存规律及矿床成因的认识不足,导致区内成矿规律和找矿方向不明晰,制约了本区找矿突破。在调查区域地质构造背景的基础上,系统梳理了王家坪—商南一带典型金矿床地质特征、控矿因素及赋矿规律,结合典型金矿床的流体包裹体特征,总结了区内金矿床(点)空间分布特征、成矿条件及赋存规律。研究表明:区内金矿床(点)受近EW向山阳—凤镇断裂、镇安—板岩镇断裂或其次级断裂带控制,发育在特定地层的层间断裂或剪切断裂中,受断裂和地层双重因素控制,总体呈近EW向带状分段富集,在不同地段金矿体受不同形式断裂控制,总体呈透镜状产出。根据矿区成矿特征、控矿因素及成矿规律,建立了区内金矿找矿预测模型,并结合地层、构造及化探异常分布范围预测出找矿靶区5处,为该区下一步找矿勘查部署提供了新思路和新方向。
樊忠平, 张望, 王卫 . 陕西省山阳—商南金矿成矿规律及找矿预测研究[J]. 黄金科学技术, 2023 , 31(4) : 560 -579 . DOI: 10.11872/j.issn.1005-2518.2023.04.178
In recent years,many types of gold deposits have been found in Wangjiaping-Shangnan area,Shaanxi Province.Due to the lack of detailed antomy of the typical deposits in the region,and insufficient understanding of the ore-controlling factors,occurrence regularity,and genesis of the regional gold deposits,the metallogenic regularity and propecting direction in the region are not clear,which restricts the propecting breakthrough in this area.On the basis of investigating the regional geological structure background,the geological characteristics,ore-controlling factors and ore-bearing laws of typical gold deposits in Wangjiaping-Shangnan area were systematically sorted out.Combined with the characteristics of fluid inclusions in typical gold deposits,the spatial distribution characteristics,metallogenic conditions and the occurrence and mineralization patterns of gold deposits(points)in the area were summarized.The results show that the gold deposits(points) in the area are controlled by the nearly EW-trending Shanyang-Fengzhen fault,Zhen’an Banyanzhen fault,or their secondary fault belts.They are developed in the interlayer faults of specific strata and controlled by dual factors of faults and strata,the gold deposits(spots)in the area are generally enriched in the nearly EW-trending zonal segmentation.The gold orebodies in different sections are controlled by different forms of faults and overall lenticular output.According to the metallogenic characteristics,ore-controlling factors and metallogenic regularity of the mining area,the prospecting prediction model of gold deposits in the area was established,and five prospecting target areas were predicted in combination with the distribution range of strata,structures and geochemical anomalies,which provides new ideas and new directions for the next step of ore exploration work in the area.
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