收稿日期: 2020-10-19
修回日期: 2021-06-05
网络出版日期: 2021-10-08
Characteristics of Rock Geochemical Anomalies and Its Prospecting Effect of the Songshudaban Gold Deposit in Yanqi County，Xinjiang
Received date: 2020-10-19
Revised date: 2021-06-05
Online published: 2021-10-08
为了查明松树达坂金矿区土壤地球化学异常源，寻找金的矿化富集段，在矿区开展1∶2 000岩石地球化学剖面测量工作，圈定近NWW向展布的Au、As、Sb、Hg、Cu和Bi等元素原生晕综合异常带2条。通过异常查证，新发现金矿体3条，工程控制矿体长60~120 m，厚1.00~3.25 m，金品位为0.65×10-6~2.85×10-6，取得较好的化探异常圈定和地质找矿效果。综合分析矿区岩石地球化学综合异常和金矿化特征，认为与松树达坂次级韧性剪切带有关的中泥盆统萨阿尔明组第一亚组上段是寻找金矿的有利地段，也是重要的找矿标志层位。金矿体严格受韧性剪切带控制，矿区具有寻找韧性剪切带型金矿床的潜力。
范红科 , 郭根明 , 董波波 , 张凯 , 刘豫新 . 新疆焉耆县松树达坂金矿区岩石地球化学异常特征及找矿效果[J]. 黄金科学技术, 2021 , 29(4) : 477 -488 . DOI: 10.11872/j.issn.1005-2518.2021.04.186
Songshudaban gold deposit in Yanqi County is located in the middle part of the Southwest Tianshan of Xinjiang gold polymetallic metallogenic belt，and near north margin of suture zone between the Tarim plate and Kazakhstan-Erie plate.Songshudaban gold deposit produced in the Sahentuohai-Dashankou brittle-ductile shear zones.The ore-bearing rock are a set of fine clastic rocks and quartz veins from the middle Devonian Saaerming formation.The NW and NWW trending faults developed in the mining area，and metallogenic geological conditions are superior.1∶10 000 geological survey，1∶10 000 soil geochemical survey and explora-tory trench reveal，and other works have been carried out in the area.Four gold orebodies were found，but these orebodies have the features of small scale，low grade and extends unsteadily，the prospecting results are not outstanding.To identify abnormal sources of soil geochemical anomalies and search mineralized rich areas of gold，expand the size of the existing gold orebodies or find new gold orebodies in Songshudaban area，the 1∶2 000 rock geochemistry profile measurement were carried out，two primary halo comprehensive anomaly zones of Au，As，Sb，Hg，Cu，Bi with NWW trending were delinead.The anomalies are mainly distributed in limonite mineralized，kaolinized sericite phylliterelated to ductile shear zone.The mineralization and alteration of sericite chlorite slate，andesite porphyry，marble and other strata on both sides of the shear zone is relatively weak.After anomaly verification，three new gold orebodies and mineralization spots were found.The engineering control gold orebodies are 60~120 m long and 1.00~3.25 m thick with a grade of 0.65×10-6~2.85×10-6，it means that the good geochemical anomalies and ore prospecting results have been achieved.According to the features of rock geochemistry and gold mineralization，it is believed that the first subgroup of middle Devonian Saaerming formation is the favorable strata for searching gold deposits，and it is very important ore-searching criteria.The gold deposit is strictly controlled by ductile shear zones.There is great potential to find ductile shear zone gold deposits in Songshudaban mine area.
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