| 哈萨克斯坦阿尔泰戈尔诺耶古近纪砂金矿地质特征及成矿规律 |
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| 引用本文： | 杜菊民,连晨光,陈诚,景永波,刘平,胡英健,孙晨.哈萨克斯坦阿尔泰戈尔诺耶古近纪砂金矿地质特征及成矿规律[J].新疆地质,2021(1):134-139. |
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| 作者姓名： | 杜菊民 连晨光 陈诚 景永波 刘平 胡英健 孙晨 |
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| 作者单位： | 江苏省地质工程有限公司 |
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| 基金项目： | 江苏省地质勘查基金项目(苏财建〔2015〕436号)资助。 |
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| 摘 要： | 阿尔泰造山带砂金矿资源丰富,前人对河流中的砂金矿进行了详细研究,而对山间盆地中赋存的砂金矿研究较少。本文对哈萨克斯坦阿尔泰造山带南缘最东侧的戈尔诺耶古近纪含砂金盆地进行了初步研究,通过地质、自然重砂测量圈定了砂金异常,经浅井和砂钻等工程深部查证,结果显示砂金主要赋存在古近纪粗粒的石英砾石层中,砂金形态以片状为主,是以微细粒金为主的砂金矿。砂金矿化体呈层状、透镜状分布。进一步对古近纪石英砾石层及现代河流样品的重矿物形态特征、报出率及R型聚类分析、ZTR指数等进行了对比分析。综合分析认为,戈尔诺耶古近纪砂金矿主要来源于西北侧的卡尔巴-纳雷姆成矿带的风化剥蚀,而卡利吉尔河流的砂金来自北侧额尔齐斯成矿带的补给。中晚始新世时期,自北西向南东的水流沉积了戈尔诺耶古近纪盆地砂金矿,晚中新世以来的隆升使得南北向河流下切侵蚀作用增强,形成了丰富的现代河流砂金矿。这一认识对寻找盆地类型砂金矿,理解阿尔泰造山带新生代构造演化具有一定意义。
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| 关 键 词： | 阿尔泰 古近纪 砂金矿 自然重砂 聚类分析 ZTR指数 |
Geological Characters and Metallogenic Regularity Analysis of Paleogene Gold Placer in Gornoye,Altay,Kazakhstan |
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| Du Jumin,Lian Chenguang,Chen Chen,Jing Yongbo,Liu Ping,Hu Yingjian,Sun Chen.Geological Characters and Metallogenic Regularity Analysis of Paleogene Gold Placer in Gornoye,Altay,Kazakhstan[J].Xinjiang Geology,2021(1):134-139. |
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| Authors: | Du Jumin Lian Chenguang Chen Chen Jing Yongbo Liu Ping Hu Yingjian Sun Chen |
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| Institution: | (Jiangsu Geology and Engineering Co.Ltd.,Nanjing,Jiangsu,210018,China) |
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| Abstract: | TheAltai orogenic belt is rich in placer gold resources.Predecessors have conducted detailed research on placer gold deposits in rivers,but less research on placer gold deposits occurring in mountain basins.This paper conducts a preliminary study on the Gornoye Paleogene gold-bearing basin on the easternmost side of the southern edge of the Altai orogenic belt in Kazakhstan.The placer gold anomaly has been delineated through geological and natural heavy sand measurement,and it has been verified by shallow wells and sand drills.The results show that placer gold is mainly contained in the Paleogene coarse-grained quartz gravel layer.Placer gold is mainly in sheet form,and it is a placer gold deposit mainly composed of micro fine grained gold.T the placer gold mineralization is layered,lenticular distribution.The morphological characteristics of heavy minerals,quote rate and R-type cluster analysis,ZTR index,etc were further compared and analyzed.Comprehensive analysis suggests that the Paleogene Gornoye deposits mainly originated from the weathering and denudation of the Karba-Narym metallogenic belt on the northwest side,while the placer gold from the Kal’dzhir River came from the Irtysh mineralization on the north side.During the mid-late Eocene,the current flowing from northwest to southeast along the piedmont fault deposited the Gornoye Paleogene placer gold deposits.The uplift since the late Miocene increased the erosion of the north-south rivers and formed A rich modern placer gold mine.This understanding has certain significance for finding basin-type placer gold deposits and understanding the Cenozoic tectonic evolution of the Altai orogenic belt. |
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| Keywords: | Altay Orogeny Paleogene Placer gold Nature Heavy Minerals Cluster analysis ZTR index |
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