云南峨山塔甸地区中元古界黑山头组石英岩矿地质特征  

Geological Characteristics of Quartzite Deposits of Mesoproterozoic Heishantou Formation in Tadian Area,Eshan,Yunnan Province

作　　者：李维科 刘军平 晏海宝 胡绍斌 何世军[4] 赵江泰 赵云江 魏思礼 LI Weike;LIU Junping;YAN Haibao;HU Shaobin;HE Shijun;ZHAO Jiangtai;ZHAO Yunjiang;WEI Sili(Yunnan Institute of Geological Survey,Kunming,Yunnan 650216;Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Ministry of Natural Resources,Kunming,Yunnan 650051;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083;The Second Geological Institute of China Metallurgical Geology Bureau,Fuzhou,Fujian 350108)

机构地区：[1]云南省地质调查院,云南昆明650216 [2]自然资源部三江成矿作用及资源勘查利用重点实验室,云南昆明650051 [3]中国地质大学(北京)地球科学与资源学院,北京100083 [4]中国冶金地质总局第二地质勘查院,福建福州350108

出　　处：《地球学报》2024年第4期493-501,共9页Acta Geoscientica Sinica

基　　金：云南省自然资源厅基金项目“云南1:5万大庄幅、法裱幅、底土幅、甸中幅区域地质调查”(编号:D202207);云南省科技计划项目(编号:202305AD160031,202401AT070012)联合资助。

摘　　要：通过1:5万区域地质调查、典型剖面及刻槽采样等研究,在云南峨山塔甸地区中元古界黑山头组识别出厚104~227 m数层石英岩矿层,含矿岩性为灰白色、白色、乳白色块-厚层状石英岩,呈隐晶质-粒状变晶结构,主要由石英(>95%)组成;分析显示样品SiO_(2)含量为95.15%~99.41%,Al_(2)O_(3)含量为0.21%~2.61%,CaO含量为0.008%~0.047%,TFe_(2)O_(3)含量为0.088%~0.47%,K_(2)O含量为0.009%~0.56%,MgO含量为0.010%~0.13%,Na_(2)O含量为0.012%~1.4%,TiO_(2)含量为0.011%~0.06%,部分达到玻璃用、结晶硅用等硅质原料矿工业指标要求,黑山头组石英岩矿为多层位赋存且单体厚度大的矿体,层位稳定,且延伸较远,为一套滨海相沉积-变质型石英岩矿床,具有较大潜在价值和经济效益,有望形成大型石英岩矿原料产地。Based on the 1:50000 regional geological survey,typical profile and notch sampling,the Mesoproterozoic Heishantou Formation in the Tadian area of Eshan,Yunnan Province,has identified several layers of quartzite deposits with a thickness of approximately 104–227 m.The ore-bearing lithology is gray-white,ivory-thick layered quartzite,with aphanitic-granular metamorphic structure,mainly composed of quartzite(>95%).The analysis shows that the sample contains 95.15%–99.41%SiO_(2),0.21%–2.61%Al_(2)O_(3),0.008%–0.047%CaO,0.088%–0.47%TFe_(2)O_(3),0.009%–0.56%K_(2)O,and 0.010%–0.13%MgO.The content of TiO_(2)is 0.011%–0.06%,which partially meets the industrial index requirements of siliceous raw materials such as glass and crystalline silicon.Heishantou Formation quartzite is an ore body with multi-layered occurrence and large monomer thickness,with a stable horizon and long extension.It is a set of coastal sedimentary metamorphic quartzite deposits with great potential value and economic benefits,and is expected to form a large-scale quartzite raw material-producing area in the future.

关 键 词：峨山地区 中元古界 黑山头组 石英岩矿 沉积变质型 找矿潜力 

分 类 号：P595[天文地球—地球化学]