云南峨山塔甸地区中元古界黑山头组石英岩矿地质特征OA北大核心CSTPCD
Geological Characteristics of Quartzite Deposits of Mesoproterozoic Heishantou Formation in Tadian Area,Eshan,Yunnan Province
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SiO2 含量为 95.15%～99.41%,Al2O3 含量为 0.21%～2.61%,CaO含量为 0.008%～0.047%,TFe2O3 含量为 0.088%～0.47%,K2O 含量为 0.009%～0.56%,MgO 含量为 0.010%～0.13%,Na2O含量为 0.012%～1.4%,TiO2 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 1:50 000 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%SiO2,0.21%-2.61%Al2O3,0.008%-0.047%CaO,0.088%-0.47%TFe2O3,0.009%-0.56%K2O,and 0.010%-0.13%MgO.The content of TiO2 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.
李维科;刘军平;晏海宝;胡绍斌;何世军;赵江泰;赵云江;魏思礼
云南省地质调查院,云南昆明 650216||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云南省地质调查院,云南昆明 650216||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||中国地质大学(北京)地球科学与资源学院,北京 100083云南省地质调查院,云南昆明 650216中国冶金地质总局第二地质勘查院,福建福州 350108
地质学
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
Eshan areaMesoproterozoicHeishantou Formationquartzite oresedimentary metamorphic typeprospecting potential
《地球学报》 2024 (004)
493-501 / 9
本文由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)和云南省科技计划项目(编号:202305AD160031;202401AT070012)联合资助. This study was supported by Department of Nat-ural Resources of Yunnan Province(No.D202207),and Science and Technology Plan Project of Yunnan Province(Nos.202305AD160031 and 202401AT070012).
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