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
李维科 1刘军平 2晏海宝 3胡绍斌 1何世军 4赵江泰 3赵云江 3魏思礼3
作者信息
- 1. 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
- 2. 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
- 3. 云南省地质调查院,云南昆明 650216
- 4. 中国冶金地质总局第二地质勘查院,福建福州 350108
- 折叠
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.
Abstract
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.
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Key words
Eshan area/Mesoproterozoic/Heishantou Formation/quartzite ore/sedimentary metamorphic type/prospecting potential引用本文复制引用
基金项目
云南省自然资源厅基金项目(D202207)
云南省科技计划项目(202305AD160031)
云南省科技计划项目(202401AT070012)
出版年
2024
国家科技期刊平台
NSTL
万方数据