首页|云南峨山塔甸地区中元古界黑山头组石英岩矿地质特征

云南峨山塔甸地区中元古界黑山头组石英岩矿地质特征

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

Eshan areaMesoproterozoicHeishantou Formationquartzite oresedimentary metamorphic typeprospecting potential

李维科、刘军平、晏海宝、胡绍斌、何世军、赵江泰、赵云江、魏思礼

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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

中国冶金地质总局第二地质勘查院,福建福州 350108

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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

云南省自然资源厅基金项目云南省科技计划项目云南省科技计划项目

D202207202305AD160031202401AT070012

2024

地球学报
中国地质科学院

地球学报

CSTPCD北大核心
影响因子:1.797
ISSN:1006-3021
年,卷(期):2024.45(4)