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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关键词:Eshan area Mesoproterozoic Heishantou Formation quartzite ore sedimentary metamorphic type prospecting potential |
基金项目: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) |
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摘要: |
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. |
LI Weike,LIU Junping,YAN Haibao,HU Shaobin,HE Shijun,ZHAO Jiangtai,ZHAO Yunjiang,WEI Sili.2024.Geological Characteristics of Quartzite Deposits of Mesoproterozoic Heishantou Formation in Tadian Area, Eshan, Yunnan Province[J].Acta Geoscientica Sinica,45(4):493-501. |
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