| 大青山东段火山成因非金属矿床地质特征及控矿因素探讨 |
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| 引用本文：.1999.Ore-control Factors of the Mesozoic Volcanogenic Nonmetallic Deposits in Eastern Daqing Mountain Area[J].Mineral Deposits,18(2):161~167 |
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| 基金项目:国家计委地质科技找矿攻关项目 |
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| 中文摘要:大青山东段中生代火山成因非金属矿床可划分为两大成因类型。对不同成因类型矿床地质特征、控矿因素的详尽研究表明：火山穹窿构造与火山岩浆、火山熔岩改造型及火山碎屑岩-熔岩改造型沸石、膨润土矿床有关；火山侵出岩丘控制了珍殊岩矿床与沸石矿床的形成。火山岩相、火山岩岩石学特征、岩石化学特征等严格地控制了该区火山成因非金属矿床的形成，珍珠岩及火山玻璃质岩是形成本区火山成因非金属矿的成矿原岩。 |
| 中文关键词:火山成因 控矿因素 非金属矿床 大青山 |
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| Ore-control Factors of the Mesozoic Volcanogenic Nonmetallic Deposits in Eastern Daqing Mountain Area |
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| Abstract:On the basis of metallogenic environments and ore-forming processes, the Mesozoic volcanogenic nonmetallic deposits such as bentonite, zeolite, obsidian, perlite and kaolinite deposits in eastern Daqing Mountain are divided into two genetic types and eight subtypes. The comprehensive researches on geological properties of 17 genetic types of deposits have shown that the ore-forming protoliths of volcanogene magmatic deposits are rhyolites, which exhibit different characteristics in such aspects as rock associations, ore types, phenocryst content of ore minerals, orebody shales, attitudes and sizes. Different volcanogene eruptive-sedimentary reformation deposits are somewhat different in protoliths , ore types, orebody shapes, attitudes and sizes. Further analysis of ore-control factors reveals the following regularity: in Xianhua-Houcheng inhertied volcanic basin on the west, most ore-bearing rocks are common sedimentary rocks intercalated with a small quantity of tuff, and volcanic substance is far away from the crater, forming the sedimentary volcanogene clastic reformation type bentonite deposits; in Ningcheng-Pingquan Neogenic rising volcanic basin, ore-bearing rocks are mainly volcanic rocks, while common sediments are rarely seen, so that there are chiefly volcanogene magmatic deposits, volcanogene clastic rock-lava reformation type bentonite deposits and zeolite deposits; in Guyuan-Zhenglanqi faulted volcanic basin at the center, the ore-bearing rocks are common volcanogene clastic rocks, volcanogene lava and sedimentary volcanogene clastic rocks, mainly forming complex zeolite deposits. The volcanic domes are related to volcanogene magmatic type, volcanogene lava reformation type and volcanogene clastic lava reformation type zeolite and bentonite deposits. The formation of perlite deposits and zeolite deposits is controlled by the volcanogene intrusive hillocks. Volcanic activities, volcanic petrofacies and volcanic petrology strictly control the formation of nonmetallic deposits of different geneses. A study of the relationship between petrochemistry and mineralization demonstrates that ore-forming protoliths of the volcanogen nonmetallic deposits in cast Daqing Mountain region are perlite and volcanic glass rocks. Based on an analysis of the regional metallogenic geological setting, this paper indicates the ore-prospecting targets in eastern Daqing Mountain. |
| keywords:volcanogdnic, control factor, nonmetallic deposit, Daqing Mountain |
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