| 新疆北部古生代地壳演化及成矿系列 |
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| 引用本文：.1992.Evolution Of Paleozoic Crust And Metallogenic Series In Northern Xinjiang[J].Mineral Deposits,11(4):307~314 |
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| 基金项目:国家自然科学基金资助项目(地球科学部9487001-1) |
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| 中文摘要:何国琦(1989)将裴伟的洋壳-过渡壳-陆壳三阶段模式发展为古生代地壳演化的老陆壳-拉张型过渡壳-洋壳-汇聚型过渡壳-新陆壳五阶段模式。结合新疆北部地壳演化叙述了五阶段的特征及新疆北部各构造带在古生代的演化史及其成矿系列。 |
| 中文关键词:地壳演化 拉张型过渡壳 汇聚型过渡壳 成矿系列 |
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| Evolution Of Paleozoic Crust And Metallogenic Series In Northern Xinjiang |
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| Abstract:In 1972, some Soviet geologists divided the evolution of the Paleozoic crust Into three stages: oceanic, transitional and continental. This theory was later developed by Professor He Guoqi, who divided this evolution into five stages in order of old continental crust, tensile transitional crust, oceanic crust, convergent transitional crust and Paleozoic new continental crust. Based on this five-stage model, this paper has dealt with the evolution of Paleozoic crust and summarized the metallogenic series in northern Xinjiang as follows：1. Old continental stage. 2. Tensile transitional stage: In volcanic passive continental margin there are volcanogene hydrothermal type copper, lead, zinc and gold deposits in spilite-keratophyre formation (Ashele), volcanic effusive-sedimentary iron-copper deposits in kalikeratophyre (Yamansu) and volcanogene sedimentary reformed lead-zinc deposits in terrigenous clastic-volcanic formation (Keketale).In nonvolcanic passive continental margin, there are stratabound lead-zinc
deposits in carbonate formation (Huoskibulak), and subvolcanic ore-magmatic injection iron deposits in gabbro-diabase formation of rift (Cihai).
3. Oceanic stage: There exist magmatic type chromite and platinum deposits (Saertuohai) and metamorphic type nephrite deposits in ophiolite formation (Manasi). 4. Convergent transitional type: There are volcanic, volcanogene sedimentary, volcanogene hydrothermal and hydrothermal type iron-copper-lead-zinc-gold deposits in volcanic formation (Shikebutai, Shequanzi, Maxhuangshan and Heifengshan), porphyry type copper, molybdenum and gold deposits in diorite porphyry and granodiorite porphyry formations (Chihu and Kalaxiangeer), and skarn-hydrothermal type tungsten, molybdenum, copper, lead, zinc and iron deposfts in granodiorite-adamellite formation (Tieling, Qiongluoke and Liujiaquan).5. New continental stage：The consolidation period includes granite-pegmatite type rare metal-gem-stone series related to parautochthonous metasomatic type two-mica granite (Altay), greisen, skarn and hydrothermal type tungsten-tin-molybdenum-copper-lead-zinc-gold metallogenic series related to allochthonous type K-feldspar Granite (east Junggar), and hydrothermal type gold deposit in clastic formation (west Junggar); the relaxation period has magmatic type copper-nickel deposits in mafic-ultramafic complex (Kalatongke and Huangshan)；the stable period has magmatic type vanadium-titanium-iron-REE metallogenic series in alkali gabbro-syenite formatiom the activation period includes hydrothermal gold deposits in ductile shear zone and volcanogene hydrothermal type copper and iron deposits in intracontinental rift type volcanic formation (Gongneisi). |
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