| 青龙-阜新花岗岩成矿模式 |
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| 引用本文：.1992.Metallogenic Model Of Qinglong-Fuxin Granites[J].Mineral Deposits,11(4):331~340 |
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| 中文摘要:青龙-阜新构造岩浆成矿带，展布2类5型中生代花岗岩27处，分5次侵入，燕山期第2序I型细粒二长花岗岩与成矿直接有关。两大矿源层——建平群中的钼铜金硫和长城系中的铅锌锰铁。壳源重熔花岗岩浆以多种方式将多源成矿物质汇集成多种类型的多金属矿床，在空间上形成紧密共生有规律展布的花岗岩成矿系列。在水平方向上以花岗岩体为中心划分出四个成矿带和相应的三套围岩蚀变组合。火山机构中由下而上呈现两层楼成矿模式。 |
| 中文关键词:花岗岩成矿系列 矿质来源 成因类型及成矿模式 |
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| Metallogenic Model Of Qinglong-Fuxin Granites |
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| Abstract:Along the Qinglong-Fuxin tectnomagmatic belt there are 27 Mesozoic granites belonging to 2 groups composed of 5 types, which were intruded in 5 times with the fine-grained adamellite of Series 2 and Type I directly related to mineralization. The area has mainly molybdenum deposits and subordinate copper, gold, lead, zinc, manganese and iron deposits, which might be assigned to 5 genetic types. There exist 2 large source beds: as a result of metatexis, Mo, Cu, Au and S in Jianping Group were inherited by crustal anatectic granitic magma and then, through differentiation and derivation, formed ore deposits; Lead, zinc, manganese and iron in Changcheng System were mobilized and concentrated into ore deposits under the action of granitic magmatic gas and liquid. In several ways granitic magma concentrated multi-Source ore-forming substances into various types of polymetallic deposits, which formed at their corresponding geologic positions regularly-distributed and closely-associated deposits making up granitic metallogenic series. Centering on the granite body, ore deposits are arranged outwards in order of porphyry type molybdenum deposits. copper-moly-bdenum deposits and gold deposits contact metasomatic type iron-mangnese deposits and copper-iron deposits hydrothermaI metasomatic type molybdenum deposits and copper deposits hydrothermal filling type lead-zinc deposits of the distant outer zone. In the volcanic apparatus, a two-storeyed metallogenic model is observed, the lower part being porphyry type molybdenum deposits and the upper part being volcanogene hydrothermal type gold and polymetallic deposits. Correspondingly there appear three sets of wall rock alteration: within the rock body there is planar potassic alteration upon which are superimposed linear phyllic alteration, illitlzation and chloritization along the contact zone there are intense skarnization, serpentinization and epidotization; in the wall rocks of the outer zone there are siIicification, carbonatization and chloritization of differen intensities. The metallogenic modeI of granite deposit series not only summarizes the ore-forming mechanism and regional metallogenic regularity but also guides the prospecting for ore deposits in similar areas. |
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