| 麻 菁.中国碱性杂岩的成因及其成矿作用[J].地质与勘探,2015,51(3):466-477 |
| 中国碱性杂岩的成因及其成矿作用 |
| Genesis and metallogenesis of alkaline complexes in China mainland |
| 投稿时间：2014-11-04 修订日期：2015-03-15 |
| DOI： |
| 中文关键词: 碱性杂岩 深大断裂 Sr-Nd-Pb同位素 |
| 英文关键词: alkaline complex, deep faults, Sr-Nd-Pb isotopes |
| 基金项目:国家自然科学基金项目(41072073)?国土资源部公益性行业科研专项(201211078)和国土资源大调查项目(12120113002500)资助 |
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| 中文摘要: |
| 本文从碱性杂岩的产出和分布、地质特征、地球化学特征、成因、成矿作用几个方面综述了近年来对于我国碱性杂岩的研究成果与进展：(1）岩石学和同位素特征表明，硅不饱和的碱性杂岩类多属地幔低度部分熔融的原始岩浆为主侵位的产物；而硅饱和或过饱和碱性杂岩类多属深源岩浆与陆壳混染的产物。(2）地幔源区的低度部分熔融导致了稀土元素和大离子亲石元素等不相容元素的富集，同时富集的挥发分构成了矿化剂，对成矿具有重要控制作用。(3）深大断裂控制着碱性杂岩的产出，同时伴随着地质历史时期的重要地质事件，中国受深大断裂控制的碱性杂岩带主要有郯城-庐江碱性杂岩带、攀西碱性杂岩带和哀牢山-金沙江碱性杂岩带等9条。 |
| 英文摘要: |
| This paper presents the recent research results on the occurrence, distribution, geological and geochemical characteristics, genesis and metallogenesis of alkaline complexes in China mainland. The petrographic and isotopic characteristics indicate that silica-undersaturated alkaline complex is mostly the product of original magma emplacement, which mainly comes from low-degree partial melting mantle. However, silica-saturated or silica-supersaturated alkaline complex is mostly the product of deep source magma contaminated by continental crust. Low-degree partial melt of mantle source led to the enrichment of rare earth elements, large ion lithophile elements and other incompatible elements, while the volatile material enriched in the same time constitutes mineralizer, which has an important controlling role in mineralization. Deep faults control the output of alkaline complex, accompanied by significant geological events in geological history. Alkaline complex zones controlled by deep faults in China mainland include nine major alkaline complex zones, such as the Tancheng-Lujiang alkaline complex zone, Panxi alkaline complex zone and Ailaoshan-Jinsha River alkaline complex zone. |
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