云南主要双峰式火山岩及相关矿产资源

发布时间：2018-06-15 12:41

本文选题：双峰式火山岩 + 构造背景　；参考：《地质学报》2017年11期

【摘要】：云南双峰式火山岩时空分布较为广泛,贯穿云南及整个西南"三江"地区的地质发展演化过程,并伴有各具特色的矿产。本文基于前人的研究资料,总结了云南主要的双峰式火山岩的时空分布和相关矿产资源的情况,并讨论与双峰式火山岩有关的地质构造背景。总结出在地质历史演化过程中,云南主要分布有:(1)元古宙:滇中地区中元古代大红山群、河口群、东川群、昆阳群中的碱性火山岩及细碧-角斑岩类火山岩组合,新元古代与苏雄组同期的双峰式火山岩;(2)早寒武世梅树村期:扬子地台西缘玄武岩和凝灰岩等火山喷发记录;(3)中—晚志留世:滇西普洱大平掌铜多金属矿区大凹子组(S2+3d)细碧岩-石英角斑岩建造;(4)中—晚泥盆世:滇西北德钦羊拉里农组(D2+3l)碎屑岩夹双峰式火山岩+碳酸盐岩;(5)早三叠世:金沙江造山带攀天阁组(T1p)流纹岩+崔依比组(T1c)玄武岩(细碧岩或蚀变玄武岩)组成的"双峰式"火山岩,滇西洱源岩群双峰式火山岩;(6)中—晚三叠世:澜沧江造山带中南段忙怀组(T2m)流纹岩、流纹英安岩、流纹质火山碎屑岩、少量玄武岩和小定西组(T3x)玄武质火山碎屑岩以及芒汇河组(T3mh)玄武岩、流纹质火山碎屑岩组成的双峰式火山岩;(7)古近纪:剑川组(E2j)碱性玄武岩-粗面质火山角砾岩组合等7个阶段的双峰式火山岩,其地质构造背景各异,并伴有各具特色的矿产。这些双峰式火山岩可以作为制约云南及整个西南"三江"地区关键地质演化和成矿事件的标志性地质现象,是研究其地质构造背景和成矿作用的重要依据。
[Abstract]:The bimodal volcanic rocks in Yunnan are widely distributed in time and space, which runs through the geological development and evolution process of Yunnan and the whole "Sanjiang" area of southwest China, and is accompanied by mineral resources with their own characteristics. Based on the previous research data, this paper summarizes the temporal and spatial distribution of the main bimodal volcanic rocks in Yunnan and the related mineral resources, and discusses the geological tectonic background related to the bimodal volcanic rocks. In the process of geological history evolution, Yunnan is mainly distributed in the Proterozoic: the Mesoproterozoic Dahongshan Group, Estuary Group, Dongchuan Group, Kunyang Group, and the volcanic assemblages of the fine-bize-diagonal porphyry, the Mesoproterozoic Dahongshan Group, the Estuarine Group, the Dongchuan Group, and the Kunyang Group. Mesoproterozoic and Suxiong formation bimodal volcanic rocks in the same period: early Cambrian Meishucun: records of volcanic eruptions such as basalt and tuff in the western margin of the Yangtze platform, China) Middle and late Silurian: Dabou, Dapingzhang polymetallic ore area, Pu'er, western Yunnan Meso-late Devonian: Deqenyanglannong formation, northwestern Yunnan, China: clastic rocks with bimodal volcanic rocks and carbonate rocks, Yao5) early Triassic: Pantenge formation, Jinshajiang orogenic belt, Pangtenge formation, T1p) rhyolite The "bimodal" volcanic rocks of the Cuibi formation T1c) basalts (basalts or altered basalts), Bimodal volcanic rocks of Eryuan Group, Western Yunnan, China (Mid to late Triassic: T2m) rhyolite, rhyolite andesite, rhyitic volcanic clastic rock, Cenghuai formation in the central and southern part of Lancangjiang orogenic belt, A small amount of basalts and T3x) Black Tortoise pyroclastic rocks and T3mh) basalts of Manyihe formation, Bimodal volcanic rocks, composed of fluvial pyroclastic rocks, are bimodal volcanic rocks in 7 stages, such as the bimodal volcanic rocks composed of bimodal volcanic rocks: Jianchuan formation, E2j) alkaline basalts and coarse-surface-volcanic breccia assemblages. These bimodal volcanic rocks can be regarded as the iconic geological phenomena restricting the key geological evolution and metallogenic events in Yunnan and the whole "Sanjiang" area of southwest China, which is an important basis for studying their geological tectonic setting and mineralization.
【作者单位】：中国地质大学(北京)地球科学与资源学院;国家地质实验测试中心;
【基金】：中国地质科学院基本科研业务费项目(编号YYWF201619) 国家自然科学基金项目(编号41072073) 国土资源大调查项目(编号12120113002500) 国土资源部公益性行业科研专项(编号201211078)资助的成果
【分类号】：P588.14;P617

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