本文選題：雙峰式火山巖 + 構造背景　； 參考：《地質(zhì)學報》2017年11期

【摘要】：云南雙峰式火山巖時空分布較為廣泛,貫穿云南及整個西南"三江"地區(qū)的地質(zhì)發(fā)展演化過程,并伴有各具特色的礦產(chǎn)。本文基于前人的研究資料,總結了云南主要的雙峰式火山巖的時空分布和相關礦產(chǎn)資源的情況,并討論與雙峰式火山巖有關的地質(zhì)構造背景�？偨Y出在地質(zhì)歷史演化過程中,云南主要分布有:(1)元古宙:滇中地區(qū)中元古代大紅山群、河口群、東川群、昆陽群中的堿性火山巖及細碧-角斑巖類火山巖組合,新元古代與蘇雄組同期的雙峰式火山巖;(2)早寒武世梅樹村期:揚子地臺西緣玄武巖和凝灰?guī)r等火山噴發(fā)記錄;(3)中—晚志留世:滇西普洱大平掌銅多金屬礦區(qū)大凹子組(S2+3d)細碧巖-石英角斑巖建造;(4)中—晚泥盆世:滇西北德欽羊拉里農(nóng)組(D2+3l)碎屑巖夾雙峰式火山巖+碳酸鹽巖;(5)早三疊世:金沙江造山帶攀天閣組(T1p)流紋巖+崔依比組(T1c)玄武巖(細碧巖或蝕變玄武巖)組成的"雙峰式"火山巖,滇西洱源巖群雙峰式火山巖;(6)中—晚三疊世:瀾滄江造山帶中南段忙懷組(T2m)流紋巖、流紋英安巖、流紋質(zhì)火山碎屑巖、少量玄武巖和小定西組(T3x)玄武質(zhì)火山碎屑巖以及芒匯河組(T3mh)玄武巖、流紋質(zhì)火山碎屑巖組成的雙峰式火山巖;(7)古近紀:劍川組(E2j)堿性玄武巖-粗面質(zhì)火山角礫巖組合等7個階段的雙峰式火山巖,其地質(zhì)構造背景各異,并伴有各具特色的礦產(chǎn)。這些雙峰式火山巖可以作為制約云南及整個西南"三江"地區(qū)關鍵地質(zhì)演化和成礦事件的標志性地質(zhì)現(xiàn)象,是研究其地質(zhì)構造背景和成礦作用的重要依據(jù)。
[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.
【作者單位】： 中國地質(zhì)大學(北京)地球科學與資源學院;國家地質(zhì)實驗測試中心;
【基金】：中國地質(zhì)科學院基本科研業(yè)務費項目(編號YYWF201619) 國家自然科學基金項目(編號41072073) 國土資源大調(diào)查項目(編號12120113002500) 國土資源部公益性行業(yè)科研專項(編號201211078)資助的成果
【分類號】：P588.14;P617

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