香格里拉小中旬冈达概组下段岩石化学特征及构造背景分析

香格里拉小中甸冈达概组下段（Pg^1）分布于金沙江构造带与义敦岛弧之间的中咱微陆块，属中句基性火山岩带。本文研究中咱微陆块南部冈达概组下段，该地层主要由玄武质角砾凝灰熔岩、微晶玄武岩和玄武质角砾凝灰岩混层组成，具有富碱、高钛、轻稀土强烈富集的特征，是地幔低度熔融的产物，属大陆板内张裂型火山岩，与东邻区的峨眉山玄武岩（Pe）有相似的地球化学特征，反映两者的地幔源区具有亲缘关系，与地幔柱活动有关。...

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Bibliographic Details
Published in地质与勘探 Vol. 48; no. 6; pp. 1214 - 1220
Main Author 吕劲松 肖渊甫 邓江红 王涛 程超杰 龚婷婷 于海军 邓元兵
Format Journal Article
LanguageChinese
Published 2012
Subjects
冈达概组下段
地幔柱
大陆板内张裂型火山岩
构造背景
香格里拉
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Summary:香格里拉小中甸冈达概组下段（Pg^1）分布于金沙江构造带与义敦岛弧之间的中咱微陆块，属中句基性火山岩带。本文研究中咱微陆块南部冈达概组下段，该地层主要由玄武质角砾凝灰熔岩、微晶玄武岩和玄武质角砾凝灰岩混层组成，具有富碱、高钛、轻稀土强烈富集的特征，是地幔低度熔融的产物，属大陆板内张裂型火山岩，与东邻区的峨眉山玄武岩（Pe）有相似的地球化学特征，反映两者的地幔源区具有亲缘关系，与地幔柱活动有关。
Bibliography:LV Jing - song , XIAO Yuan - fu , DENG Jiang - hong , WANG Tao , CHENG Chao - jie , GONG Ting - ting , YU Hai - jun , DENG Yuan - bing（ 1. Chengdu University of Technology, Chengdu,Sichuan 610059 ;2. No. 108 Geological Brigade of Geology ＆ Mineral Resources Exploration ＆ Development Bureau of Sichuan Province,Chengdu,Sichuan 611230）
11-2043/P
The lower Gangdagai Formation, which is distributed in the Zhongza landmass between the Jinsha River tectonic belt and Yidun island arc, is part of the Zhongdian volcanic belt. This study focuses on the lower Gangdagai Formation in the south of the Zhongza landmass. The results show that the strata are dominated by mixed basaltic breccia - tuff lava, microcrystalline basalt, and basaltic breccia tuff, and characterized by rich alkali, high titanium content, and strong enrichment of light rare earth elements. They are the products of the low - degree molten mantle, belonging to tensile fracture volcanic rocks within a continental plate. They share similar geochemical charac
ISSN:0495-5331