| 两广交界处岑溪二叠纪岛弧型玄武岩及其古特提斯性质的讨论 |
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| 引用本文： | 张伯友,张海祥,赵振华,杨树锋,陈汉林,石满全. 两广交界处岑溪二叠纪岛弧型玄武岩及其古特提斯性质的讨论[J]. 南京大学学报(自然科学版), 2003, 39(1): 46-54 |
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| 作者姓名： | 张伯友 张海祥 赵振华 杨树锋 陈汉林 石满全 |
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| 作者单位： | [1]浙江大学地球科学系，杭州310027 [2]中科院广州地球化学研究所，广州510640 |
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| 基金项目： | 中科院知识创新工程项目(编号:KZCX2-102)，国家自然科学基金(编号:49873008)资助 |
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| 摘 要： | 两广交界处的岑溪二叠纪岛弧型玄武岩是华南地区(狭义)首次报道的、有较为可靠同位素年龄的晚古生代活动大陆边缘型玄武岩。对该地区玄武岩和细碧角斑岩的主量元素、微量元素(包括稀土元素)和同位素年代学进行了综合研究，论证了岑溪细碧角斑岩建造是与古特提斯域大陆边缘岛弧或弧间盆地有关的二叠纪火山喷发产物。
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| 关 键 词： | 华南地区 岑溪 二叠纪 岛弧型玄武岩 枕状玄武岩 古特提斯 同位素年代学 细碧角斑岩 火山岩 |
Permian Island-arc Basalt in West Guangdong and East Guangxi Tectonic Belt, South China: Implications for the Paleotethys |
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| Zhang Bo-You,Zhang Hai-Xiang,Zhao Zhen-Hua,Yang Shu-Feng,Chen Han-Lin,Shi Man-Quan. Permian Island-arc Basalt in West Guangdong and East Guangxi Tectonic Belt, South China: Implications for the Paleotethys[J]. Journal of Nanjing University: Nat Sci Ed, 2003, 39(1): 46-54 |
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| Authors: | Zhang Bo-You Zhang Hai-Xiang Zhao Zhen-Hua Yang Shu-Feng Chen Han-Lin Shi Man-Quan |
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| Abstract: | This paper reported our recent discovery of Permian island arc type basalt at Cenxi, a border district between Guangdong and Guangxi provinces, southern China. The volcanic unit consists of spilite, keratophyre, quartz porphyry, basaltic andesite and volcanic breccia, and the host strata consists of Silurian, Devonian and Carboniferous flysch formations in which the siliceous rocks, pelitic rocks and limestones are in fault contact with one another. Petrology and geochemical characteristics of these volcanic rocks show that this volcanic unit 40Ar/39Ar age of 261 Ma) is island arc type basalt forming in an active continental margin (island arc marginal sea or small ocean basin related with the Paleotethyan tectonic belt in west Guangdong and east Guangxi). |
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| Keywords: | pillow basalt 40Ar/39Ar age Permian island arc Paleotethys South China |
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