| 赣南—粤北白垩纪火山岩的地球化学特征及其成因机制讨论 |
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| 引用本文： | 张树明,巫建华,周维勋,左跃明,李清龙. 赣南—粤北白垩纪火山岩的地球化学特征及其成因机制讨论[J]. 地质论评, 1999, 45(7): 712-716 |
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| 作者姓名： | 张树明 巫建华 周维勋 左跃明 李清龙 |
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| 作者单位： | 华东地质学院,江西临川,344000 |
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| 摘 要： | 通过对赣南—粤北白垩纪火山岩地球化学特征研究，得出火山岩系形成于一种过渡性构造环境（介于强烈挤压与强烈伸展之间）。其中，基性火山岩形成于走滑相对伸展环境，岩浆源自较深部，具亏损地幔性质；酸性火山岩形成于走滑相对挤压环境，岩浆源自较浅部，以壳源组分为主。它们共同构成过渡性岩浆杂岩建造。
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| 关 键 词： | 地球化学 构造环境 火山岩源区 白垩纪 赣南—粤北 |
A Discussion on the Origin and Geochemical Characteristics of Cretaceous Volcanic Sequences in South Jiangxi and North Guangdong |
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| Zhang Shuming,Wu Jianhu,Zhou Weixun,Zuo Yueming and Li Qinglong. A Discussion on the Origin and Geochemical Characteristics of Cretaceous Volcanic Sequences in South Jiangxi and North Guangdong[J]. Geological Review, 1999, 45(7): 712-716 |
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| Authors: | Zhang Shuming Wu Jianhu Zhou Weixun Zuo Yueming Li Qinglong |
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| Affiliation: | East China College of Geology,Linchuan,Jiangxi,344000 |
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| Abstract: | Through discussion and analysis of the geochemical characteristics of C re taceous volcanic rocks in south Jiangxi and north Guangdong,it is concluded th at volcanic rocks are formed in a transitional tectonic environment (between the highl y compressed and the highly extended). Basic volcanic rocks occur in a rela tively extensional environment.The magma comes from the depth with a depleted m antle nature.Acid volc anic rocks are formed in the relatively compressed environment.The magma comes f rom the shall ow parts and is dominatedby crustal compositions.Together they constitu te the intermediate magmatic complex formation. |
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