华南新元古代玄武质岩石成因与构造意义:从造山运动到陆内裂谷

被引:134
作者
李献华 [1 ]
王选策 [2 ]
李武显 [3 ]
李正祥 [1 ]
机构
[1] 澳大利亚科廷科技大学应用地质系地球科学研究所
[2] 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室
[3] 中国科学院广州地球化学研究所同位素年代学和地球化学重点实验室
关键词
新元古代; 玄武质岩石; 四堡造山运动; 板内裂谷; 地幔柱; 华南; 罗迪尼亚超大陆;
D O I
10.19700/j.0379-1726.2008.04.010
中图分类号
P581 [岩石成因]; P588.145 [];
学科分类号
070901 ;
摘要
华南广泛发育新元古代岩浆岩,深入了解这些新元古代岩浆岩的成因对研究区域大地构造及其在Rodinia超大陆的聚合-裂解演化中的作用有重要意义。目前学术界对这些岩浆岩的成因及其大地构造意义还存在很大的分歧。我们在系统分析华南新元古代玄武质岩石地球化学特征的基础上,通过对这些玄武质岩石的原始熔体成分和熔体温度,探讨其地幔源区的组成和热结构,为其形成的构造背景提供新的约束;结合近期发表的各种地质观察资料和玄武质岩石的研究结果,提出了华南晚中元古代-新元古代中期从造山运动到陆内裂谷的地球动力学演化的模型。
引用
收藏
页码:382 / 398
页数:17
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