Geochronological and geochemical constraints on the petrogenesis and tectonic significance of Paleozoic dolerite dykes in the southern margin of Alxa Block, North China Craton
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- 作者：Jun Duana ; Chusi Lib ; Zhuangzhi Qiana ; zyxyqzz8@chd.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Jiangang Jiaoa
- 关键词：Zircon U&ndash ; Pb dating ; Sm&ndash ; Nd&ndash ; Hf isotopes ; Trace elements ; Dolerite dykes ; Jinchuan ; Alxa Block
- 刊名：Journal of Asian Earth Sciences
- 出版年：2015
- 出版时间：1 November 2015
- 年：2015
- 卷：111
- 期：Complete
- 页码：244-253
- 全文大小：2192 K
文摘
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The dolerite dykes in the Jinchuan area, southwestern North China Craton were emplaced at ∼424 Ma.
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The parental magma of the Jinchuan dolerite dykes underwent strong crustal contamination.
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Partial melting in the source mantle was induced by asthenosphere upwelling associated with slab break-off.
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The southwestern margin of North China Craton was an active plate margin in Early Paleozoic.