Early Paleozoic subduction processes of the Paleo-Asian Ocean: Insights from geochronology and geochemistry of Paleozoic plutons in the Alxa Terrane
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- 作者：Qian Liua ; Guochun Zhaoa ; gzhao@hkucc.hku.hk" class="auth_mail" title="E-mail the corresponding author ; Min Suna ; Yigui Hana ; Paul R. Eizenhö ; ferb ; Wenzhu Houa ; Xiaoran Zhanga ; Yanlin Zhua ; Bo Wangc ; Dongxing Liuc ; Bing Xuc
- 关键词：Paleozoic ; Zircon U-Pb-Hf isotopes ; Whole-rock geochemistry ; Sr-Nd isotopes ; Alxa Terrane ; North China Craton
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：262
- 期：Complete
- 页码：546-560
- 全文大小：3118 K
文摘
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458–407 Ma diorites and granitoids were recognized in the Alxa Terrane.
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458–440 Ma and 417–407 Ma groups have different geochemistry and petrogeneses.
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Southward subduction of the Paleo-Asian Ocean commenced in the early Paleozoic.
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A tectonic switch from advancing to retreating subduction occurred at ~ 407 Ma.
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The Alxa had a close link with the North China Craton since the early Paleozoic.