| 扬子克拉通北缘中、新元古代洋壳俯冲及壳幔再循环作用的同位素地球化学证据 |
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| 引用本文： | 凌文黎,张本仁,张宏飞,骆庭川.扬子克拉通北缘中、新元古代洋壳俯冲及壳幔再循环作用的同位素地球化学证据[J].地球科学,1996(3). |
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| 作者姓名： | 凌文黎 张本仁 张宏飞 骆庭川 |
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| 作者单位： | 地球科学学院 |
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| 基金项目： | 国家自然科学基金,地质矿产部“壳幔体系组成、物质交换及动力学”开放研究实验室联合资助 |
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| 摘 要： | 报道和总结了近期陕西汉中碑坝和西乡地区重要地质体系统同位素年代研究成果，在重新厘定的年代学基础上，就扬子克拉通北缘同位素特征及其地质意义进行剖析，依据该区岩浆作用的上地幔源区性质及演化规律，提出了中、新元古代扬子克拉通北缘存在与现代板块运动类似的洋壳俯冲和壳幔再循环作用的同位素地球化学证据
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| 关 键 词： | 同位素地球化学证据，扬子克拉通北缘，中元古代，新元古代，洋壳俯冲，壳幔再循环 |
AN ISOTOPIC EVIDENCE FOR OCEANIC CRUST SUBDUCTION AND CRUST MANTLE RECYCLING IN MESO NEOPROTEROZOIC ALONG NORTHERN MARGIN OF YANGTZE CRATON |
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| Ling Wenli.AN ISOTOPIC EVIDENCE FOR OCEANIC CRUST SUBDUCTION AND CRUST MANTLE RECYCLING IN MESO NEOPROTEROZOIC ALONG NORTHERN MARGIN OF YANGTZE CRATON[J].Earth Science-Journal of China University of Geosciences,1996(3). |
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| Authors: | Ling Wenli |
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| Abstract: | The systematic study of Rb Sr,Sm Nd and single zircon Pb evaporating dating methods, provides a set of Proterozoic date of chronology on the Beiba and Xixiang districts along the northern margin of Yangtze Craton. Further, the Nd isotopic characteristics and their indications about the continental margin magmatism originated from the regional upper mantle composition and the evolution pattern during Precambrian are discussed on the new background. Isotopic evidence shows that oceanic curst subduction and crust mantle recycling process took place along the northern margin of Yangtze Craton during Meso Neoproterozoic . |
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| Keywords: | isotopic evidence northern margin of Yangtze Craton Mesoproterozoic Neoproterozoic oceanic crust subduction crust mantle recycling |
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