| Nd Isotopic Composition and Material Source of Pre—and Post—Sinian Sedimentary Rocks in Xiushui Area,Jiangxi Province |
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| 引用本文： | 沈谓洲 刘继顺 等. Nd Isotopic Composition and Material Source of Pre—and Post—Sinian Sedimentary Rocks in Xiushui Area,Jiangxi Province[J]. 中国地球化学学报, 1992, 11(1): 80-87. DOI: 10.1007/BF02875660 |
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| 作者姓名： | 沈谓洲 刘继顺 等 |
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| 作者单位： | [1]DepartmentofEarthSciences,NanjingUniversity,Nanjing210008 [2]DepatmentofGeologySouth－CentralUniversityofTechnology,Changsha410012 |
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| 摘 要： | Reported in this paper are the Nd isotopic compositions of the pre-Sinian and Sinian-Cambrian sedimentary rocks in the Xiushui area,Jiangxi Province.Significant differences are noticed between them in their Nd isotopic dompositions.As for the pre-Sinian lightly metmorphozed sedimentary rocks,^143Nd/^144Nd=0.512000-0.512214,CNd(T)=-8.04-9.99,and TDM=18332426Ma are suggested for the Sinian-Cambrian sedimentary rocks .These differences would reflect the diversity of material source for the sedimentary rocks deposited before and after the Sinian period.Mantle material ap-pears to have been involved in the formation of the pre-Sinian sedimentary rocks while the post-Sinian sedimentary rocks are composed mainly of recycled detritus from the continental crust.
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| 关 键 词： | 钕同位素 沉积岩 江西 地质 成因 地壳 |
Nd isotopic composition and material source of pre- and post-Sinian sedimentary rocks in Xiushui area,Jiangxi Province |
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| Hongfei Ling,Weizhou Shen,Bangtong Zhang,Jishun Liu,Jiedong Yang,Xiancong Tao. Nd isotopic composition and material source of pre- and post-Sinian sedimentary rocks in Xiushui area,Jiangxi Province[J]. Chinese Journal of Geochemistry, 1992, 11(1): 80-87. DOI: 10.1007/BF02875660 |
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| Authors: | Hongfei Ling Weizhou Shen Bangtong Zhang Jishun Liu Jiedong Yang Xiancong Tao |
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| Affiliation: | (1) Department of Earth Sciences, Nanjing University, 210008 Nanjing;(2) Department of Geology, South-Central University of Technology, 410012 Changsha;(3) Modern Analysis Centre of Nanjing University, 210008 Nanjing |
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| Abstract: | Reported in this paper are the Nd isotopic compositions of the pre-Sinian and Sinian-Cambrian sedimentary rocks in the Xiushui area, Jiangxi Province. Significant differences are noticed between them in their Nd isotopic compositions. As for the pre-Sinian lightly metamorphozed sedimentary rocks,143Nd/144Nd=0.512000 ∼ 0.512214, ɛNd (T) = −2.57 ∼ 3.91, and TDM=1563 ∼ 1859 Ma;143Nd144Nd=0.511710 ∼ 0.511902, ɛNd(T)= −8.04 ∼ −9.99, and TDM= 1833 ∼ 2426Ma are suggested for the Sinian-Cambrian sedimentary rocks. These differences would reflect the diversity of material source for the sedimentary rocks deposited before and after the Sinian period. Mantle material appears to have been involved in the formation of the pre-Sinian sedimentary rocks while the post-Sinian sedimentary rocks are composed mainly of recycled detritus from the continental crust. This project was financially supported by the National Natural Science Foundation of China. |
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