|本期目录/Table of Contents|

[1]赵强,汤静如,杨恒毅,等.佳木斯地块中部晚三叠世埃达克岩年代学、地球化学特征及其地质意义[J].地球科学与环境学报,2023,45(XX):1-16.[doi:10.19814/j.jese.2022.02007]
　ZHAO Qiang,TANG Jing-ru,YANG Heng-yi,et al.Geochronology and Geochemistry of Late Triassic Adakite in the Central Jiamusi Block,China and Their Geological Significance[J].Journal of Earth Sciences and Environment,2023,45(XX):1-16.[doi:10.19814/j.jese.2022.02007]
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佳木斯地块中部晚三叠世埃达克岩年代学、地球化学特征及其地质意义(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第45卷
期数:
2023年第XX期
页码:
1-16
栏目:
出版日期:
2023-03-31

文章信息/Info

Title:
Geochronology and Geochemistry of Late Triassic Adakite in the Central Jiamusi Block,China and Their Geological Significance
作者:
赵强; 汤静如; 杨恒毅; 张学琳; 罗林菊
1.桂林理工大学地球科学学院;2.合肥工业大学资源与环境工程学院
Author(s):
ZHAO Qiang; TANG Jing-ru; YANG Heng-yi; ZHANG Xue-lin; LUO Lin-ju
关键词:
埃达克岩; 地球化学; 晚三叠世; 锆石U-Pb年龄; 花岗岩; 佳木斯地块
Keywords:
adakite; geochemistry; Late Triassic; zircon U-Pb age; granite; Jiamusi block
分类号:
-
DOI:
10.19814/j.jese.2022.02007
文献标志码:
A
摘要:
大八浪岩体位于佳木斯地块中部的桦南隆起区，岩性为中细粒黑云母花岗闪长岩，其侵入到晚二叠世白云母二长花岗岩中。岩石LA-ICP-MS锆石U-Pb年龄为(234±1)Ma，属于晚三叠世早期。大八浪岩体具有较高的SiO2含量(质量分数，下同)(62.04%～64.30%)、Al2O3含量(15.68%～16.95%)、Sr/Y值(23.38～36.15)、(La/Yb)N值(18.57～33.04)，较低的MgO含量(0.91%～1.20%)和中等Mg#值(34.03～37.27)，以及低Yb含量((1.18～1.52)×10-6，平均值为1.30×10-6)、Y含量((15.43～20.50)×10-6，平均值为16.94×10-6)，同时Na2O/K2O值为0.77～1.06，平均值为0.94，显示与C型埃达克岩相似的地球化学特征。结合佳木斯地块东缘二叠世处在活动大陆边缘弧环境以及佳木斯地块晚三叠世周缘增生杂岩的分布特点，认为大八浪岩体可能是晚三叠世在古太平洋板块向佳木斯地块下部俯冲，造成佳木斯地块不断缩短加厚，其下地壳发生部分熔融的产物。
Abstract:
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参考文献/References:

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更新日期/Last Update: 2023-02-24