GYIG OpenIR  > 矿床地球化学国家重点实验室
Geochronological, geochemical and Nd–Hf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China
Jiao-Long Zhao;  Jian-Sheng Qiu;  Liang Liu;  Rui-Qiang Wang
2015
发表期刊Journal of Asian Earth Sciences
卷号105页码:338-359
摘要

We present comprehensive petrological, geochronological, major and trace element, and Nd–Hf isotopic data for the Baishishan, Jingangshan, and Wushan granitic plutons on the southeastern coast of Fujian Province, South China, with the aims of elucidating their origin and gaining new insights into the petrogenesis of aluminous A-type granites. Zircon U–Pb ages obtained by laser ablation–inductively coupled plasma–mass spectrometry show that the three investigated plutons were emplaced at 92–86 Ma, indicating that they were generated during a Late Cretaceous magmatic event. The granites from the three plutons are composed mainly of perthite, quartz, plagioclase, and minor biotite; they have high SiO2 contents, and low CaO, MnO, Fe2O3tot, and MgO contents, and show a metaluminous to slightly peraluminous signature. The granites are enriched in some large ion lithophile elements (e.g., Rb, Th, and U) and high field strength elements (e.g., Nb and Ta) with elevated Ga/Al ratios, and spidergrams show strong depletions in Ba, Sr, Ti, and P. Chondrite-normalized REE patterns show relative enrichments in light rare earth elements, flat heavy rare earth element profiles, and strongly negative Eu anomalies. These mineralogical and geochemical characteristics suggest that all three plutons can be classified as aluminous A-type granites. The plutons exhibit nearly identical whole-rock Nd and zircon Hf isotopic compositions, and yield Mesoproterozoic two-stage model ages (1.4–1.1 Ga) for both Nd and Hf isotopes. Based on a synthesis of the geochemical and isotopic data and petrogenetic modelling, we suggest that these A-type granitic rocks were most likely formed by variable degrees of fractional crystallization of magmas produced by the partial melting of a tonalitic to granodioritic source, with plagioclase-rich residual phases in the middle to lower crust, and emplaced at shallow crustal levels along the Changle–Nan’ao Fault. Our data on the Baishishan, Jingangshan, and Wushan granites, coupled with previous studies of Cretaceous magmatism in coastal areas of SE China, indicate that a gradually intensifying regional extension took place in the region during the late Yanshanian (Cretaceous), which peaked during the Late Cretaceous in response to the roll-back of the Palaeo-Pacific plate. Consequently, we conclude that the generation of A-type granites was related to intensive tectonic extension along the Changle–Nan’ao Fault and the induced underplating of mantle-derived magma.

关键词Aluminous A-type Granites zircon U–pb Ages geochemistry petrogenesis southeastern Coast Of Fujian Province south China
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9546
专题矿床地球化学国家重点实验室
作者单位1.State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
推荐引用方式
GB/T 7714
Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang. Geochronological, geochemical and Nd–Hf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China[J]. Journal of Asian Earth Sciences,2015,105:338-359.
APA Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang.(2015).Geochronological, geochemical and Nd–Hf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China.Journal of Asian Earth Sciences,105,338-359.
MLA Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang."Geochronological, geochemical and Nd–Hf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China".Journal of Asian Earth Sciences 105(2015):338-359.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Geochronological, ge(5992KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang]的文章
百度学术
百度学术中相似的文章
[Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang]的文章
必应学术
必应学术中相似的文章
[Jiao-Long Zhao;Jian-Sheng Qiu;Liang Liu;Rui-Qiang Wang]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Geochronological, geochemical and Nd–Hf isotopic constraints on the petrogenesis of Late Cretaceous A-type granites from the southeastern coast of Fujian Province, South China.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。