中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
Secular evolution of the lithospheric mantle beneath the northern margin of the North China Craton: Insights from zoned olivine xenocrysts in Early Cretaceous basalts

文献类型：期刊论文

作者Xu, Yao2; Zhang, Hongfu1,2
刊名GEOLOGICAL SOCIETY OF AMERICA BULLETIN
出版日期2020-11-01
卷号132期号:11-12页码:2353-2366
ISSN号0016-7606
DOI10.1130/B35443.1
英文摘要Abundant zoned olivine xenocrysts from Early Cretaceous basalts of the Yixian Formation in western Liaoning Province, China, contain critical information about the nature and evolution of the lithospheric mantle of the northern North China Craton. These olivine xenocrysts are large (600-1600 mu m), usually rounded and embayed, with well-developed cracks. Their cores have high and uniform forsterite (Fo) contents (88-91), similar to the peridotitic olivine entrained by regional Cenozoic basalts. Their rims have much lower Fo contents (74-82), comparable to phenocrysts (72-81) in the host basalts. These characteristics reveal that the zoned olivine has been disaggregated from mantle xenoliths and thus can be used to trace the underlying lithospheric mantle at the time of basaltic magmatism. The olivine cores have high oxygen isotope compositions (delta O-18(SMOW) = 5.9-7.0 parts per thousand) relative to the normal mantle value, suggesting that the Early Cretaceous lithospheric mantle was enriched and metasomatized mainly by melts/fluids released from subducted oceanic crust that had experienced low-temperature hydrothermal alteration. Preservation of zoned olivine xenocrysts in the Early Cretaceous basalts indicates that olivine-melt/fluid reaction could have been prevalent in the lithospheric mantle as an important mechanism for the transformation from old refractory (high-Mg) peridotitic mantle to young, fertile (low-Mg), and enriched lithospheric mantle during the early Mesozoic.
WOS关键词OXYGEN-ISOTOPE HETEROGENEITY ; PERIDOTITE-MELT REACTION ; ASIAN OROGENIC BELT ; SINO-KOREAN CRATON ; OCEANIC-CRUST ; CONTINENTAL-CRUST ; TRACE-ELEMENT ; GEOCHEMICAL CONSTRAINTS ; MESOZOIC MAGMATISM ; MINERAL CHEMISTRY
资助项目National Natural Science Foundation of China[41688103]
WOS研究方向Geology
语种英语
WOS记录号WOS:000588959000008
出版者GEOLOGICAL SOC AMER, INC
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/99868]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang, Hongfu
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Yao,Zhang, Hongfu. Secular evolution of the lithospheric mantle beneath the northern margin of the North China Craton: Insights from zoned olivine xenocrysts in Early Cretaceous basalts[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(11-12):2353-2366.
APA Xu, Yao,&Zhang, Hongfu.(2020).Secular evolution of the lithospheric mantle beneath the northern margin of the North China Craton: Insights from zoned olivine xenocrysts in Early Cretaceous basalts.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(11-12),2353-2366.
MLA Xu, Yao,et al."Secular evolution of the lithospheric mantle beneath the northern margin of the North China Craton: Insights from zoned olivine xenocrysts in Early Cretaceous basalts".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.11-12(2020):2353-2366.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

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。