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
Paleomagnetic Constraints From 925 Ma Mafic Dykes in North China and Brazil: Implications for the Paleogeography of Rodinia

文献类型：期刊论文

作者Hu, Yuyang2,4; Zhao, Xixi1; Peng, Peng5; Yang, Fengli2,4; D'Agrella-Filho, Manoel S.3; Chen, Weiwei2,4; Xu, Mingchen2,4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2022-09-01
卷号127期号:9页码:22
ISSN号2169-9313
关键词supercontinent Rodinia mafic dykes Paleomagnetism North China Craton Sao Francisco Craton
DOI10.1029/2022JB025079
英文摘要Coeval Neoproterozoic mafic dykes with a well-constrained isotopic age of 925 Ma are distributed in the North China Craton (NCC) of China and Sao Francisco Craton (SFC) of Brazil. Several recent studies favor the hypothesis that these two cratons were connected during 925 Ma and constituted building cratons for the supercontinent Rodinia. However, the paleo-positions of the two cratons in Rodinia have not yet been paleomagnetically resolved. This paper presents the paleomagnetic results of these dykes in both NCC and SFC. Detailed thermal and alternating-field demagnetization revealed that these dykes record stable components of magnetization with unblocking temperatures below the Curie temperature of magnetite. Rock magnetic results and scanning electron microscope analysis further confirm that the major magnetic minerals in dyke samples are pseudo-single domain titanomagnetites. The mean directions of the characteristic remanent magnetization (ChRM) of the dykes are distinct from those of rocks of different ages in the sampling localities, and are supported by positive baked contact tests, indicating primary remanent magnetization. The ChRM of the SFC dykes also exhibits dual polarity. Our results suggest that the NCC and SFC were in the moderate to high paleolatitudes of the Southern Hemisphere during approximately 925 Ma, suggesting a possible paleogeographic connection between the two cratons. A new paleogeographic reconstruction of both cratons during 925 Ma is proposed, which is supported by other geological evidence.
WOS关键词SAO-FRANCISCO CRATON ; LARGE IGNEOUS PROVINCES ; UNITED-STATES ; BAHIA STATE ; BREAK-UP ; SWARMS ; BLOCK ; RECONSTRUCTION ; PETROGENESIS ; HISTORY
资助项目National Natural Science Foundation of China[41874076] ; National Natural Science Foundation of China[41890833] ; National Natural Science Foundation of China[92158207] ; National Key Research & Development Project[2016YFC0601005] ; National Natural Science Foundation of China[41874076] ; National Natural Science Foundation of China[41890833] ; National Natural Science Foundation of China[92158207] ; National Key Research & Development Project[2016YFC0601005]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000861868500001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Project ; National Key Research & Development Project
源URL[http://ir.iggcas.ac.cn/handle/132A11/108331]  
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Zhao, Xixi; Yang, Fengli
作者单位1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
2.Tongji Univ, Sch Ocean & Earth Sci, Shanghai, Peoples R China
3.Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo, Brazil
4.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Yuyang,Zhao, Xixi,Peng, Peng,et al. Paleomagnetic Constraints From 925 Ma Mafic Dykes in North China and Brazil: Implications for the Paleogeography of Rodinia[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2022,127(9):22.
APA Hu, Yuyang.,Zhao, Xixi.,Peng, Peng.,Yang, Fengli.,D'Agrella-Filho, Manoel S..,...&Xu, Mingchen.(2022).Paleomagnetic Constraints From 925 Ma Mafic Dykes in North China and Brazil: Implications for the Paleogeography of Rodinia.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,127(9),22.
MLA Hu, Yuyang,et al."Paleomagnetic Constraints From 925 Ma Mafic Dykes in North China and Brazil: Implications for the Paleogeography of Rodinia".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 127.9(2022):22.

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。