Paleomagnetism of ca. 1.35 Ga sills in northern North China Craton and implications for paleogeographic reconstruction of the Mesoproterozoic supercontinent
文献类型：期刊论文
| 作者 | Chen, Liwei1; Huang, Baochun2; Yi, Zhiyu1; Zhao, Jie1; Yan, Yonggang1 |
| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 228页码:36-47 |
| 关键词 | North China Craton (Ncc) Paleomagnetic Pole Mesoproterozoic Sills Columbia Supercontinent |
| DOI | 10.1016/j.precamres.2013.01.011 |
| 文献子类 | Article |
| 英文摘要 | We report paleomagnetic data on precisely dated Mesoproterozoic sills, in zircon and baddeleyite Pb-207/Ph-206 ages of 1345 +/- 12 and 1353 +/- 14 Ma respectively, intruding the Xiamaling and Wumishan formations in North China with an aim of evaluating how the North China Craton (NCC) was involved in the evolution of the Columbia supercontinent from ca. 1.78 to 1.35 Ga. After systematic thermal demagnetization we isolate a high temperature characteristic remanence from 18 sites with a tilt-corrected site-mean direction of D = 294.4 degrees, I= -31.7 degrees and alpha(95) = 4.3 degrees, corresponding to a mean paleomagnetic pole at lambda = 5.9 degrees N, phi = 359.6 degrees E (N= 18) with angular standard deviation of 10.0 degrees and A(95) = 4.3 degrees. Rock magnetic experiments, light microscopy and scanning electron microscopy all indicate that the main magnetic minerals in the sampled sill rocks are medium sized titanomagnetites. The positive fold test and fresh titanomagnetite grains suggest that the characteristic remanence is likely to be a primary acquired at ca. 135 Ga. The preliminary paleogeography reconstruction based upon the well-matched apparent polar wander paths between the Laurentia-Baltica-Siberia united block and the NCC supports the interpretation that the NCC may have drifted together with this united block before ca. 1.35 Ga during the late history of the Columbia supercontinent. We argue that the NCC was located in low latitudes and kept tight connections with the Siberian and Indian cratons during the interval between ca. 1.8 and 1.35 Ga, and that the ca. 1.35 Ga sills widely developed in the Mesoproterozoic Xiamaling and Wumishan formations, as well as the ca. 13-1.2 Ga magma events well-developed in Siberia and northern margin of the NCC, may represent the complete fragmentation of the NCC with the neighboring cratons. (C) 2013 Elsevier B.V. All rights reserved. |
| WOS关键词 | LIAO-JI BELT ; HIGH-PRESSURE GRANULITES ; PB ZIRCON GEOCHRONOLOGY ; U-PB ; TECTONIC IMPLICATIONS ; WESTERN BLOCK ; EASTERN BLOCK ; DETRITAL ZIRCONS ; PALEOPROTEROZOIC SUPERCONTINENT ; COLUMBIA SUPERCONTINENT |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000317803400003 |
| 资助机构 | NSFC(41190071 ; NSFC(41190071 ; NSFC(41190071 ; NSFC(41190071 ; 41190070) ; 41190070) ; 41190070) ; 41190070) ; NSFC(41190071 ; NSFC(41190071 ; NSFC(41190071 ; NSFC(41190071 ; 41190070) ; 41190070) ; 41190070) ; 41190070) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62631]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Minist Educ, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Liwei,Huang, Baochun,Yi, Zhiyu,et al. Paleomagnetism of ca. 1.35 Ga sills in northern North China Craton and implications for paleogeographic reconstruction of the Mesoproterozoic supercontinent[J]. PRECAMBRIAN RESEARCH,2013,228:36-47. |
| APA | Chen, Liwei,Huang, Baochun,Yi, Zhiyu,Zhao, Jie,&Yan, Yonggang.(2013).Paleomagnetism of ca. 1.35 Ga sills in northern North China Craton and implications for paleogeographic reconstruction of the Mesoproterozoic supercontinent.PRECAMBRIAN RESEARCH,228,36-47. |
| MLA | Chen, Liwei,et al."Paleomagnetism of ca. 1.35 Ga sills in northern North China Craton and implications for paleogeographic reconstruction of the Mesoproterozoic supercontinent".PRECAMBRIAN RESEARCH 228(2013):36-47. |
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。