Palaeomagnetism and Ar-40/Ar-39 age from a Cretaceous volcanic sequence, Inner Mongolia, China: Implications for the field variation during the Cretaceous normal superchron
文献类型：期刊论文
| 作者 | Zhu, Rixiang1; Pan, Yongxin1,2; He, Huaiyu1,2; Qin, Huafeng1; Ren, Shoumai3 |
| 刊名 | PHYSICS OF THE EARTH AND PLANETARY INTERIORS
 |
| 出版日期 | 2008-08-01 |
| 卷号 | 169期号:1-4页码:59-75 |
| 关键词 | Palaeointensity Cretaceous normal superchron Ar-40/Ar-39 dating Inner Mongolia |
| ISSN号 | 0031-9201 |
| DOI | 10.1016/j.pepi.2008.07.025 |
| 文献子类 | Article |
| 英文摘要 | An integrated palaeomagnetic and Ar-40/Ar-39 dating study was carried out on an Early Cretaceous volcanic lava sequence from the Suhongtu section, Inner Mongolia, to determine the field behavior within the Cretaceous normal superchron (CNS). Ar-40/Ar-39 ages were obtained from 12 lava flows, indicating that the studied lava was formed around 114.1 +/- 0.3 Ma for the lower interval and 110.6 +/- 0.1 Ma for the upper interval. Rock-magnetic experiments and electron microprobe analyses indicate that the primary Fe-Ti oxides are the main magnetic carriers. All lava flows carry normal palaeomagnetic directions, which can be grouped into 31 units by an F-test, with a Fisher mean characteristic remanent magnetization (ChRM) of D/I = 12.8/58.6 degrees (alpha(95) = 2.3 degrees). The corresponding palaeomagnetic pole is located at 80.3 degrees N and 200.3 degrees E (A(95) = 3.2 degrees, K= 64.4), which is indistinguishable at the 95% confidence level from the Eurasia pole derived from the apparent polar wander path for the early Cretaceous. Using a modified Thellier palaeointensity method with stringent acceptance criteria, we obtained two time-series of palaeointensity records from 15 independent palaeomagnetic units (total 136 samples). The virtual dipole moment (VDM) values varied from 2.53 X 10(22) Am-2 to 9.92 x 10(22) Am-2. The mean VDMs for the upper and lower intervals are (5.38 +/- 2.06) x 10(22) Am-2 and (4.61 +/- 2.67) x 10(22) Am-2, respectively. The observed time-series of palaeointensity, together with the previously available data for the CNS, suggest that magnetic field strength during the CNS fluctuated significantly with time. (C) 2008 Elsevier B.V. All rights reserved. |
| WOS关键词 | EARTHS MAGNETIC-FIELD ; THELLIER PALEOINTENSITY EXPERIMENTS ; SUBMARINE BASALTIC GLASS ; TRUE POLAR WANDER ; GEOMAGNETIC-FIELD ; NORTHEASTERN CHINA ; INTENSITY ; BEHAVIOR ; KYR ; PALAEOINTENSITIES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000260648700007 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | NSFC(40634024 ; NSFC(40634024 ; CAS project ; CAS project ; 40221402) ; 40221402) ; NSFC(40634024 ; NSFC(40634024 ; CAS project ; CAS project ; 40221402) ; 40221402) ; NSFC(40634024 ; NSFC(40634024 ; CAS project ; CAS project ; 40221402) ; 40221402) ; NSFC(40634024 ; NSFC(40634024 ; CAS project ; CAS project ; 40221402) ; 40221402) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69500]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhu, Rixiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Palaeomagnetism & Geochronol Lab SKL LE, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China 3.Minist Land & Resources, Strateg Res Ctr Oil & Gas Resources, Beijing 100034, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Rixiang,Pan, Yongxin,He, Huaiyu,et al. Palaeomagnetism and Ar-40/Ar-39 age from a Cretaceous volcanic sequence, Inner Mongolia, China: Implications for the field variation during the Cretaceous normal superchron[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2008,169(1-4):59-75. |
| APA | Zhu, Rixiang,Pan, Yongxin,He, Huaiyu,Qin, Huafeng,&Ren, Shoumai.(2008).Palaeomagnetism and Ar-40/Ar-39 age from a Cretaceous volcanic sequence, Inner Mongolia, China: Implications for the field variation during the Cretaceous normal superchron.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,169(1-4),59-75. |
| MLA | Zhu, Rixiang,et al."Palaeomagnetism and Ar-40/Ar-39 age from a Cretaceous volcanic sequence, Inner Mongolia, China: Implications for the field variation during the Cretaceous normal superchron".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 169.1-4(2008):59-75. |
入库方式： OAI收割
来源：地质与地球物理研究所
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