Paleointensity study of Early Miocene lavas from Pingzhuang, Inner Mongolia, China

doi:10.1029/2002GL015990

	Paleointensity study of Early Miocene lavas from Pingzhuang, Inner Mongolia, China
	Shi, RP ; Zhu, RX ; Pan, YX ; Shi, GH ; Hoffman, KA
刊名	GEOPHYSICAL RESEARCH LETTERS
	2002-11-01
卷号	29 期号:21
ISSN号	0094-8276
DOI	10.1029/2002GL015990
文献子类	Article
英文摘要	A paleomagnetic and geochronologic investigation has been conducted on 17 lava flows from Inner Mongolia, north China. Radiometric K-Ar dating experiments give an age between 23 and 22 Ma for these volcanic units. Rock magnetic measurements of thermomagnetic curves and hysteresis loops show the primary carrier of remanence to be pseudo-single domain titanomagnetite. Stepwise thermal demagnetization isolated a well-defined direction of characteristic remanent magnetization (ChRM) in all studied lava flows with a mean direction of D/I=359.8degrees/62.2degrees (alpha95=3.8degrees). Fifty samples from 11 lavas were preselected on the basis of thermomagnetic analyses to carry out Thellier-Thellier paleointensity experiments with systematic partial thermoremanent magnetization (pTRM) checks. Twenty-three samples from 7 lavas yield reliable paleointensity estimates with a mean virtual dipole moment (VDM) of (3.9+/-0.9)x10(22) Am-2, about half the strength of the modern-day field.
WOS关键词	EARTHS MAGNETIC-FIELD ; GEOMAGNETIC PALEOINTENSITY ; ABSOLUTE PALEOINTENSITY ; INTENSITY ; PALEOMAGNETISM ; REVERSALS ; TERTIARY ; STRENGTH ; BASALTS ; HAWAII
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000180611900022
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/77531]
专题	中国科学院地质与地球物理研究所
通讯作者	Shi, RP
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism Lab, Beijing 100029, Peoples R China 2.California Polytech STate Univ San Luis Obispo, Dept Phys, San Luis Obispo, CA USA
推荐引用方式 GB/T 7714	Shi, RP,Zhu, RX,Pan, YX,et al. Paleointensity study of Early Miocene lavas from Pingzhuang, Inner Mongolia, China[J]. GEOPHYSICAL RESEARCH LETTERS,2002,29(21).
APA	Shi, RP,Zhu, RX,Pan, YX,Shi, GH,&Hoffman, KA.(2002).Paleointensity study of Early Miocene lavas from Pingzhuang, Inner Mongolia, China.GEOPHYSICAL RESEARCH LETTERS,29(21).
MLA	Shi, RP,et al."Paleointensity study of Early Miocene lavas from Pingzhuang, Inner Mongolia, China".GEOPHYSICAL RESEARCH LETTERS 29.21(2002).