A comparison of archaeointensity results from Chinese ceramics using microwave and conventional Thellier's and Shaw's methods

	A comparison of archaeointensity results from Chinese ceramics using microwave and conventional Thellier's and Shaw's methods
	Shaw, J ; Yang, S ; Rolph, TC ; Sun, FY
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	1999-03-01
卷号	136 期号:3 页码:714-718
关键词	archaeomagnetism ceramics China microwaves palaeointensity
ISSN号	0956-540X
文献子类	Article
英文摘要	Palaeo- and archaeointensity determinations of the geomagnetic field are limited by mineralogical alteration that may occur when samples are heated in the laboratory to produce a TRM (Thellier & Thellier 1959; Shaw 1974). By using microwave excitation of the magnetic grains we have been able to create a TRM without significantly heating the bulk samples, thereby avoiding thermal alteration (Walton et al. 1993; Shaw et al. 1996). When applied to Peruvian ceramics in a manner analogous to the standard Thellier method, the microwave technique was found to reduce the scatter dramatically in the archaeointensity results (Shaw et al. 1996). In the present study we apply this microwave technique to a collection of Chinese ceramics covering the time interval 270-7500 yr BP. These ceramics have already been investigated using adaptations of both Thellier's (Coe 1967) and Shaw's (Rolph & Shaw 1985) palaeointensity methods (Yang et al. 1993a). Although an acceptable agreement was found between those two methods, the equivalent virtual axial dipole moments (VADMs) were significantly lower than for the global model of McElhinny & Senanayake (1982). The present study, using the microwave technique with cooling-rate correction, has provided more consistent VADMs, and is much closer to the global model.
WOS关键词	EARTHS MAGNETIC-FIELD ; GEOMAGNETIC INTENSITY ; POTTERY ; HYSTERESIS ; DEPENDENCE ; MAGNITUDE ; SAMPLES ; LAVAS ; SIZE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	BLACKWELL SCIENCE LTD
WOS记录号	WOS:000079145700016
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/75280]
专题	中国科学院地质与地球物理研究所
通讯作者	Shaw, J
作者单位	1.Univ Liverpool, Dept Earth Sci, Geomagnetism Lab, Liverpool L69 3BX, Merseyside, England 2.Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Shaw, J,Yang, S,Rolph, TC,et al. A comparison of archaeointensity results from Chinese ceramics using microwave and conventional Thellier's and Shaw's methods[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,1999,136(3):714-718.
APA	Shaw, J,Yang, S,Rolph, TC,&Sun, FY.(1999).A comparison of archaeointensity results from Chinese ceramics using microwave and conventional Thellier's and Shaw's methods.GEOPHYSICAL JOURNAL INTERNATIONAL,136(3),714-718.
MLA	Shaw, J,et al."A comparison of archaeointensity results from Chinese ceramics using microwave and conventional Thellier's and Shaw's methods".GEOPHYSICAL JOURNAL INTERNATIONAL 136.3(1999):714-718.