气候变化领域集成服务门户(CCPortal): Examples of tectonic overprints of magnetic fabrics in rocks of the Bohemian Massif and Western Carpathians

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DOI	10.1007/s00531-019-01786-8
	Examples of tectonic overprints of magnetic fabrics in rocks of the Bohemian Massif and Western Carpathians
	Hrouda F.; Chadima M.
发表日期	2020
ISSN	14373254
起始页码	1321
结束页码	1336
卷号	109 期号:4
英文摘要	The magnetic fabrics in sedimentary, volcanic, and plutonic rocks primarily originate during deposition, lava or ash flow, and magma flow, respectively. During later rock development, these magnetic fabrics can be overprinted by various processes among which regional metamorphism and ductile deformation tectonic in origin are probably the most frequent and important. During the overprinting, the degree of anisotropy in general increases with progressing deformation and the magnetic foliations and magnetic lineations are reoriented from the primary directions towards parallelism to the doubtless deformational fabric elements in the body considered or in surrounding rocks. Because of the second rank tensor character of the anisotropy of magnetic susceptibility (AMS) it is often difficult to recognize whether a particular magnetic fabric was overprinted or not. The identification techniques of the magnetic fabric overprints on the site scale were developed, which are based on the investigation of the relationship between the magnetic fabric and orientations of mesoscopic fabric elements whose origin is known (bedding, cleavage, metamorphic foliation, mineral lineation, fold axis, etc.) and on the investigation of fabric relationship between geological units of different origins, because the AMS can be measured with sufficient precision in virtually all rock types. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Bohemian Massif; Magnetic anisotropy; Tectonic overprint; Western Carpathians
语种	英语
scopus关键词	magnetic anisotropy; magnetic fabric; magnetic susceptibility; petrogenesis; petrology; tectonic evolution; tectonic setting; Bohemian Massif; Carpathians; Western Carpathians
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147683
作者单位	AGICO Ltd., Ječná 29a, Brno, 621 00, Czech Republic; Faculty of Sciences, Charles University, Albertov 6, Prague, 128 43, Czech Republic; Institute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 135, Prague, 165 00, Czech Republic
推荐引用方式 GB/T 7714	Hrouda F.,Chadima M.. Examples of tectonic overprints of magnetic fabrics in rocks of the Bohemian Massif and Western Carpathians[J],2020,109(4).
APA	Hrouda F.,&Chadima M..(2020).Examples of tectonic overprints of magnetic fabrics in rocks of the Bohemian Massif and Western Carpathians.International Journal of Earth Sciences,109(4).
MLA	Hrouda F.,et al."Examples of tectonic overprints of magnetic fabrics in rocks of the Bohemian Massif and Western Carpathians".International Journal of Earth Sciences 109.4(2020).