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Article: Paleomagnetism of Late Mesozoic granitic intrusions in Hong Kong: implications for Upper Cretaceous reference pole of South China

TitlePaleomagnetism of Late Mesozoic granitic intrusions in Hong Kong: implications for Upper Cretaceous reference pole of South China
Authors
Issue Date1991
Citation
Journal Of Geophysical Research, 1991, v. 96 B1, p. 327-335 How to Cite?
AbstractTwo Late Jurassic-early Cretaceous granite plutons in Hong Kong were sampled at 16 sites for paleomagnetic determination. The two granites show differences in magnetic properties and mineralogy but similar natural remanent magnetization (NRM) directions. Multiple magnetizations and dual polarity have been detected in the samples. Isothermal remanent magnetism, magnetic susceptibility, and coercivity measurements reveal multidomain titanomagnetite as the principal magnetic carrier. The pole position from 12 sample sites is 171.9°E, 78.2°N, A95=10.6°. The dual polarity and cooling ages of the granites suggest a Late Cretaceous acquisition of the remanent magnetism. Based on four different studies, the Upper Cretaceous reference pole of South China is located at 194.3° longitude, 73.5°N latitude, A95=10.4°. Paleomagnetic results from North China, South China, and Eurasia show no large-scale Cenozoic relative movements among the three blocks, but the small separation between the paleomagnetic poles of South China and Eurasia probably implies a minor relative movement since the Late Cretaceous. -from Author
Persistent Identifierhttp://hdl.handle.net/10722/150952
ISSN
2015 Impact Factor: 3.318
2015 SCImago Journal Rankings: 2.310

 

DC FieldValueLanguage
dc.contributor.authorChan, LSen_US
dc.date.accessioned2012-06-26T06:15:11Z-
dc.date.available2012-06-26T06:15:11Z-
dc.date.issued1991en_US
dc.identifier.citationJournal Of Geophysical Research, 1991, v. 96 B1, p. 327-335en_US
dc.identifier.issn0148-0227en_US
dc.identifier.urihttp://hdl.handle.net/10722/150952-
dc.description.abstractTwo Late Jurassic-early Cretaceous granite plutons in Hong Kong were sampled at 16 sites for paleomagnetic determination. The two granites show differences in magnetic properties and mineralogy but similar natural remanent magnetization (NRM) directions. Multiple magnetizations and dual polarity have been detected in the samples. Isothermal remanent magnetism, magnetic susceptibility, and coercivity measurements reveal multidomain titanomagnetite as the principal magnetic carrier. The pole position from 12 sample sites is 171.9°E, 78.2°N, A95=10.6°. The dual polarity and cooling ages of the granites suggest a Late Cretaceous acquisition of the remanent magnetism. Based on four different studies, the Upper Cretaceous reference pole of South China is located at 194.3° longitude, 73.5°N latitude, A95=10.4°. Paleomagnetic results from North China, South China, and Eurasia show no large-scale Cenozoic relative movements among the three blocks, but the small separation between the paleomagnetic poles of South China and Eurasia probably implies a minor relative movement since the Late Cretaceous. -from Authoren_US
dc.languageengen_US
dc.relation.ispartofJournal of Geophysical Researchen_US
dc.titlePaleomagnetism of Late Mesozoic granitic intrusions in Hong Kong: implications for Upper Cretaceous reference pole of South Chinaen_US
dc.typeArticleen_US
dc.identifier.emailChan, LS:chanls@hku.hken_US
dc.identifier.authorityChan, LS=rp00665en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0025960714en_US
dc.identifier.volume96en_US
dc.identifier.issueB1en_US
dc.identifier.spage327en_US
dc.identifier.epage335en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChan, LS=7403540528en_US

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