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Article: Preliminary early cretaceous paleomagnetic results from the Gansu Corridor, China

TitlePreliminary early cretaceous paleomagnetic results from the Gansu Corridor, China
Authors
Issue Date1995
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth and Planetary Science Letters, 1995, v. 129 n. 1-4, p. 217-232 How to Cite?
AbstractWe report results from our paleomagnetic study of Lower Cretaceous redbeds from the Gansu Corridor, northwestern China. The characteristic remanent magnetization (ChRM) resides in hematite, often at very high unblocking temperatures (> 660°C). The directions associated with this component exhibit only reversed polarities from locality A (Sunan area), but the samples from locality B (Lanzhou area, 480 km to the southeast) show roughly antipodal normal and reversed polarities. The combined sample directional data from both localities pass a fold test at the 99% confidence level. The mean paleomagnetic pole is located at 48.7°N, 199.7°E, with A95 = 4.1°, which is discordant with poles of similar age elsewhere from neighboring regions in China. Although represented by relatively few samples (N = 21) this pole suggests that significant post-Cretaceous motion may have occurred between the Gansu Corridor and adjacent blocks. Relative to Eurasia or North China, the discordance corresponds to 28.1 ± 5.2° or 35.6° ± 9.7° clockwise rotation and 9.5° ± 4.5° or 9.8° ± 8.2° northward displacement respectively. The rotations support, but do not yet distinguish between, several neotectonic models assumed to have acted over the past 15-40 m.y. The displacement is not predicted by any of these models; if real, it may have occurred early in the history of the India-Asia collision, or even before. © 1995 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92372
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFrost, GMen_HK
dc.contributor.authorCoe, RSen_HK
dc.contributor.authorMeng, Zen_HK
dc.contributor.authorPeng, Zen_HK
dc.contributor.authorChen, Yen_HK
dc.contributor.authorCourtillot, Ven_HK
dc.contributor.authorPeltzer, Gen_HK
dc.contributor.authorTapponnier, Pen_HK
dc.contributor.authorAvouac, J-Pen_HK
dc.date.accessioned2010-09-17T10:44:07Z-
dc.date.available2010-09-17T10:44:07Z-
dc.date.issued1995en_HK
dc.identifier.citationEarth and Planetary Science Letters, 1995, v. 129 n. 1-4, p. 217-232en_HK
dc.identifier.issn0012-821Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/92372-
dc.description.abstractWe report results from our paleomagnetic study of Lower Cretaceous redbeds from the Gansu Corridor, northwestern China. The characteristic remanent magnetization (ChRM) resides in hematite, often at very high unblocking temperatures (> 660°C). The directions associated with this component exhibit only reversed polarities from locality A (Sunan area), but the samples from locality B (Lanzhou area, 480 km to the southeast) show roughly antipodal normal and reversed polarities. The combined sample directional data from both localities pass a fold test at the 99% confidence level. The mean paleomagnetic pole is located at 48.7°N, 199.7°E, with A95 = 4.1°, which is discordant with poles of similar age elsewhere from neighboring regions in China. Although represented by relatively few samples (N = 21) this pole suggests that significant post-Cretaceous motion may have occurred between the Gansu Corridor and adjacent blocks. Relative to Eurasia or North China, the discordance corresponds to 28.1 ± 5.2° or 35.6° ± 9.7° clockwise rotation and 9.5° ± 4.5° or 9.8° ± 8.2° northward displacement respectively. The rotations support, but do not yet distinguish between, several neotectonic models assumed to have acted over the past 15-40 m.y. The displacement is not predicted by any of these models; if real, it may have occurred early in the history of the India-Asia collision, or even before. © 1995 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epslen_HK
dc.relation.ispartofEarth and Planetary Science Lettersen_HK
dc.titlePreliminary early cretaceous paleomagnetic results from the Gansu Corridor, Chinaen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/0012-821X(94)00244-Sen_HK
dc.identifier.scopuseid_2-s2.0-0028792819en_HK
dc.identifier.volume129en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage217en_HK
dc.identifier.epage232en_HK
dc.identifier.isiWOS:A1995QD56700016-

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