File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.epsl.2006.09.003
- Scopus: eid_2-s2.0-33750369419
- WOS: WOS:000242298500012
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Positioning Paleogene Eurasia problem: Solution for 60-50 Ma and broader tectonic implications
Title | Positioning Paleogene Eurasia problem: Solution for 60-50 Ma and broader tectonic implications |
---|---|
Authors | |
Keywords | Eurasia Faroe Inclination shallowing Paleomagnetic Sheppey Tien Shan |
Issue Date | 2006 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl |
Citation | Earth And Planetary Science Letters, 2006, v. 251 n. 1-2, p. 148-155 How to Cite? |
Abstract | Recently published paleomagnetic data from the Faroe Islands and SE England have enabled a "hybrid" pole (72.0°N, 177.9°E, A95 = 7.9°) to be calculated for "stable" Eurasia ∼ 55 Ma. It is somewhat different to previous proposals, being a further 8-9° from the present-day North Pole. A strong positive test of the new pole is provided by 2002-published paleomagnetic data from basaltic rocks in the Tien Shan range in Kyrgyzstan: the paleolatitude derived from the inclination angle matches the predicted value to within 0.2°. An unfortunate drawback with Kyrgyzstan pole is its large age error: ± 15 m.y. for rocks estimated to have formed ∼ 50 Ma. Fortuitously, an alternative test is now available using paleomagnetic data from Paleocene basalts in the Tien Shan range of western China, for which a robust radiometric age-date (59 ± 1 Ma, based on two Ar-Ar results) also exists. Although the locality has experienced a large vertical-axis rotation, the mean declination being 54.5°, the inclination angle appears undisturbed, and the derived paleolatitude matches the value predicted by hybrid pole to within 4.0°. Thus, it is contended, the Faroe-Sheppey pole provides one of the most reliable means of fixing Eurasia's position for the interval 60-50 Ma. It also impacts on various model proposals for the India-Asia collision and subsequent crustal shortening and/or extrusion between southern Tibet and stable Eurasia (north of the Tien Shan). © 2006 Elsevier B.V. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/151198 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 2.294 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ali, JR | en_HK |
dc.contributor.author | Aitchison, JC | en_HK |
dc.date.accessioned | 2012-06-26T06:18:32Z | - |
dc.date.available | 2012-06-26T06:18:32Z | - |
dc.date.issued | 2006 | en_HK |
dc.identifier.citation | Earth And Planetary Science Letters, 2006, v. 251 n. 1-2, p. 148-155 | en_HK |
dc.identifier.issn | 0012-821X | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/151198 | - |
dc.description.abstract | Recently published paleomagnetic data from the Faroe Islands and SE England have enabled a "hybrid" pole (72.0°N, 177.9°E, A95 = 7.9°) to be calculated for "stable" Eurasia ∼ 55 Ma. It is somewhat different to previous proposals, being a further 8-9° from the present-day North Pole. A strong positive test of the new pole is provided by 2002-published paleomagnetic data from basaltic rocks in the Tien Shan range in Kyrgyzstan: the paleolatitude derived from the inclination angle matches the predicted value to within 0.2°. An unfortunate drawback with Kyrgyzstan pole is its large age error: ± 15 m.y. for rocks estimated to have formed ∼ 50 Ma. Fortuitously, an alternative test is now available using paleomagnetic data from Paleocene basalts in the Tien Shan range of western China, for which a robust radiometric age-date (59 ± 1 Ma, based on two Ar-Ar results) also exists. Although the locality has experienced a large vertical-axis rotation, the mean declination being 54.5°, the inclination angle appears undisturbed, and the derived paleolatitude matches the value predicted by hybrid pole to within 4.0°. Thus, it is contended, the Faroe-Sheppey pole provides one of the most reliable means of fixing Eurasia's position for the interval 60-50 Ma. It also impacts on various model proposals for the India-Asia collision and subsequent crustal shortening and/or extrusion between southern Tibet and stable Eurasia (north of the Tien Shan). © 2006 Elsevier B.V. All rights reserved. | en_HK |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl | en_HK |
dc.relation.ispartof | Earth and Planetary Science Letters | en_HK |
dc.rights | Earth and Planetary Science Letters. Copyright © Elsevier BV. | - |
dc.subject | Eurasia | en_HK |
dc.subject | Faroe | en_HK |
dc.subject | Inclination shallowing | en_HK |
dc.subject | Paleomagnetic | en_HK |
dc.subject | Sheppey | en_HK |
dc.subject | Tien Shan | en_HK |
dc.title | Positioning Paleogene Eurasia problem: Solution for 60-50 Ma and broader tectonic implications | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Ali, JR: jrali@hku.hk | en_HK |
dc.identifier.email | Aitchison, JC: jona@hku.hk | en_HK |
dc.identifier.authority | Ali, JR=rp00659 | en_HK |
dc.identifier.authority | Aitchison, JC=rp00658 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.epsl.2006.09.003 | en_HK |
dc.identifier.scopus | eid_2-s2.0-33750369419 | en_HK |
dc.identifier.hkuros | 133640 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-33750369419&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 251 | en_HK |
dc.identifier.issue | 1-2 | en_HK |
dc.identifier.spage | 148 | en_HK |
dc.identifier.epage | 155 | en_HK |
dc.identifier.isi | WOS:000242298500012 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Ali, JR=7102266465 | en_HK |
dc.identifier.scopusauthorid | Aitchison, JC=7102533858 | en_HK |
dc.identifier.issnl | 0012-821X | - |