File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.jseaes.2007.10.018
- Scopus: eid_2-s2.0-43249130143
- WOS: WOS:000256852500004
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Geochemistry of Paleoproterozoic (∼1770 Ma) mafic dikes from the Trans-North China Orogen and tectonic implications
Title | Geochemistry of Paleoproterozoic (∼1770 Ma) mafic dikes from the Trans-North China Orogen and tectonic implications |
---|---|
Authors | |
Keywords | Geochemistry Mafic Dikes Paleoproterozoic Subduction-Related Lithospheric Mantle Trans-North China Orogen |
Issue Date | 2008 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes |
Citation | Journal Of Asian Earth Sciences, 2008, v. 33 n. 1-2, p. 61-77 How to Cite? |
Abstract | Paleoproterozoic (∼1770 Ma) mafic dikes occur throughout the Trans-North China Orogen. These dikes can be divided into three geochemically distinct groups. Group 1 with FeOt of 12.73-18.06%, (Nb/La) N 0.18-0.39, (Th/La) N of, 0.60-1.24, ε Nd(t) of -5.1 to -2.4, and an enrichment in LILE's and a depletion in HFSE's. Group 2 has flat REEs and incompatible elements patterns, and possesses (Nb/La) N = 0.64-0.87, (Th/La) N = 0.61-1.20 and ε Nd(t) = -1.7 to 1.1. Group 3 has low FeOt contents (8.19-11.57%) and (Th/La) N ratios (0.29-0.72), but similar (Nb/La) N ratios and ε Nd(t) values to those of Group 1. Petrological and geochemical data suggest that these dikes may have originated from different sources. Group 1 could be derived from a "re-fertilized" lithospheric source incorporating a continental basaltic component trapped from a earlier phase of subduction. Group 2 was likely a product of a subduction-modified lithospheric mantle hybridized by recycled gabbroic lower crust. By contrast, Group 3 originated from a mixture of subduction-modified lithospheric mantle with a MORB component. In combination with the available data, we propose that the sources of the mafic dikes were initially modified by the ∼1.85 Ga subduction/collision event that assembled the North China Craton, and partially melted under subsequent rifting in response to the upwelling convective mantle. © 2007 Elsevier Ltd. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/151243 |
ISSN | 2021 Impact Factor: 3.374 2020 SCImago Journal Rankings: 1.317 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wang, Y | en_US |
dc.contributor.author | Zhao, G | en_US |
dc.contributor.author | Cawood, PA | en_US |
dc.contributor.author | Fan, W | en_US |
dc.contributor.author | Peng, T | en_US |
dc.contributor.author | Sun, L | en_US |
dc.date.accessioned | 2012-06-26T06:19:12Z | - |
dc.date.available | 2012-06-26T06:19:12Z | - |
dc.date.issued | 2008 | en_US |
dc.identifier.citation | Journal Of Asian Earth Sciences, 2008, v. 33 n. 1-2, p. 61-77 | en_US |
dc.identifier.issn | 1367-9120 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/151243 | - |
dc.description.abstract | Paleoproterozoic (∼1770 Ma) mafic dikes occur throughout the Trans-North China Orogen. These dikes can be divided into three geochemically distinct groups. Group 1 with FeOt of 12.73-18.06%, (Nb/La) N 0.18-0.39, (Th/La) N of, 0.60-1.24, ε Nd(t) of -5.1 to -2.4, and an enrichment in LILE's and a depletion in HFSE's. Group 2 has flat REEs and incompatible elements patterns, and possesses (Nb/La) N = 0.64-0.87, (Th/La) N = 0.61-1.20 and ε Nd(t) = -1.7 to 1.1. Group 3 has low FeOt contents (8.19-11.57%) and (Th/La) N ratios (0.29-0.72), but similar (Nb/La) N ratios and ε Nd(t) values to those of Group 1. Petrological and geochemical data suggest that these dikes may have originated from different sources. Group 1 could be derived from a "re-fertilized" lithospheric source incorporating a continental basaltic component trapped from a earlier phase of subduction. Group 2 was likely a product of a subduction-modified lithospheric mantle hybridized by recycled gabbroic lower crust. By contrast, Group 3 originated from a mixture of subduction-modified lithospheric mantle with a MORB component. In combination with the available data, we propose that the sources of the mafic dikes were initially modified by the ∼1.85 Ga subduction/collision event that assembled the North China Craton, and partially melted under subsequent rifting in response to the upwelling convective mantle. © 2007 Elsevier Ltd. All rights reserved. | en_US |
dc.language | eng | en_US |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes | en_US |
dc.relation.ispartof | Journal of Asian Earth Sciences | en_US |
dc.subject | Geochemistry | en_US |
dc.subject | Mafic Dikes | en_US |
dc.subject | Paleoproterozoic | en_US |
dc.subject | Subduction-Related Lithospheric Mantle | en_US |
dc.subject | Trans-North China Orogen | en_US |
dc.title | Geochemistry of Paleoproterozoic (∼1770 Ma) mafic dikes from the Trans-North China Orogen and tectonic implications | en_US |
dc.type | Article | en_US |
dc.identifier.email | Wang, Y: yjwang@gig.ac.cn | en_US |
dc.identifier.email | Zhao, G: gzhao@hkucc.hku.hk | - |
dc.identifier.email | Sun, M: minsun@hku.hk | - |
dc.identifier.authority | Zhao, G=rp00842 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.jseaes.2007.10.018 | en_US |
dc.identifier.scopus | eid_2-s2.0-43249130143 | en_US |
dc.identifier.hkuros | 144309 | - |
dc.identifier.volume | 33 | en_US |
dc.identifier.issue | 1-2 | en_US |
dc.identifier.spage | 61 | en_US |
dc.identifier.epage | 77 | en_US |
dc.identifier.isi | WOS:000256852500004 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Wang, Y=36496272800 | en_US |
dc.identifier.scopusauthorid | Zhao, G=7403296321 | en_US |
dc.identifier.scopusauthorid | Cawood, PA=7004146041 | en_US |
dc.identifier.scopusauthorid | Fan, W=7401635313 | en_US |
dc.identifier.scopusauthorid | Peng, T=7201447871 | en_US |
dc.identifier.scopusauthorid | Sun, L=37017386300 | en_US |
dc.identifier.issnl | 1367-9120 | - |