File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.2747/0020-6814.48.12.1113
- Scopus: eid_2-s2.0-33845762872
- WOS: WOS:000242519700004
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Role of crustal contamination in formation of the Jinchuan intrusion and its world-class Ni-Cu-(PGE) sulfide deposit, northwest China
Title | Role of crustal contamination in formation of the Jinchuan intrusion and its world-class Ni-Cu-(PGE) sulfide deposit, northwest China |
---|---|
Authors | |
Issue Date | 2006 |
Publisher | Taylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR |
Citation | International Geology Review, 2006, v. 48 n. 12, p. 1113-1132 How to Cite? |
Abstract | The Jinchuan ultramafic body on the southwestern margin of the North China craton hosts a giant Ni-Cu-(PGE) deposit. This dike-like intrusion consists mainly of lherzolite, dunite, and minor pyroxenite. Fortly-seven vol% of the intrusion is composed of disseminated sulfide ore and minor massive and net-textured ores. Ore bodies occur commonly in the lower part of the intrusion; the largest contains about 50% of the total metallic resources in Jinchuan, and has a "flame-like" shape in vertical cross-section. The ultramafic rocks have high MgO (19-45 wt%), low CaO (<6.5 wt%) and Al2O3 (<7 wt%), and right-inclined chondrite-normalized REE patterns. These rocks contain variable Ir (0.4-17 ppb), Ru (0.6-21 ppb), Rh (0.05-8.4 ppb), Pt (0.6-196 ppb), and Pd (1.2-135 ppb), in general lower than those in the sulfide ores (2.9-110 ppb Ir, 3.3-260 ppb Ru, 1.5-237 ppb Rh, 6.9-3972 ppb Pt, and 15-532 ppb Pd). They have high Th/Nb (0.15-0.5) ratios and show primitive mantle-normalized trace element patterns with Nb-Ta negative anomalies, consistent with derivation from mantle magmas variably contaminated by crustal materials. Compositional heterogeneity of the disseminated sulfides cannot be accounted for by in-situ fractional crystallization, but is consistent with differentiation and sulfide segregation in a staging magma chamber at depth. We propose a compressive tectonic model in which injection of sulfide-poor, crystal-rich magmas from the upper part of the staging magma chamber was followed by injection of a sulfide-rich crystal-mush from the lower part of the staging magma chamber to form the Jinchuan body. Copyright © 2006 by V. H. Winston & Son, Inc. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/72421 |
ISSN | 2023 Impact Factor: 2.1 2023 SCImago Journal Rankings: 0.927 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Song, XY | en_HK |
dc.contributor.author | Zhou, MF | en_HK |
dc.contributor.author | Wang, CY | en_HK |
dc.contributor.author | Qi, L | en_HK |
dc.contributor.author | Zhang, CJ | en_HK |
dc.date.accessioned | 2010-09-06T06:41:38Z | - |
dc.date.available | 2010-09-06T06:41:38Z | - |
dc.date.issued | 2006 | en_HK |
dc.identifier.citation | International Geology Review, 2006, v. 48 n. 12, p. 1113-1132 | en_HK |
dc.identifier.issn | 0020-6814 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/72421 | - |
dc.description.abstract | The Jinchuan ultramafic body on the southwestern margin of the North China craton hosts a giant Ni-Cu-(PGE) deposit. This dike-like intrusion consists mainly of lherzolite, dunite, and minor pyroxenite. Fortly-seven vol% of the intrusion is composed of disseminated sulfide ore and minor massive and net-textured ores. Ore bodies occur commonly in the lower part of the intrusion; the largest contains about 50% of the total metallic resources in Jinchuan, and has a "flame-like" shape in vertical cross-section. The ultramafic rocks have high MgO (19-45 wt%), low CaO (<6.5 wt%) and Al2O3 (<7 wt%), and right-inclined chondrite-normalized REE patterns. These rocks contain variable Ir (0.4-17 ppb), Ru (0.6-21 ppb), Rh (0.05-8.4 ppb), Pt (0.6-196 ppb), and Pd (1.2-135 ppb), in general lower than those in the sulfide ores (2.9-110 ppb Ir, 3.3-260 ppb Ru, 1.5-237 ppb Rh, 6.9-3972 ppb Pt, and 15-532 ppb Pd). They have high Th/Nb (0.15-0.5) ratios and show primitive mantle-normalized trace element patterns with Nb-Ta negative anomalies, consistent with derivation from mantle magmas variably contaminated by crustal materials. Compositional heterogeneity of the disseminated sulfides cannot be accounted for by in-situ fractional crystallization, but is consistent with differentiation and sulfide segregation in a staging magma chamber at depth. We propose a compressive tectonic model in which injection of sulfide-poor, crystal-rich magmas from the upper part of the staging magma chamber was followed by injection of a sulfide-rich crystal-mush from the lower part of the staging magma chamber to form the Jinchuan body. Copyright © 2006 by V. H. Winston & Son, Inc. All rights reserved. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Taylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR | en_HK |
dc.relation.ispartof | International Geology Review | en_HK |
dc.title | Role of crustal contamination in formation of the Jinchuan intrusion and its world-class Ni-Cu-(PGE) sulfide deposit, northwest China | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-6814&volume=48&issue=12&spage=1113&epage=1132&date=2006&atitle=Role+of+crustal+contamination+in+formation+of+the+Jinchuan+intrusion+and+its+world-class+Ni-Cu-(PGE)+sulfide+deposit,+northwest+China | en_HK |
dc.identifier.email | Zhou, MF:mfzhou@hkucc.hku.hk | en_HK |
dc.identifier.authority | Zhou, MF=rp00844 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.2747/0020-6814.48.12.1113 | en_HK |
dc.identifier.scopus | eid_2-s2.0-33845762872 | en_HK |
dc.identifier.hkuros | 167292 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-33845762872&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 48 | en_HK |
dc.identifier.issue | 12 | en_HK |
dc.identifier.spage | 1113 | en_HK |
dc.identifier.epage | 1132 | en_HK |
dc.identifier.isi | WOS:000242519700004 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Song, XY=7402269092 | en_HK |
dc.identifier.scopusauthorid | Zhou, MF=7403506005 | en_HK |
dc.identifier.scopusauthorid | Wang, CY=34976092700 | en_HK |
dc.identifier.scopusauthorid | Qi, L=7202149924 | en_HK |
dc.identifier.scopusauthorid | Zhang, CJ=7405496025 | en_HK |
dc.identifier.issnl | 0020-6814 | - |