File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.2113/gsecongeo.102.1.75
- Scopus: eid_2-s2.0-34447313367
- WOS: WOS:000246718600004
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Field relationships and geochemical constraints on the emplacement of the Jinchuan intrusion and its Ni-Cu-PGE sulfide deposit, Gansu, China
Title | Field relationships and geochemical constraints on the emplacement of the Jinchuan intrusion and its Ni-Cu-PGE sulfide deposit, Gansu, China |
---|---|
Authors | |
Issue Date | 2007 |
Publisher | Society of Economic Geologists, Inc.. The Journal's web site is located at http://www.segweb.org/publications/journal.aspx |
Citation | Economic Geology, 2007, v. 102 n. 1, p. 75-94 How to Cite? |
Abstract | Field mapping and petrological-geochemical investigation of the Jinchuan intrusion in north-central China clarifies how the intrusion was emplaced and provides a new model that explains how its large and rich Ni-Cu-platinoid deposits may have formed. The intrusion was emplaced into high-grade gneisses and marbles along a disconformity at the base of an overlying cover sequence, indicating that it was emplaced as a sill, not a near-vertical dike, as previously proposed. After emplacement the intrusion was rotated to its present orientation and deformed and metamorphosed under greenschist-facies conditions. Relative enrichment of incompatible trace elements coupled with negative U-Th and Nb-Ta anomalies in all samples from the intrusion provide evidence that the parental magma assimilated granitoid rocks in the lower crust. The presence of abundant marble xenoliths, now decarbonatized to diopside-rich skarns, and chemical indices such as high CaO/SiO 2, indicate that the magma assimilated carbonate on reaching its present site. This contamination may be linked to the formation of the Ni-Cu platinoid ores. We propose that the assimilation of carbonate-rich fluids increased the oxygen fugacity of the magma and led to the segregation of metal-rich sulfides. © 2007 Society of Economic Geologists, Inc. |
Persistent Identifier | http://hdl.handle.net/10722/72753 |
ISSN | 2023 Impact Factor: 5.5 2023 SCImago Journal Rankings: 2.372 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lehmann, J | en_HK |
dc.contributor.author | Arndt, N | en_HK |
dc.contributor.author | Windley, B | en_HK |
dc.contributor.author | Zhou, MF | en_HK |
dc.contributor.author | Wang, CY | en_HK |
dc.contributor.author | Harris, C | en_HK |
dc.date.accessioned | 2010-09-06T06:44:47Z | - |
dc.date.available | 2010-09-06T06:44:47Z | - |
dc.date.issued | 2007 | en_HK |
dc.identifier.citation | Economic Geology, 2007, v. 102 n. 1, p. 75-94 | en_HK |
dc.identifier.issn | 0361-0128 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/72753 | - |
dc.description.abstract | Field mapping and petrological-geochemical investigation of the Jinchuan intrusion in north-central China clarifies how the intrusion was emplaced and provides a new model that explains how its large and rich Ni-Cu-platinoid deposits may have formed. The intrusion was emplaced into high-grade gneisses and marbles along a disconformity at the base of an overlying cover sequence, indicating that it was emplaced as a sill, not a near-vertical dike, as previously proposed. After emplacement the intrusion was rotated to its present orientation and deformed and metamorphosed under greenschist-facies conditions. Relative enrichment of incompatible trace elements coupled with negative U-Th and Nb-Ta anomalies in all samples from the intrusion provide evidence that the parental magma assimilated granitoid rocks in the lower crust. The presence of abundant marble xenoliths, now decarbonatized to diopside-rich skarns, and chemical indices such as high CaO/SiO 2, indicate that the magma assimilated carbonate on reaching its present site. This contamination may be linked to the formation of the Ni-Cu platinoid ores. We propose that the assimilation of carbonate-rich fluids increased the oxygen fugacity of the magma and led to the segregation of metal-rich sulfides. © 2007 Society of Economic Geologists, Inc. | en_HK |
dc.language | eng | en_HK |
dc.publisher | Society of Economic Geologists, Inc.. The Journal's web site is located at http://www.segweb.org/publications/journal.aspx | en_HK |
dc.relation.ispartof | Economic Geology | en_HK |
dc.title | Field relationships and geochemical constraints on the emplacement of the Jinchuan intrusion and its Ni-Cu-PGE sulfide deposit, Gansu, China | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0361-0128&volume=102&spage=75&epage=94&date=2007&atitle=Field+Relationships+and+Geochemical+Constraints+on+the+Emplacement+of+the+Jinchuan+Intrusion+and+its+Ni-Cu-PGE+Sulfide+Deposit,+Gansu,+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 | 10.2113/gsecongeo.102.1.75 | en_HK |
dc.identifier.scopus | eid_2-s2.0-34447313367 | en_HK |
dc.identifier.hkuros | 144256 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-34447313367&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 102 | en_HK |
dc.identifier.issue | 1 | en_HK |
dc.identifier.spage | 75 | en_HK |
dc.identifier.epage | 94 | en_HK |
dc.identifier.isi | WOS:000246718600004 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Lehmann, J=7202265562 | en_HK |
dc.identifier.scopusauthorid | Arndt, N=7004860212 | en_HK |
dc.identifier.scopusauthorid | Windley, B=7006726637 | en_HK |
dc.identifier.scopusauthorid | Zhou, MF=7403506005 | en_HK |
dc.identifier.scopusauthorid | Wang, CY=34976092700 | en_HK |
dc.identifier.scopusauthorid | Harris, C=7403875337 | en_HK |
dc.identifier.issnl | 0361-0128 | - |