File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.chemgeo.2011.11.031
- Scopus: eid_2-s2.0-84155173544
- WOS: WOS:000304213800003
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Keketuohai mafic-ultramafic complex in the Chinese Altai, NW China: petrogenesis and geodynamic significance
Title | Keketuohai mafic-ultramafic complex in the Chinese Altai, NW China: petrogenesis and geodynamic significance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Authors | |||||||||||||
Keywords | Caob Chinese altai Mafic-ultramafic complex Petrogenesis Ridge subduction | ||||||||||||
Issue Date | 2012 | ||||||||||||
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | ||||||||||||
Citation | Chemical Geology, 2012, v. 294-295, p. 26-41 How to Cite? | ||||||||||||
Abstract | Devonian magmatism was very intensive in the tectonic evolutionary history of the Chinese Altai, a key part of the Central Asian Orogenic Belt (CAOB). The Devonian Keketuohai mafic-ultramafic complex in the Chinese Altai is a zoned intrusion consisting of dunite, olivine gabbro, hornblende gabbro and pyroxene diorite. The pyroxene diorite gives a zircon U-Pb age of 409±5Ma. Variations in mineral assemblage and chemical composition suggest that the petrogenesis of the Keketuohai Complex was chiefly governed by fractional crystallization from a common magma chamber. Low SiO 2, K 2O and Na 2O contents, negative covariations between P 2O 5, TiO 2 and Mg# value suggest insignificant crustal assimilation/contamination. Thus the positive ε Nd(t) values (0 to +2.7) and slight enrichments in light rare earth elements (e.g., La/Yb N=0.98-3.64) suggest that their parental magma was possibly produced by partial melting of the lithospheric mantle. Model calculation suggests that their parental magma was high-Mg (Mg#=66) tholeiitic basaltic melt. The Keketuohai intrusion was coeval with diverse magmatism, high temperature metamorphism and hydrothermal mineralization, which support a previously proposed model that ridge subduction most likely played an important role in the tectonic evolution of the Chinese Altai. © 2011 Elsevier B.V. | ||||||||||||
Persistent Identifier | http://hdl.handle.net/10722/151352 | ||||||||||||
ISSN | 2021 Impact Factor: 4.685 2020 SCImago Journal Rankings: 1.540 | ||||||||||||
ISI Accession Number ID |
Funding Information: This study was supported by the National Basic Research Program of China (2007CB411308), Hong Kong Research Grants Council (HKU704307P and HKU705311P), the National Natural Science Foundation of China (40721063, 40772130 and 40803009), the HKU CRCG Research Grants and Hong Kong-Germany Joint Research Scheme. We thank Ying Liu, Guangqian, Hu, Jinlong Ma, Xianglin Tu and Xirong Liang for laboratory assistance. Dr. Michail Buslov and an anonymous reviewer are thanked for their constructive reviews and comments. We sincerely appreciate Dr. Klaus Mezger for his helpful comments and editorial work. A HKU postgraduate studentship to Keda CAI is gratefully acknowledged. | ||||||||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cai, K | en_US |
dc.contributor.author | Sun, M | en_US |
dc.contributor.author | Yuan, C | en_US |
dc.contributor.author | Zhao, G | en_US |
dc.contributor.author | Xiao, W | en_US |
dc.contributor.author | Long, X | en_US |
dc.date.accessioned | 2012-06-26T06:21:01Z | - |
dc.date.available | 2012-06-26T06:21:01Z | - |
dc.date.issued | 2012 | en_US |
dc.identifier.citation | Chemical Geology, 2012, v. 294-295, p. 26-41 | en_US |
dc.identifier.issn | 0009-2541 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/151352 | - |
dc.description.abstract | Devonian magmatism was very intensive in the tectonic evolutionary history of the Chinese Altai, a key part of the Central Asian Orogenic Belt (CAOB). The Devonian Keketuohai mafic-ultramafic complex in the Chinese Altai is a zoned intrusion consisting of dunite, olivine gabbro, hornblende gabbro and pyroxene diorite. The pyroxene diorite gives a zircon U-Pb age of 409±5Ma. Variations in mineral assemblage and chemical composition suggest that the petrogenesis of the Keketuohai Complex was chiefly governed by fractional crystallization from a common magma chamber. Low SiO 2, K 2O and Na 2O contents, negative covariations between P 2O 5, TiO 2 and Mg# value suggest insignificant crustal assimilation/contamination. Thus the positive ε Nd(t) values (0 to +2.7) and slight enrichments in light rare earth elements (e.g., La/Yb N=0.98-3.64) suggest that their parental magma was possibly produced by partial melting of the lithospheric mantle. Model calculation suggests that their parental magma was high-Mg (Mg#=66) tholeiitic basaltic melt. The Keketuohai intrusion was coeval with diverse magmatism, high temperature metamorphism and hydrothermal mineralization, which support a previously proposed model that ridge subduction most likely played an important role in the tectonic evolution of the Chinese Altai. © 2011 Elsevier B.V. | en_US |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | en_US |
dc.relation.ispartof | Chemical Geology | en_US |
dc.subject | Caob | en_US |
dc.subject | Chinese altai | en_US |
dc.subject | Mafic-ultramafic complex | en_US |
dc.subject | Petrogenesis | en_US |
dc.subject | Ridge subduction | en_US |
dc.title | Keketuohai mafic-ultramafic complex in the Chinese Altai, NW China: petrogenesis and geodynamic significance | en_US |
dc.type | Article | en_US |
dc.identifier.email | Sun, M: minsun@hku.hk | en_US |
dc.identifier.email | Zhao, G: gzhao@hkucc.hku.hk | en_US |
dc.identifier.authority | Sun, M=rp00780 | en_US |
dc.identifier.authority | Zhao, G=rp00842 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.chemgeo.2011.11.031 | en_US |
dc.identifier.scopus | eid_2-s2.0-84155173544 | en_US |
dc.identifier.hkuros | 204298 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-84155173544&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 294-295 | en_US |
dc.identifier.spage | 26 | en_US |
dc.identifier.epage | 41 | en_US |
dc.identifier.eissn | 1872-6836 | - |
dc.identifier.isi | WOS:000304213800003 | - |
dc.publisher.place | Netherlands | en_US |
dc.identifier.scopusauthorid | Long, X=14012199100 | en_US |
dc.identifier.scopusauthorid | Xiao, W=7202456615 | en_US |
dc.identifier.scopusauthorid | Zhao, G=7403296321 | en_US |
dc.identifier.scopusauthorid | Yuan, C=35241599200 | en_US |
dc.identifier.scopusauthorid | Sun, M=25932315800 | en_US |
dc.identifier.scopusauthorid | Cai, K=14011943800 | en_US |
dc.identifier.citeulike | 10119645 | - |
dc.identifier.issnl | 0009-2541 | - |