Article: Geochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity
| Title | Geochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity |
|---|---|
| Authors | Chen, NS1 Wang, XY1 Zhang, HF1 Sun, M2 Li, XY1 Chen, Q1 |
| Keywords | Basemental attribute Granitoids Nd-Sr-Pb isotopic geochemistry NW China Qaidam and Oulongbuluke micro-blocks |
| Issue Date | 2007 |
| Citation | Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal Of China University Of Geosciences, 2007, v. 32 n. 1, p. 7-21 [How to Cite?] |
| Abstract | The formation of major and trace elemental and Sr-Nd-Pb isotopic geochemistries in Early Paleoproterozoic Mohe pluton and Early Triassic Cahanno pluton of the Oulongbuluke micro-block and Neoproterozoic Shaliuhe pluton, Late-Permian to Early-Triaasic Xiangride pluton and Late-Triassic Keri pluton of the Qaidam Block of northwestern China, were investigated. The Shaliuhe pluton and Keri muscovite pluton are characterized by S-type and paraaluminium granite, the others are by I-type granodiorite or granite. It is concluded from the comparsion of TDM and εNd that the magma source area of the Shaliuhe granite belongs to the II-type metabasement of the Oulongbuluke micro-block, and the magma of the rest of the plutons could not originate from the exposed supracurstal sequences. The TDMare clustered at -1.5-2.3 Ga and 0.9-1.3 Ga, with peak value of ∼1.2 Ga, ∼1.6 Ga and ∼2.05 Ga for both granitoids and meta-supracurstal rocks, ∼2.5 Ga and ∼2.8 Ga are solely distributed in the Oulongbuluke micro-block. The two micro-blocks have ratios of (206Pb/204Pb)t, (207Pb/204Pb)t and (206Pb/204Pb)t generally higher than 18, 15.5 and 38, respectively. These data suggest that the basements of the Oulongbuluke micro-blocks and the Qaidam micro-blocks are geochemically akin to that of the Yangtze Block, and that the Yangtze Block Domain can be extended northwestwards to the micro blocks on both sides of the Altyn-Tagh fault, and that the UHP-HP tectonic belt along the northern margin of the Qaidam micro-block is only a convergent boundary among the earlier broken up micro-blocks within the Yangtze Block. |
| ISSN | 1000-2383 2011 SCImago Journal Rankings: 0.033 |
| References | References in Scopus |
| dc.contributor.author | Chen, NS |
|---|---|
| dc.contributor.author | Wang, XY |
| dc.contributor.author | Zhang, HF |
| dc.contributor.author | Sun, M |
| dc.contributor.author | Li, XY |
| dc.contributor.author | Chen, Q |
| dc.date.accessioned | 2010-09-06T06:41:31Z |
| dc.date.available | 2010-09-06T06:41:31Z |
| dc.date.issued | 2007 |
| dc.description.abstract | The formation of major and trace elemental and Sr-Nd-Pb isotopic geochemistries in Early Paleoproterozoic Mohe pluton and Early Triassic Cahanno pluton of the Oulongbuluke micro-block and Neoproterozoic Shaliuhe pluton, Late-Permian to Early-Triaasic Xiangride pluton and Late-Triassic Keri pluton of the Qaidam Block of northwestern China, were investigated. The Shaliuhe pluton and Keri muscovite pluton are characterized by S-type and paraaluminium granite, the others are by I-type granodiorite or granite. It is concluded from the comparsion of TDM and εNd that the magma source area of the Shaliuhe granite belongs to the II-type metabasement of the Oulongbuluke micro-block, and the magma of the rest of the plutons could not originate from the exposed supracurstal sequences. The TDMare clustered at -1.5-2.3 Ga and 0.9-1.3 Ga, with peak value of ∼1.2 Ga, ∼1.6 Ga and ∼2.05 Ga for both granitoids and meta-supracurstal rocks, ∼2.5 Ga and ∼2.8 Ga are solely distributed in the Oulongbuluke micro-block. The two micro-blocks have ratios of (206Pb/204Pb)t, (207Pb/204Pb)t and (206Pb/204Pb)t generally higher than 18, 15.5 and 38, respectively. These data suggest that the basements of the Oulongbuluke micro-blocks and the Qaidam micro-blocks are geochemically akin to that of the Yangtze Block, and that the Yangtze Block Domain can be extended northwestwards to the micro blocks on both sides of the Altyn-Tagh fault, and that the UHP-HP tectonic belt along the northern margin of the Qaidam micro-block is only a convergent boundary among the earlier broken up micro-blocks within the Yangtze Block. |
| dc.description.nature | Link_to_subscribed_fulltext |
| dc.identifier.citation | Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal Of China University Of Geosciences, 2007, v. 32 n. 1, p. 7-21 [How to Cite?] |
| dc.identifier.epage | 21 |
| dc.identifier.hkuros | 127641 |
| dc.identifier.issn | 1000-2383 2011 SCImago Journal Rankings: 0.033 |
| dc.identifier.issue | 1 |
| dc.identifier.scopus | eid_2-s2.0-33847775305 |
| dc.identifier.spage | 7 |
| dc.identifier.uri | http://hdl.handle.net/10722/72410 |
| dc.identifier.volume | 32 |
| dc.language | eng |
| dc.relation.ispartof | Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences |
| dc.relation.references | References in Scopus |
| dc.subject | Basemental attribute |
| dc.subject | Granitoids |
| dc.subject | Nd-Sr-Pb isotopic geochemistry |
| dc.subject | NW China |
| dc.subject | Qaidam and Oulongbuluke micro-blocks |
| dc.title | Geochemistry and Nd-Sr-Pb isotopic compositions of granitoids from qaidam and oulongbuluke micro-blocks, NW China: Constraints on basement nature and tectonic affinity |
| dc.type | Article |
Author Affiliations
- China University of Geosciences
- The University of Hong Kong