File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.jseaes.2004.01.017
- Scopus: eid_2-s2.0-14944356730
- WOS: WOS:000228247800008
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Sm-Nd and SHRIMP U-Pb zircon geochronology of high-pressure granulites in the Sanggan area, North China Craton: Timing of Paleoproterozoic continental collision
Title | Sm-Nd and SHRIMP U-Pb zircon geochronology of high-pressure granulites in the Sanggan area, North China Craton: Timing of Paleoproterozoic continental collision |
---|---|
Authors | |
Keywords | High-Pressure Granulite North China Craton Paleoproterozoic Shrimp U-Pb Zircon Geochronology Sm-Nd Ages |
Issue Date | 2005 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes |
Citation | Journal Of Asian Earth Sciences, 2005, v. 24 n. 5 SPEC. ISS., p. 629-642 How to Cite? |
Abstract | High-pressure (HP) mafic granulites are widely distributed as sheet-like and lenticular bodies within highly deformed tonalitic gneisses in the Sanggan area, North China Craton. They have clockwise isothermal decompression and isobaric cooling P-T paths implying continental collision tectonics. Whole-rock analyses of 15 samples define a Sm-Nd isochron yielding an age of 2547 ± 87 Ma with ε Nd(t)=2.7. Corresponding Nd depleted mantle model ages show a similar range and are interpreted as the age of the magmatic protolith to the high-pressure granulites. A combined Sm-Nd mineral+whole-rock isochron from one of these samples yields an age of 1813 ± 23 Ma, taken to represent the metamorphic age at an early stage on the cooling path. SHRIMP U-Pb zircon analyses of three HP mafic granulite samples give uniform weighted mean 207Pb/ 206Pb ages of 1817 ± 12, 1817 ± 12 and 1819 ± 16 Ma. These ages are interpreted to date metamorphism of the HP granulites and, with the Sm-Nd mineral + whole-rock result, strongly suggest that the time of continental collision was at ca.1.82 Ga. An additional sample records two age populations; one at 1803 ± 9 Ma and an older one at 1872 ± 16 Ma. The latter may indicate the timing of either an earlier metamorphic event or possibly the earliest stage of a single prolonged metamorphic episode that peaked at ∼1.82 Ga. These results confirm the Paleoproterozoic age for assembly of the North China Craton. © 2004 Elsevier Ltd. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/151140 |
ISSN | 2023 Impact Factor: 2.7 2023 SCImago Journal Rankings: 0.964 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Guo, JH | en_US |
dc.contributor.author | Sun, M | en_US |
dc.contributor.author | Chen, FK | en_US |
dc.contributor.author | Zhai, MG | en_US |
dc.date.accessioned | 2012-06-26T06:17:35Z | - |
dc.date.available | 2012-06-26T06:17:35Z | - |
dc.date.issued | 2005 | en_US |
dc.identifier.citation | Journal Of Asian Earth Sciences, 2005, v. 24 n. 5 SPEC. ISS., p. 629-642 | en_US |
dc.identifier.issn | 1367-9120 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/151140 | - |
dc.description.abstract | High-pressure (HP) mafic granulites are widely distributed as sheet-like and lenticular bodies within highly deformed tonalitic gneisses in the Sanggan area, North China Craton. They have clockwise isothermal decompression and isobaric cooling P-T paths implying continental collision tectonics. Whole-rock analyses of 15 samples define a Sm-Nd isochron yielding an age of 2547 ± 87 Ma with ε Nd(t)=2.7. Corresponding Nd depleted mantle model ages show a similar range and are interpreted as the age of the magmatic protolith to the high-pressure granulites. A combined Sm-Nd mineral+whole-rock isochron from one of these samples yields an age of 1813 ± 23 Ma, taken to represent the metamorphic age at an early stage on the cooling path. SHRIMP U-Pb zircon analyses of three HP mafic granulite samples give uniform weighted mean 207Pb/ 206Pb ages of 1817 ± 12, 1817 ± 12 and 1819 ± 16 Ma. These ages are interpreted to date metamorphism of the HP granulites and, with the Sm-Nd mineral + whole-rock result, strongly suggest that the time of continental collision was at ca.1.82 Ga. An additional sample records two age populations; one at 1803 ± 9 Ma and an older one at 1872 ± 16 Ma. The latter may indicate the timing of either an earlier metamorphic event or possibly the earliest stage of a single prolonged metamorphic episode that peaked at ∼1.82 Ga. These results confirm the Paleoproterozoic age for assembly of the North China Craton. © 2004 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 | High-Pressure Granulite | en_US |
dc.subject | North China Craton | en_US |
dc.subject | Paleoproterozoic | en_US |
dc.subject | Shrimp U-Pb Zircon Geochronology | en_US |
dc.subject | Sm-Nd Ages | en_US |
dc.title | Sm-Nd and SHRIMP U-Pb zircon geochronology of high-pressure granulites in the Sanggan area, North China Craton: Timing of Paleoproterozoic continental collision | en_US |
dc.type | Article | en_US |
dc.identifier.email | Sun, M:minsun@hku.hk | en_US |
dc.identifier.authority | Sun, M=rp00780 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.jseaes.2004.01.017 | en_US |
dc.identifier.scopus | eid_2-s2.0-14944356730 | en_US |
dc.identifier.hkuros | 127650 | - |
dc.identifier.hkuros | 108591 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-14944356730&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 24 | en_US |
dc.identifier.issue | 5 SPEC. ISS. | en_US |
dc.identifier.spage | 629 | en_US |
dc.identifier.epage | 642 | en_US |
dc.identifier.isi | WOS:000228247800008 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Guo, JH=36623632200 | en_US |
dc.identifier.scopusauthorid | Sun, M=25932315800 | en_US |
dc.identifier.scopusauthorid | Chen, FK=7404907137 | en_US |
dc.identifier.scopusauthorid | Zhai, MG=35910309500 | en_US |
dc.identifier.issnl | 1367-9120 | - |