File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Timing of magmatism of the gneissic-granite plutons along north Qaidam margin and implications for Precambrian crustal accretions: Zircon U-Pb dating and Hf isotope evidences

TitleTiming of magmatism of the gneissic-granite plutons along north Qaidam margin and implications for Precambrian crustal accretions: Zircon U-Pb dating and Hf isotope evidences
Authors
KeywordsCrustal accretion
Gneissic granitoids
Hf isotope
North Qaidam margin
Zircon U-Pb dating
Issue Date2007
PublisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspx
Citation
Acta Petrologica Sinica, 2007, v. 23 n. 2, p. 501-512 How to Cite?
AbstractLaser abration microprobe-inductively coupled plasma mass spectrometer (LA-ICP-MS) technique was applied for zircon dating of the Quanjihe granite in the east of Xitieshan and Shaliuhe granite in north Dulan County in the Qaidam margin; Laser abration microprobe-multi-collector-inductively coupled plasma mass spectrometer (MC-ICP-MS) technique was used to analysis Hf isotope compositions of zircon from the Shaliuhe granite. For the Quanjihe granite, a Concordia age of 910 + 15/ - 17Ma was yielded for the magmatic zircons, 207Pb/ 206Pb age of 1351 Ma for the detrital zircon and 206Pb/ 238U age of ca. 520Ma ( 232Th/ 238U = 0.04) for the metamorphic zircon resulted from a metamorphic event prior to the HP UHP metamorphism. The zircon from the Shaliuhe granite often contains inherited detrital cores. Of the 21 measurements on 21 zircon grains, 10 measurements of magmatic zircon yielded Robust (Median) 206Pb/ 238 U age of 920 + 31/ - 17Ma, and the detrital zircon yielded 207Pb/ 206Pb age older than 1250Ma. Of the 30 measurements on 30 grains of zircon from the Shaliuhe granite, 27 measurements of magmatic zircon yielded 176Hf/ 177Hf = 0.282081 - 0.282222 with Robust (Median) average of 0.282178 + 0.000009/ -0.000015, Hf 1 = 0.28206 ∼ 0.28220 with average of 0.28215 +/ -0.00003, ε Hf = + 0.21 ∼ -4.70 with Robust (Median) average of -1.53 + 0.41/ -0.52, zircon Hf isotope crustal model age T DM C = 1.59 - 1.75Ma, Robust (Median) average of 1.68 + 0.03/ - 0.02Ma. The other two of the rest detrital zircons have 176Hf/ 177Hf ratio of 0.281892 and 0.281792, Hf 1 = 0.28186 ∼ 0.28178, ε Hf = -11.83 ∼ -14.82, T DM C = 2.18 ∼ 2.33Ga. It suggested that the magmatism for the gneissic granites on the North Qaidam margin should have a duration time from ∼950Ma to ∼910Ma, with peak age of ∼920Ma. The magma of Shaliuhe granite and others with the same S-type peraluminous characteristics was generated from highly recycled upper crustal material-derived basemental suppracrustal rocks beneath the corroded Shaliuhe Group. The age of these materials should be constrained to be 1.4Ga ∼ 1.7Ga and had recorded two crustal accretion events at ∼1.7Ga and ∼2.3Ga for their provenances.
Persistent Identifierhttp://hdl.handle.net/10722/72428
ISSN
2015 Impact Factor: 1.234
2015 SCImago Journal Rankings: 0.892
References

 

DC FieldValueLanguage
dc.contributor.authorChen, NSen_HK
dc.contributor.authorXia, XPen_HK
dc.contributor.authorLi, XYen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorXu, Pen_HK
dc.contributor.authorLiu, XMen_HK
dc.contributor.authorWang, XYen_HK
dc.contributor.authorWang, QYen_HK
dc.date.accessioned2010-09-06T06:41:43Z-
dc.date.available2010-09-06T06:41:43Z-
dc.date.issued2007en_HK
dc.identifier.citationActa Petrologica Sinica, 2007, v. 23 n. 2, p. 501-512en_HK
dc.identifier.issn1000-0569en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72428-
dc.description.abstractLaser abration microprobe-inductively coupled plasma mass spectrometer (LA-ICP-MS) technique was applied for zircon dating of the Quanjihe granite in the east of Xitieshan and Shaliuhe granite in north Dulan County in the Qaidam margin; Laser abration microprobe-multi-collector-inductively coupled plasma mass spectrometer (MC-ICP-MS) technique was used to analysis Hf isotope compositions of zircon from the Shaliuhe granite. For the Quanjihe granite, a Concordia age of 910 + 15/ - 17Ma was yielded for the magmatic zircons, 207Pb/ 206Pb age of 1351 Ma for the detrital zircon and 206Pb/ 238U age of ca. 520Ma ( 232Th/ 238U = 0.04) for the metamorphic zircon resulted from a metamorphic event prior to the HP UHP metamorphism. The zircon from the Shaliuhe granite often contains inherited detrital cores. Of the 21 measurements on 21 zircon grains, 10 measurements of magmatic zircon yielded Robust (Median) 206Pb/ 238 U age of 920 + 31/ - 17Ma, and the detrital zircon yielded 207Pb/ 206Pb age older than 1250Ma. Of the 30 measurements on 30 grains of zircon from the Shaliuhe granite, 27 measurements of magmatic zircon yielded 176Hf/ 177Hf = 0.282081 - 0.282222 with Robust (Median) average of 0.282178 + 0.000009/ -0.000015, Hf 1 = 0.28206 ∼ 0.28220 with average of 0.28215 +/ -0.00003, ε Hf = + 0.21 ∼ -4.70 with Robust (Median) average of -1.53 + 0.41/ -0.52, zircon Hf isotope crustal model age T DM C = 1.59 - 1.75Ma, Robust (Median) average of 1.68 + 0.03/ - 0.02Ma. The other two of the rest detrital zircons have 176Hf/ 177Hf ratio of 0.281892 and 0.281792, Hf 1 = 0.28186 ∼ 0.28178, ε Hf = -11.83 ∼ -14.82, T DM C = 2.18 ∼ 2.33Ga. It suggested that the magmatism for the gneissic granites on the North Qaidam margin should have a duration time from ∼950Ma to ∼910Ma, with peak age of ∼920Ma. The magma of Shaliuhe granite and others with the same S-type peraluminous characteristics was generated from highly recycled upper crustal material-derived basemental suppracrustal rocks beneath the corroded Shaliuhe Group. The age of these materials should be constrained to be 1.4Ga ∼ 1.7Ga and had recorded two crustal accretion events at ∼1.7Ga and ∼2.3Ga for their provenances.en_HK
dc.languagechien_HK
dc.languageeng-
dc.publisherChinese Academy of Sciences, Institute of Geology and Geophysics. The Journal's web site is located at http://www.ysxb.ac.cn/ysxb/ch/index.aspxen_HK
dc.relation.ispartofActa Petrologica Sinicaen_HK
dc.subjectCrustal accretionen_HK
dc.subjectGneissic granitoidsen_HK
dc.subjectHf isotopeen_HK
dc.subjectNorth Qaidam marginen_HK
dc.subjectZircon U-Pb datingen_HK
dc.titleTiming of magmatism of the gneissic-granite plutons along north Qaidam margin and implications for Precambrian crustal accretions: Zircon U-Pb dating and Hf isotope evidencesen_HK
dc.typeArticleen_HK
dc.identifier.emailXia, XP: xpxia@hotmail.comen_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.authorityXia, XP=rp00815en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-34250372863en_HK
dc.identifier.hkuros128533en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34250372863&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume23en_HK
dc.identifier.issue2en_HK
dc.identifier.spage501en_HK
dc.identifier.epage512en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridChen, NS=12796732200en_HK
dc.identifier.scopusauthoridXia, XP=35241486400en_HK
dc.identifier.scopusauthoridLi, XY=35228322300en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridXu, P=49161291100en_HK
dc.identifier.scopusauthoridLiu, XM=7409282199en_HK
dc.identifier.scopusauthoridWang, XY=7501858663en_HK
dc.identifier.scopusauthoridWang, QY=14046248000en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats