File Download
  Links for fulltext
     (May Require Subscription)
  • Find via Find It@HKUL
Supplementary

Article: Constraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic pluton

TitleConstraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic pluton
莫河花岗岩的锆石U-Pb和Lu-Hf同位素研究:柴北欧龙布鲁克微陆块始古元古代岩浆作用年龄和地壳演化约束
Authors
Keywords锆石 (Zircon)
U-Pb和Hf同位素 (U-Pb and Hf isotopes)
花岗岩 (Granite)
前寒武纪地壳演化 (Precambrian crustal evolution)
欧龙布鲁克微陆块 (Oulongbuluke micro-continent)
柴北 (North Qaidam)
Issue Date2007
Citation
Acta Petrologica Sinica, 2007, v. 23 n. 2, p. 513-522 How to Cite?
岩石学报, 2007, 第23卷 第2期, pp. 513-522 How to Cite?
AbstractThe Olongbuluke micro-continent is composed of a two-fold basement with cover strata. The lower basement is the medium-to high-grade Delingha complex (DC) and the Dakendaban Group, the upper is the low-grade Wandonggou Group. Zircon LA-ICP-MS dating gives U-Pb isotope of 27 zircon grains from the Mohe granite of the DC, of which 26 zircon grains suffered various degree of Pb loss and defined a Concordia with a upper intercept age of 2470 +19/-18Ma. Hf isotope of 25 zircon grains was measured using LA-MC-ICP-MS technique, of which 23 grains crystallized from Mohe granite show Hf(2470Ma) = 0.28129-0.28140 (weighted average of 0.28134±0.00003). εHf = 2.94-6.95(weighted average of 4.58 + 0.54/-0.76), resident time for the felsic crustal reservoir TcDM=2.54-2.75 Ga with weighted average of 2.66 + 0.04/-0.02Ga. These data indicate that the Mohe granite pluton was derived from partial melting of the mantle, and the intrusion of the Mohe granite pluton implied a crustal accretion event occurred in Olongbuluke micro-continent at ca. 2.5 Ga.
欧龙布鲁克微陆块具典型的基底与盖层二元结构,基底自下而上由德令哈杂岩、达肯大坂岩群和万洞沟群三个岩石-构造单元组成。应用LA-ICP-MS测定了德令哈杂岩中的莫河花岗岩体的27个颗锆石的U-Pb同位索成分,其中26颗锆石发生不同程度的放射成因铅同位素丢失,其不一致线上交点年龄为2470+19/-18Ma。应用LA-MC-ICP-MS测定了25颗锆石的Hf同位索成分,其中岩浆结晶成因的23颗锆石的Hf(2470Ma)=0.28129-0.28140,平均值0.28134±0.00003;εHf值的变化范围2.94-6.95,加权平均值4.58+0.54/-0.76,长英质地壳存留年龄TcDM=2.54-2.75Ga,加权平均值2.66+0.04/-0.02Ga。以上数据将该花岗岩的形成年龄约束在2470Ma,其岩浆来源于地幔物质的部分熔融,指示欧龙布鲁克微陆块在-2.5Ga的地壳增生事件。
Persistent Identifierhttp://hdl.handle.net/10722/72900
ISSN
2015 Impact Factor: 1.234
2015 SCImago Journal Rankings: 0.892

 

DC FieldValueLanguage
dc.contributor.authorLi, Xen_HK
dc.contributor.authorChen, Nen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorXu, Pen_HK
dc.contributor.authorWang, Qen_HK
dc.contributor.authorWang, Xen_HK
dc.date.accessioned2010-09-06T06:46:10Z-
dc.date.available2010-09-06T06:46:10Z-
dc.date.issued2007en_HK
dc.identifier.citationActa Petrologica Sinica, 2007, v. 23 n. 2, p. 513-522en_HK
dc.identifier.citation岩石学报, 2007, 第23卷 第2期, pp. 513-522zh_HK
dc.identifier.issn1000-0569-
dc.identifier.urihttp://hdl.handle.net/10722/72900-
dc.description.abstractThe Olongbuluke micro-continent is composed of a two-fold basement with cover strata. The lower basement is the medium-to high-grade Delingha complex (DC) and the Dakendaban Group, the upper is the low-grade Wandonggou Group. Zircon LA-ICP-MS dating gives U-Pb isotope of 27 zircon grains from the Mohe granite of the DC, of which 26 zircon grains suffered various degree of Pb loss and defined a Concordia with a upper intercept age of 2470 +19/-18Ma. Hf isotope of 25 zircon grains was measured using LA-MC-ICP-MS technique, of which 23 grains crystallized from Mohe granite show Hf(2470Ma) = 0.28129-0.28140 (weighted average of 0.28134±0.00003). εHf = 2.94-6.95(weighted average of 4.58 + 0.54/-0.76), resident time for the felsic crustal reservoir TcDM=2.54-2.75 Ga with weighted average of 2.66 + 0.04/-0.02Ga. These data indicate that the Mohe granite pluton was derived from partial melting of the mantle, and the intrusion of the Mohe granite pluton implied a crustal accretion event occurred in Olongbuluke micro-continent at ca. 2.5 Ga.-
dc.description.abstract欧龙布鲁克微陆块具典型的基底与盖层二元结构,基底自下而上由德令哈杂岩、达肯大坂岩群和万洞沟群三个岩石-构造单元组成。应用LA-ICP-MS测定了德令哈杂岩中的莫河花岗岩体的27个颗锆石的U-Pb同位索成分,其中26颗锆石发生不同程度的放射成因铅同位素丢失,其不一致线上交点年龄为2470+19/-18Ma。应用LA-MC-ICP-MS测定了25颗锆石的Hf同位索成分,其中岩浆结晶成因的23颗锆石的Hf(2470Ma)=0.28129-0.28140,平均值0.28134±0.00003;εHf值的变化范围2.94-6.95,加权平均值4.58+0.54/-0.76,长英质地壳存留年龄TcDM=2.54-2.75Ga,加权平均值2.66+0.04/-0.02Ga。以上数据将该花岗岩的形成年龄约束在2470Ma,其岩浆来源于地幔物质的部分熔融,指示欧龙布鲁克微陆块在-2.5Ga的地壳增生事件。zh_HK
dc.languagechien_HK
dc.relation.ispartofActa Petrologica Sinicaen_HK
dc.relation.ispartof岩石学报zh_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject锆石 (Zircon)zh_HK
dc.subjectU-Pb和Hf同位素 (U-Pb and Hf isotopes)zh_HK
dc.subject花岗岩 (Granite)zh_HK
dc.subject前寒武纪地壳演化 (Precambrian crustal evolution)zh_HK
dc.subject欧龙布鲁克微陆块 (Oulongbuluke micro-continent)zh_HK
dc.subject柴北 (North Qaidam)zh_HK
dc.titleConstraints on timing of the early-paleoproterozoic magmatism and crustal evolution of the Oulongbuluke microcontinent: U-Pb and Lu-Hf isotope systematics of zircons from Mohe granitic plutonen_HK
dc.title莫河花岗岩的锆石U-Pb和Lu-Hf同位素研究:柴北欧龙布鲁克微陆块始古元古代岩浆作用年龄和地壳演化约束zh_HK
dc.typeArticleen_HK
dc.identifier.emailChen, N: chennengsong@163.comen_HK
dc.identifier.emailXia, X: xpxia@hkusua.hku.hken_HK
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros128534en_HK
dc.identifier.hkuros144184-
dc.identifier.volume23-
dc.identifier.issue2-
dc.identifier.spage513-
dc.identifier.epage522-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats