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Article: SHRIMP zircon U-Pb age constraints on Neoproterozoic Quruqtagh diamictites in NW China

TitleSHRIMP zircon U-Pb age constraints on Neoproterozoic Quruqtagh diamictites in NW China
Authors
KeywordsNeoproterozoic Glaciation
Northwest China
Quruqtagh Group
Shrimp Geochronology
Tarim
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2009, v. 168 n. 3-4, p. 247-258 How to Cite?
AbstractThe Neoproterozoic Quruqtagh Group in the Tarim Block, NW China, contains multiple diamictites in the Bayisi, Altungol, Tereeken, and Hankalchough formations. These diamictites may represent three or possibly four discrete glaciations, although evidence for a glacial origin of the Bayisi and Altungol diamictite is ambiguous. To constrain their age and duration, we dated three volcanic beds (V1, V2, and V3) in the Quruqtagh Group using the SHRIMP (sensitive high-resolution ion microprobe) zircon U-Pb method. Volcanic bed V1 near the base of the Bayisi diamictite yields a 740 ± 7 Ma age, volcanic bed V2 near the top of the Bayisi Formation gives a 725 ± 10 Ma age, and volcanic bed V3 between the Tereeken and Hankalchough diamictites yields a 615 ± 6 Ma age. V1 and V2 have overlapping ages, and together these dates suggest that the Bayisi diamictite was deposited at around 730 Ma. The Tereeken and Altungol diamictites were deposited between 725 ± 10 Ma and 615 ± 6 Ma, and the Hankalchough diamictite between 615 ± 6 Ma and ∼542 Ma (i.e., the Neoproterozoic-Cambrian transition). These dates and previously published chemostratigraphic data are consistent with (but doe not require) the correlation of the Tereeken and Hankalchough diamictites with the 635 Ma Nantuo and 582 Ma Gaskiers glaciations, respectively. However, the new dates are inconsistent with a single and globally synchronous Sturtian glaciation that occurred in the pre-Nantuo Neoproterozoic Era. Instead, currently available data necessitate that either multiple glaciations occurred, or a globally diachronous glacial event developed during a protracted period between ∼750 Ma and ∼650 Ma. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92267
ISSN
2015 Impact Factor: 4.037
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China40572133
40032010
CSC of China2003811069
US National Science FoundationEAR-0545135
Australian Research CouncilDP0770228
NASANNG05GP21 G
Funding Information:

We are grateful to Y. Li, H. Bao, and H. Wang for field assistance. We would like to thank S. Bowring, D. Condon, G. Halverson, X. Dong, G. Shields, and Y.F. Zhu for useful discussion and comments. We benefited from very constructive reviews by Dan Condon and Bill Davis. This work was supported by the National Natural Science Foundation of China (40572133, 40032010) and CSC of China (2003811069), US National Science Foundation (EAR-0545135), Australian Research Council (DP0770228), and NASA Exobiology Program (NNG05GP21 G). This is TIGeR publication No. 154.

References

 

DC FieldValueLanguage
dc.contributor.authorXu, Ben_HK
dc.contributor.authorXiao, Sen_HK
dc.contributor.authorZou, Hen_HK
dc.contributor.authorChen, Yen_HK
dc.contributor.authorLi, Z-Xen_HK
dc.contributor.authorSong, Ben_HK
dc.contributor.authorLiu, Den_HK
dc.contributor.authorZhou, Cen_HK
dc.contributor.authorYuan, Xen_HK
dc.date.accessioned2010-09-17T10:41:00Z-
dc.date.available2010-09-17T10:41:00Z-
dc.date.issued2009en_HK
dc.identifier.citationPrecambrian Research, 2009, v. 168 n. 3-4, p. 247-258en_HK
dc.identifier.issn0301-9268en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92267-
dc.description.abstractThe Neoproterozoic Quruqtagh Group in the Tarim Block, NW China, contains multiple diamictites in the Bayisi, Altungol, Tereeken, and Hankalchough formations. These diamictites may represent three or possibly four discrete glaciations, although evidence for a glacial origin of the Bayisi and Altungol diamictite is ambiguous. To constrain their age and duration, we dated three volcanic beds (V1, V2, and V3) in the Quruqtagh Group using the SHRIMP (sensitive high-resolution ion microprobe) zircon U-Pb method. Volcanic bed V1 near the base of the Bayisi diamictite yields a 740 ± 7 Ma age, volcanic bed V2 near the top of the Bayisi Formation gives a 725 ± 10 Ma age, and volcanic bed V3 between the Tereeken and Hankalchough diamictites yields a 615 ± 6 Ma age. V1 and V2 have overlapping ages, and together these dates suggest that the Bayisi diamictite was deposited at around 730 Ma. The Tereeken and Altungol diamictites were deposited between 725 ± 10 Ma and 615 ± 6 Ma, and the Hankalchough diamictite between 615 ± 6 Ma and ∼542 Ma (i.e., the Neoproterozoic-Cambrian transition). These dates and previously published chemostratigraphic data are consistent with (but doe not require) the correlation of the Tereeken and Hankalchough diamictites with the 635 Ma Nantuo and 582 Ma Gaskiers glaciations, respectively. However, the new dates are inconsistent with a single and globally synchronous Sturtian glaciation that occurred in the pre-Nantuo Neoproterozoic Era. Instead, currently available data necessitate that either multiple glaciations occurred, or a globally diachronous glacial event developed during a protracted period between ∼750 Ma and ∼650 Ma. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamresen_HK
dc.relation.ispartofPrecambrian Researchen_HK
dc.subjectNeoproterozoic Glaciationen_HK
dc.subjectNorthwest Chinaen_HK
dc.subjectQuruqtagh Groupen_HK
dc.subjectShrimp Geochronologyen_HK
dc.subjectTarimen_HK
dc.titleSHRIMP zircon U-Pb age constraints on Neoproterozoic Quruqtagh diamictites in NW Chinaen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.precamres.2008.10.008en_HK
dc.identifier.scopuseid_2-s2.0-58549093349en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58549093349&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume168en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage247en_HK
dc.identifier.epage258en_HK
dc.identifier.isiWOS:000263586000008-

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