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New constraints on the ages of Neoproterozoic glaciations in south China

Zhou Chuanming, Robert Tucker, Shuhai Xiao, Zhanxiong Peng, Yuan Xunlai and Chen Zhe
New constraints on the ages of Neoproterozoic glaciations in south China
Geology (Boulder) (May 2004) 32 (5): 437-440

Abstract

The most complete Neoproterozoic successions in south China contain three diamictite intervals in the Changan, Tiesiao, and Nantuo Formations. The youngest and most widespread Nantuo glacial deposit overlies the Datangpo Formation and underlies the fossil- rich Doushantuo Formation. Previous authors have correlated the Nantuo diamictite to either Sturtian or Marinoan glacial deposits elsewhere. Here we report sedimentary and delta (super 13) C chemostratigraphic data of the Doushantuo cap dolostone, which overlies the Nantuo Formation. Facies-dependent variation in delta (super 13) C is interpreted as evidence for spatial heterogeneity in delta (super 13) C and/or temporal diachroneity in the initiation of cap carbonate sedimentation. Sedimentary and chemostratigraphic data are indicative of a Marinoan age for the Nantuo glaciation. This inference is supported by a new U-Pb zircon age of 663+ or -4 Ma from a tuffaceous bed in the Datangpo Formation. The new date and other isotopic ages from south China constrain the age of the Changan and Tiesiao glaciation(s) as between 761+ or -8 Ma and 663+ or -4 Ma, and the Nantuo glaciation as between 663+ or -4 Ma and 599+ or -4 Ma.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 32
Serial Issue: 5
Title: New constraints on the ages of Neoproterozoic glaciations in south China
Affiliation: Nanjing Institute of Geology and Paleontology, Nanjing, China
Pages: 437-440
Published: 200405
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 26
Accession Number: 2004-047844
Categories: StratigraphyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2004072
Illustration Description: illus. incl. strat. col., 1 table, sketch map
N24°40'00" - N30°10'00", E109°00'00" - E114°15'00"
N29°00'00" - N33°19'60", E108°30'00" - E116°00'00"
N24°40'00" - N29°19'60", E103°00'00" - E109°30'00"
N21°30'00" - N26°19'60", E104°30'00" - E112°00'00"
N29°30'00" - N34°34'60", E115°00'00" - E119°25'00"
Secondary Affiliation: Washington University, USA, United StatesVirginia Polytechnic Institute and State University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200413
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