globalchange  > 气候变化与战略
DOI: 10.1016/j.earscirev.2019.01.014
论文题名:
Detrital zircon provenance of Permo-Carboniferous glacial diamictites across Gondwana
作者: Craddock J.P.; Ojakangas R.W.; Malone D.H.; Konstantinou A.; Mory A.; Bauer W.; Thomas R.J.; Affinati S.C.; Pauls K.; Zimmerman U.; Botha G.; Rochas-Campos A.; Santos P.R.D.; Tohver E.; Riccomini C.; Martin J.; Redfern J.; Horstwood M.; Gehrels G.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 192
起始页码: 285
结束页码: 316
语种: 英语
英文关键词: Carboniferous ; detrital deposit ; diamictite ; Gondwana ; provenance ; SHRIMP dating ; uranium-lead dating ; zircon
英文摘要: Gondwana changed its high latitude location during the late Paleozoic (338–265 Ma), relative to the South Pole, and the style of glaciation evolved from localized alpine glaciers and ice fields to ~30 small ice sheets across the supercontinent. We report the analysis of heavy mineral populations (n = 2217) and the ages of detrital zircons (n = 2920 U-Pb LA-ICPMS results) from Gondwana diamictite deposits from eight landmasses: Africa (5 samples), Antarctica (5), Australia (8), the Ellsworth Mountains terrane (1, Antarctica), the Falkland Islands (2, diamictite plus U-Pb SHRIMP ages on granite clasts), India (1), Madagascar (1), Oman (3), the equatorial Lhasa terrane (2), the equatorial North Qiantang terrane (2) and South America (10). Heavy mineral separations (SEM-WDS analysis) identified one anomaly, pyrope garnets present only in Dwyka Group and Dwyka-equivalent samples suggesting an ultramafic Antarctic source. Statistical analysis of detrital zircon age distributions support the inference of local transport of sediment from many small ice centers with five examples of far-field ice transport (>1000 km; four with ice flow >2000 km), and three from ice fields located along coastal Antarctica. We propose that ice was distributed from five main ice-caps of different ages in southern Gondwana with ice flow away from central Gondwana. We also confirm that the Permo-Carboniferous detrital zircon populations of Euramerica (eolian and fluvial) and Gondwana (ash, detrital-glacial) are not mixed across the equator or seaway and ponder the possibility of a late Paleozoic snowball Earth. © 2019
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165787
Appears in Collections:气候变化与战略

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作者单位: Department of Geology, Macalester College, St. Paul, MN 55105, United States; Department of Geology, University of Minnesota-Duluth, Duluth, MN, United States; Department of Geography, Geology and the Environment, Illinois State University, Normal, IL 61790-4400, United States; ExxonMobil Exploration, Spring, TX 77389, United States; Resources Branch, Industry Regulation and Safety, Government of W. Australia, Mineral House, 100 Plain Street, East, Perth, WA 6004, United States; AGEO Department, German University of Technology in Oman, PO Box 1816, 130 Athaibah, Oman; Council for Geoscience, 3 Oos Street, Bellville, 7535, South Africa; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, United States; Department of Petroleum Engineering, University of Stavanger, Ullandhaug, Stavanger, 4036, Norway; Council for Geosciences, Geological Resources Division, 139 Jabu Ndlovu Street, Pietermaritzburg, 3200, South Africa; Instituto de Geociências, Universidade de São Paulo, São Paulo, Brazil; Instituto de Astronomia e Geofísica, Universidade de São Paulo, 1226 Rua do Matão, Cidade UniversitáriaSP 05508-090, Brazil; Institute of Energy and Environment, University of São Paulo, Av. Prof. Luciano Gualberto 1289, São Paulo, 05508-900, Brazil; Basin Studies Group, University of Manchester, School of Earth and Environment, Manchester, M13 9PL, United Kingdom; NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, NG12 5GG, United Kingdom; Department of Geosciences, University of Arizona, Tucson, AZ, United States

Recommended Citation:
Craddock J.P.,Ojakangas R.W.,Malone D.H.,et al. Detrital zircon provenance of Permo-Carboniferous glacial diamictites across Gondwana[J]. Earth Science Reviews,2019-01-01,192
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