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Article: A mineralogical analysis of karst sediments and its implications to the middle-late Pleistocene climatic changes on the Tibetan Plateau

TitleA mineralogical analysis of karst sediments and its implications to the middle-late Pleistocene climatic changes on the Tibetan Plateau
Authors
KeywordsKarst Sediments
Mineralogy
Palaeoenvironment
Pleistocene
Tibetan Plateau
Issue Date1998
PublisherSpringer (India) Private Ltd.
Citation
Journal of the Geological Society of India, 1998, v. 52 n. 3, p. 351-359 How to Cite?
AbstractThe minerals in various categories of Tibetan karst sediments were divided into three groups: carbonate, iron and silicate. The carbonate minerals, including calcite, aragonite and dolomite, consist mainly of speleothem, tufa and sinter. Most of the speleothems indicates wetter and warmer periods in early and middle Pleistocene, the youngest being 194,000 years old. The second formation of carbonate mineral, tufa, implies an arid period starting 91,000 years BP. The iron minerals, goethite and hematite, are often mixed up with cave alluvial sediments that are interbedded with flows tones, and the depression sediments. They indicate strong oxidizing environments during their deposition, which is absent at present. The clay minerals, specially kaolinite, were contained in cave alluvial, flowstone and the depression sediments as well. Combined with stratigraphie study and U-series dating, the mineral analysis shows that warmer and wetter climates, which were suitable for speleothem development, probably disappeared 200 ka ago, and drier and colder climates dominated this plateau since then. © GEOL. SOC.
Persistent Identifierhttp://hdl.handle.net/10722/157867
ISSN
2015 Impact Factor: 0.547
2015 SCImago Journal Rankings: 0.388
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, DDen_US
dc.date.accessioned2012-08-08T08:56:03Z-
dc.date.available2012-08-08T08:56:03Z-
dc.date.issued1998en_US
dc.identifier.citationJournal of the Geological Society of India, 1998, v. 52 n. 3, p. 351-359en_US
dc.identifier.issn0016-7622en_US
dc.identifier.urihttp://hdl.handle.net/10722/157867-
dc.description.abstractThe minerals in various categories of Tibetan karst sediments were divided into three groups: carbonate, iron and silicate. The carbonate minerals, including calcite, aragonite and dolomite, consist mainly of speleothem, tufa and sinter. Most of the speleothems indicates wetter and warmer periods in early and middle Pleistocene, the youngest being 194,000 years old. The second formation of carbonate mineral, tufa, implies an arid period starting 91,000 years BP. The iron minerals, goethite and hematite, are often mixed up with cave alluvial sediments that are interbedded with flows tones, and the depression sediments. They indicate strong oxidizing environments during their deposition, which is absent at present. The clay minerals, specially kaolinite, were contained in cave alluvial, flowstone and the depression sediments as well. Combined with stratigraphie study and U-series dating, the mineral analysis shows that warmer and wetter climates, which were suitable for speleothem development, probably disappeared 200 ka ago, and drier and colder climates dominated this plateau since then. © GEOL. SOC.en_US
dc.languageengen_US
dc.publisherSpringer (India) Private Ltd.-
dc.relation.ispartofJournal of the Geological Society of Indiaen_US
dc.subjectKarst Sedimentsen_US
dc.subjectMineralogyen_US
dc.subjectPalaeoenvironmenten_US
dc.subjectPleistoceneen_US
dc.subjectTibetan Plateauen_US
dc.titleA mineralogical analysis of karst sediments and its implications to the middle-late Pleistocene climatic changes on the Tibetan Plateauen_US
dc.typeArticleen_US
dc.identifier.emailZhang, DD: zhangd@hkucc.hku.hken_US
dc.identifier.authorityZhang, DD=rp00649en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.scopuseid_2-s2.0-2142663482en_US
dc.identifier.hkuros44413-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-2142663482&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume52en_US
dc.identifier.issue3en_US
dc.identifier.spage351en_US
dc.identifier.epage359en_US
dc.publisher.placeIndiaen_US
dc.identifier.scopusauthoridZhang, DD=9732911600en_US

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