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Radiometric dating of Tasmanian speleothems—evidence of cave evolution and climatic change

 

作者: A. Goede,   R. S. Harmon,  

 

期刊: Journal of the Geological Society of Australia  （Taylor Available online 1983）
卷期: Volume 30, issue 1-2  

页码: 89-100

 

ISSN:0016-7614

 

年代: 1983

 

DOI:10.1080/00167618308729239

 

出版商: Taylor & Francis Group

 

关键词: radiometric dating;speleothems;cave evolution;weathering rinds;stalagmite growth rates;climatic change

 

数据来源: Taylor

 

摘要:

230Th/234U dates on Tasmanian speleothems enable preliminary estimates to be made of ages and rates of evolution of Tasmanian karst caves. Occurrence of speleothem deposition has varied markedly in time, the highest abundance being associated with marine isotope stages 1 and 5. Rates of growth of from 21 to 79 mm/ka have been determined for four equilibrium diameter stalagmites, some of which are known or expected to provide suitable material for isotopic analysis.

 

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