期刊
GEOLOGY
卷 48, 期 8, 页码 755-760出版社
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G47466.1
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- Australian Research Council [FL160100028]
- Australian Research Council [FL160100028] Funding Source: Australian Research Council
The utility of speleothems as environmental and geological archives has greatly expanded with recent advances in geochronology. Here we reevaluate their ability to constrain late Ce-nozoic uplift in karst terranes. Using combined U-Th and U-Pb speleothem chronologies for the Buchan karst along the passive margin of southeastern Australia, we calculate a maximum uplift rate of 76 +/- 7 m m.y.(-1) maintained over the past 3.5 m.y. The timing and extent of this process is consistent with independent constraints on Neogene uplift in Australia, possibly in response to increased plate-boundary strain with New Zealand. Speleothem chronologies provide highly precise age control on individual events and the potential for near-continuous records across long periods of geological time, complementing and expanding upon existing uplift proxies.
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