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Evidence for early Pliocene and late Miocene transgressions in southern Patagonia (Argentina): Sr-87/Sr-86 ages of the pectinid "Chlamys" actinodes (Sowerby)

del Rio, CJ; Griffin, M; McArthur, JM; Martinez, S; Thirlwall, MF; (2013) Evidence for early Pliocene and late Miocene transgressions in southern Patagonia (Argentina): Sr-87/Sr-86 ages of the pectinid "Chlamys" actinodes (Sowerby). JOURNAL OF SOUTH AMERICAN EARTH SCIENCES , 47 220 - 229. 10.1016/j.jsames2013.08.004. Green open access

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Abstract

Numerical ages based on 87Sr/86Sr dating of calcitic shells belonging to the pectinid “Chlamys” actinodes (Sowerby) document the only late Miocene (Tortonian) sea flooding event in the Austral Basin at Cabo Buentiempo (8.95 ± 0.82 Ma, 2 s.e.), and provide evidence of the first documented early Pliocene (Zanclean) transgression in Argentina recorded at Cañadón Darwin (5.15 ± 0.18 Ma, 2 s.e., Austral Basin) and at Terraces of Cerro Laciar (5.10 ± 0.21 Ma, 2 s.e.), southern San Jorge Basin). The sedimentary rocks deposited during the Tortonian are correlated with the youngest beds deposited by the “Entrerriense Sea” that covered northern Patagonia. The Zanclean marine episode is correlated with the long-term cycle represented in the Southern Hemisphere by the flooding events recorded in Cockburn and James Ross Islands (Antarctica) and in North-Central Chile.

Type: Article
Title: Evidence for early Pliocene and late Miocene transgressions in southern Patagonia (Argentina): Sr-87/Sr-86 ages of the pectinid "Chlamys" actinodes (Sowerby)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jsames2013.08.004
Publisher version: http://dx.doi.org/10.1016/j.jsames2013.08.004
Additional information: ©� 2013 Elsevier Ltd. Open access under CC BY license. Open access
Keywords: Tortonian, Late Miocene, Zanclean, Early Pliocene, Patagonia, Argentina, Sr-87/Sr-86
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1415940
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