Cleaveland, Laura C. and Herbert, Timothy D. (2009): Preservation of the alkenone paleotemperature proxy in uplifted marine sequences; a test from the Vrica outcrop, Crotone, Italy

Leg/Site/Hole:
ODP 160
ODP 160 964
Identifier:
2009-031193
georefid

10.1130/G25148A.1
doi

Creator:
Cleaveland, Laura C.
Brown University, Department of Geological Sciences, Providence, RI, United States
author

Herbert, Timothy D.
author

Identification:
Preservation of the alkenone paleotemperature proxy in uplifted marine sequences; a test from the Vrica outcrop, Crotone, Italy
2009
Geology (Boulder)
Geological Society of America (GSA), Boulder, CO, United States
37
2
179-182
The alkenone organic paleotemperature proxy has been used with great success to generate sea-surface temperature (SST) records from diverse areas of the world ocean. To date, however, this methodology has been applied almost exclusively to unconsolidated marine sediments; the fidelity of alkenone preservation in lithified, uplifted marine sequences exposed on land has not been explicitly investigated. Such sedimentary sequences have been buried at depths of hundreds of meters to kilometers before uplift, and in addition have been exposed to oxic pore fluids and subaerial weathering upon ascent to the surface, any of which may cause alteration of biomarker compounds. In this study, we compare alkenone SST estimates from the Vrica land section in Crotone, Italy, with alkenone SST estimates derived from coeval marine sediments retrieved at Ocean Drilling Program Site 964, which is approximately 300 km offshore of the Vrica location. We find that SST records from the land and marine sections are well correlated, showing similar mean values, cyclicity, and amplitudes. Although results from different sedimentary sequences might depend on the lithologies, burial depths, and weathering histories of individual outcrops, this study suggests that it will be possible to reconstruct quantitative SST histories from marine strata exposed on land.
English
Serial
Coverage:Geographic coordinates:
North:39.1500
West:17.0000East: 17.4500
South:36.1538

Quaternary geology; alkenones; Calabria Italy; Cenozoic; clastic rocks; claystone; correlation; Crotone Italy; East Mediterranean; Europe; geochemistry; Italy; ketones; Leg 160; marine environment; marl; Mediterranean Sea; nearshore environment; Ocean Drilling Program; ODP Site 964; organic compounds; outcrops; paleo-oceanography; paleoclimatology; paleotemperature; planar bedding structures; Pleistocene; Quaternary; rhythmic bedding; sea-surface temperature; sedimentary rocks; sedimentary structures; sedimentation rates; Southern Europe; uplifts; upper Pleistocene; Vrica Italy;

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