HR: 15:00h
AN: PP53A-05    [Abstracts]
TI: Paleoenvironmental and paleoclimatic investigations on Isla de los Estados, Argentina
AU: Björck, S
EM: Svante.Bjorck@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: Fernandez, M
EM: Marilen.Fernandez@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: Fernandez, M
EM: Marilen.Fernandez@geol.lu.se
AF: Laboratorio de Geología del Cuaternario, CADIC-CONICET, Ushuaia, 9410, Argentina
AU: Hjort, C
EM: Christian.Hjort@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: Ljung, K
EM: Karl.Ljung@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: Martinez, O
EM: oam1958@hotmail.com
AF: Universidad Nacional de la Patagonia San Juan Bosco, sede Esquel Ruta 259, Esquel, 9200, Argentina
AU: Möller, P
EM: Per.Moller@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: Ponce, F
EM: jfponce@cadic.gov.ar
AF: Laboratorio de Geología del Cuaternario, CADIC-CONICET, Ushuaia, 9410, Argentina
AU: Rabassa, J
EM: jrabassa@infovia.com.ar
AF: Laboratorio de Geología del Cuaternario, CADIC-CONICET, Ushuaia, 9410, Argentina
AU: Roig, F
EM: froig@lab.crcyt.edu.ar
AF: Laboratorio de Dendrocronología, IANGLIA-CONICET, CRICYT, Mendoza, 5500, Argentina
AU: Unkel, I
EM: Inmar.Unkel@geol.lu.se
AF: GeoBiosphere Science Centre, Department of Geology, Lund University, Lund, 22362, Sweden
AU: * Wohlfarth, B
EM: Barbara@geo.su.se
AF: Dept of Geology and Geochemistry, Stockholm University, Stockholm, 10961, Sweden
AB: The expedition in November-December 2005 to Isla de los Estados (Staten Island) off the southeastern tip of South America was a cooperative venture between Lund University (LU) and Stockholm University (SU) in Sweden and the CADIC-CONICET Institute in Ushuaia, Argentina. The aim of the expedition was threefold: (1) to extend the Swedish paleoclimatic "ATLANTIS"-project (Greenland, Iceland, Faroe Islands, Azores, Grenada, Tristan da Cunha; PI S Björck) to the southern part of the South American continent, (2) to connect earlier glacial and climate history reconstructions from the Antarctic Peninsula to equivalents north of the Drake Passage in southernmost South America, and (3) to complement paleo-information available from the Tierra del Fuego mainland with information from Isla de los Estados. Focus was on two areas in the northern and north-western part of the island, Bahía Colnett and Bahia Crossley. Detailed geomorphologic and stratigraphic mapping of glacial deposits were combined with sampling sediments for OSL dating. To reconstruct the paleoclimatic development of Isla de los Estados since the last ice retreat, four main peat bog/lake sites were cored and sampled. In addition, living trees of Nothofagus and old logs preserved in the peat were sampled for dendrochronological and dendroclimatological studies. Preliminary results show that the deglaciation of the study area occurred before 16500 cal yr BP. Detailed multi- proxy analyses of the four sequences are under way and first results will be presented.
DE: 1605 Abrupt/rapid climate change (4901, 8408)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Joint Assembly