Integrated Ocean Drilling Program Expedition 325 preliminary report; Great Barrier Reef environmental changes; the last deglacial sea level rise in the South Pacific; offshore drilling northeast Australia; platform operations, 11 February-7 April 2010; Onshore Science Party, 2-16 July 2010

Online Access: Get full text
doi: 10.2204/iodp.pr.325.2010
Author(s): Webster, Jody M.; Yokoyama, Yusuke; Cotterill, Carol; Anderson, Louise; Green, Sophie; Bourillot, Raphael; Braga, Juan Carlos; Droxler, Andre; Esat, Tezer; Felis, Thomas; Fujita, Kazuhiko; Gagan, Michael; Gischler, Eberhard; Herrero-Bervera, Emilio; Jiang Hongchen; Humblet, Marc; Inoue, Mayuri; Lado Insua, Tania; Iryu, Yasufumi; Jovane, Luigi; Kan, Hironobu; Linsley, Braddock; Loggia, Didier; Mills, Heath; Potts, Donald; Seard, Claire; Suzuki, Atsushi; Thomas, Alex; Thomspon, William; Tiwari, Manish; Tudhope, Alexander
Integrated Ocean Drilling Program, Expedition 325 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Sydney, School of Geosciences, Sydney, N.S.W., Australia
Other:
University of Tokyo, Japan
British Geological Survey, United Kingdom
University of Leicester, United Kingdom
Université de Bourgogne, France
Universidad de Granada, Spain
Rice University, United States
Australian Nuclear Science and Technology Organization, Australia
University of Bremen, Federal Republic of Germany
University of the Ryukyus, Japan
Australian National University, Australia
J. W. Goethe-Universitaet, Federal Republic of Germany
Hawaii Institute of Geophysics, United States
China University of Geosciences, China
University of Rhode Island, United States
Nagoya University, Japan
Western Washington University, United States
Okayama University, Japan
State University of New York-Albany, United States
Université de Montpellier II, France
Texas A&M University, United States
University of California-Santa Cruz, United States
CEREGE, France
Geological Survey of Japan, Japan
University of Oxford, United Kingdom
Woods Hole Oceanographic Institution, United States
National Centre for Antarctic and Ocean Research, India
University of Edinburgh, United Kingdom
Source: Preliminary Report (Integrated Ocean Drilling Program), Vol.325, 127p. Publisher: IODP Management International, College Station, TX, United States. ISSN: 1932-9423
Note: In English. Supplemental information/data is available in the online version of this article. 93 refs.
Summary: Integrated Ocean Drilling Program (IODP) Expedition 325, designed to investigate the fossil reefs on the shelf edge of the Great Barrier Reef, was the fourth expedition to utilize a mission-specific platform and was conducted by the European Consortium for Ocean Research Drilling (ECORD) Science Operator (ESO). The objectives of Expedition 325 are to establish the course of sea level change, to define sea-surface temperature variations, and to analyze the impact of these environmental changes on reef growth and geometry for the region over the period of 20-10 ka. To meet these objectives, a succession of fossil reef structures preserved on the shelf edge seaward of the modern barrier reef were cored from a dynamically positioned vessel in February-April 2010. A total of 34 boreholes across 17 sites were cored in depths ranging from 42.27 to 167.14 meters below sea level (lowest astronomical tide [LAT] taken from corrected EM300 multibeam bathymetry data). Borehole logging operations in four boreholes provided continuous geophysical information about the drilled strata. The cores were described during the Onshore Science Party (OSP) at the IODP Bremen Core Repository (Germany) in July 2010, where minimum and some standard measurements were made. Preliminary shipboard dating of core catcher samples and initial observations of the cores made during the OSP confirm that coral reef material ranging in age from >30 to 9 ka was recovered during Expedition 325. Further postcruise research on samples taken during the OSP is expected to fulfill the objectives of the expedition.
Year of Publication: 2010
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Anthozoa; Australasia; Australia; Biostratigraphy; Body waves; Boreholes; Boundstone; Carbonate rocks; Cenozoic; Chronostratigraphy; Cnidaria; Continental shelf; Coral Sea; Cores; Deglaciation; Density; Drilling; Elastic waves; Electrical conductivity; Expedition 325; Great Barrier Reef; Holocene; Integrated Ocean Drilling Program; Invertebrata; Limestone; Lithostratigraphy; Magnetic properties; Magnetic susceptibility; Marine drilling; Marine sediments; Microbialite; P-waves; Pacific Ocean; Paleoclimatology; Paleomagnetism; Physical properties; Pleistocene; Porosity; Quaternary; Queensland Australia; Reefs; Resistivity; Sea-level changes; Sedimentary rocks; Sediments; Seismic waves; South Pacific; Southwest Pacific; Upper Pleistocene; Velocity; Well logs; West Pacific
Coordinates: S200000 S150000 E1510000 E1450000
Record ID: 2010098057
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute.