Data report; Paleomagnetism and rock magnetism of sediments from offshore Canterbury Basin, IODP Expedition 317

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doi: 10.2204/iodp.proc.317.206.2014
Author(s): Dinares-Turell, Jaume; Tinto, Kirsty
Integrated Ocean Drilling Program, Expedition 317 Scientists, College Station, TX
Author Affiliation(s): Primary:
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Shinshu University, Japan
Texas A&M University, United States
Lamont-Doherty Earth Observatory, United States
Florida State University, United States
GNS Science, New Zealand
James Cook University of North Queensland, Australia
Institut Universitaire Européen de la Mer, France
Istituto Nazionale di Geofisica e Vulcanologia, Italy
China University of Geosciences, China
Macquarie University, Australia
University of Bremen, Germany
University of Florida, United States
Yokohama National University, Japan
University of Cambridge, United Kingdom
Seoul National University, South Korea
Western Michigan University, United States
Heriot-Watt University, United Kingdom
California State University at Northridge, United States
CUNY at Queens College, United States
Kumamoto University, Japan
Universita degli Studi di Parma, Italy
California State University at Fresno, United States
Nagoya University, Japan
National Institute of Advanced Industrial Science and Technology, Japan
Otago University, New Zealand
Chiba University, Japan
University of Tokyo, Japan
University of Otago, New Zealand
Volume Title: Proceedings of the Integrated Ocean Drilling Program; Canterbury Basin sea level; Expedition 317 of the riserless drilling platform; Townsville, Australia, to Wellington, New Zealand, Sites U1351-U1354, 4 November 2009-3 January 2010
Volume Author(s): Fulthorpe, Craig S.; Hoyanagi, Koichi; Blum, Peter; Guérin, Gilles; Slagle, Angela L.; Blair, Stacie A.; Browne, Gregory H.; Carter, Robert M.; Ciobanu, Maria-Cristina; Claypool, George E.; Crundwell, Martin P.; Dinares-Turell, Jaume; Xuan Ding; George, Simon C.; Hepp, Daniel A.; Jaeger, John; Kawagata, Shungo; Kemp, David B.; Kim, Young-Gyun; Kominz, Michelle A.; Lever, Helen; Lipp, Julius; Marsaglia, Kathleen M.; McHugh, Cecilia M.; Murakoshi, Naomi; Ohi, Takeshi; Pea, Laura; Richaud, Mathieu; Suto, Itsuki; Tanabe, Susumu; Tinto, Kirsteen J.; Uramoto, Goichiro; Yoshimura, Toshihiro
Source: Proceedings of the Integrated Ocean Drilling Program; Canterbury Basin sea level; Expedition 317 of the riserless drilling platform; Townsville, Australia, to Wellington, New Zealand, Sites U1351-U1354, 4 November 2009-3 January 2010, Craig S. Fulthorpe, Koichi Hoyanagi, Peter Blum, Gilles Guérin, Angela L. Slagle, Stacie A. Blair, Gregory H. Browne, Robert M. Carter, Maria-Cristina Ciobanu, George E. Claypool, Martin P. Crundwell, Jaume Dinares-Turell, Xuan Ding, Simon C. George, Daniel A. Hepp, John Jaeger, Shungo Kawagata, David B. Kemp, Young-Gyun Kim, Michelle A. Kominz, Helen Lever, Julius Lipp, Kathleen M. Marsaglia, Cecilia M. McHugh, Naomi Murakoshi, Takeshi Ohi, Laura Pea, Mathieu Richaud, Itsuki Suto, Susumu Tanabe, Kirsteen J. Tinto, Goichiro Uramoto and Toshihiro Yoshimura; Integrated Ocean Drilling Program, Expedition 317 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program (Online), Vol.317, 31p. Publisher: Integrated Ocean Drilling Program Management International for the Integrated Drilling Program (IODP), Washington, DC, United States. ISSN: 1930-1014 CODEN: IDSDA6
Note: In English. 12 refs.; illus., incl. 4 tables
Summary: Paleomagnetic and rock magnetic analyses were conducted on discrete samples from sediments drilled during Integrated Ocean Drilling Program Expedition 317 in the Canterbury Basin offshore New Zealand to assess the nature of magnetic remanence and to evaluate the directional data for a magnetic reversal stratigraphy. The sediments consist of relatively coarse grained lithologies from shelf to slope settings. The presence of several hiatuses, together with very low core recovery in some intervals as well as drilling-related magnetic overprints, prevented establishment of a good shipboard magnetostratigraphy. In an effort to overcome some of the magnetic shortcomings and to substantiate shipboard measurements (overprints and partial demagnetization to 20 mT), natural remanent magnetization and subsequent full stepwise alternating field or thermal demagnetization measurements were taken on 765 individual discrete samples from Holes U1351B (131 samples), U1352B/U1352C (485 samples), U1353B (54 samples), and U1354B/U1354C (95 samples). Some rock magnetic measurements, including thermomagnetic curves, were taken on a few representative samples to acquire information on the magnetic carriers. The remanence intensity of the sediments is relatively low (usually 10 -3 to 10 -5 A/m) and often displays unstable behavior upon demagnetization. Demagnetization data have been separated into four different classes based on their quality. Classes 1 and 2 are of sufficient quality to be used for magnetostratigraphic purposes and represent ∼40% of the studied samples (although some of them could still represent a steep magnetic drilling overprint). Considering the calculated characteristic remanent magnetization inclination, a number of polarity zones can be defined. However, the fragmentary nature of the data set, mostly related to core recovery in addition to detected and undetected sedimentary hiatuses, makes determination of the precise position of the reversal boundaries and their correlation to the geomagnetic polarity timescale a difficult task. Nevertheless, when combined shipboard and postcruise discrete measurements are placed within biostratigraphic constraints, some magnetostratigraphic insights can potentially refine the available age model. These insights include the identification of the Matuyama/Brunhes boundary (C1r1r/C1n, 0.778 Ma) at all four sites, the Gauss/Matuyama boundary (C2An.1n/C2r.2r, 2.581 Ma) in Hole U1351B, and also the position of the Olduvai Subchron (C2n, 1.778-1.945 Ma) in Hole U1351B, which relates to the position of the classical Pliocene/Pleistocene boundary.
Year of Publication: 2014
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 18 Geophysics, Solid-Earth; Boreholes; Brunhes Chron; Canterbury Basin; Cenozoic; Characteristic remanent magnetization; Continental shelf; Continental slope; Cores; Expedition 317; IODP Site U1351; IODP Site U1352; IODP Site U1353; IODP Site U1354; Integrated Ocean Drilling Program; Isothermal remanent magnetization; Magnetic inclination; Magnetization; Magnetostratigraphy; Marine sediments; Matuyama Chron; Natural remanent magnetization; Pacific Ocean; Paleomagnetism; Quaternary; Remanent magnetization; Reversals; Sediments; South Pacific; Southwest Pacific; Upper Cenozoic; Upper Quaternary; West Pacific
Coordinates: S445303 S445303 E1715024 E1715024
S445615 S445615 E1720122 E1720122
S444607 S444607 E1714026 E1714026
S445050 S445050 E1714712 E1714712
Record ID: 2014035297
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