Data report; Revised age models for IODP Sites U1480 and U1481, Expedition 362

Online Access: Get full text
doi: 10.14379/iodp.proc.362.202.2019
Author(s): Backman, Jan; Chen Wenchuang; Kachovich, Sarah; Mitchison, Freya L.; Petronotis, Katerina E.; Yang Tao; Zhao, Xixi
International Ocean Discovery Program, Expedition 362 Scientists, College Station, TX
Author Affiliation(s): Primary:
Stockholm University, Department of Geological Sciences, Stockholm, Sweden
Other:
Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, China
University of Queensland, Australia
Cardiff University, United Kingdom
Texas A&M University, United States
China Earthquake Administration, China
University of California at Santa Cruz, United States
Volume Title: Proceedings of the International Ocean Discovery Program; Sumatra subduction zone; Expedition 362 of the riserless drilling platform, Colombo, Sri Lanka, to Singapore; Sites U1480-U1481, 6 August-6 October 2016
Volume Author(s): McNeill, Lisa C.; Dugan, Brandon; Petronotis, Katerina E.; Backman, Jan; Bourlange, Sylvain; Chemale, Farid, Jr.; Chen Wenhuang; Colson, Tobias A.; Frederik, Marina C. G.; Guérin, Gilles; Hamahashi, Mari; Henstock, Timothy; House, Brian M.; Hüpers, Andre; Jeppson, Tamara N.; Kachovich, Sarah; Kenigsberg, Abby R.; Kuranaga, Mebae; Kutterolf, Steffen; Milliken, Kitty L.; Mitchison, Freya L.; Mukoyoshi, Hideki; Nair, Nisha; Owari, Satoko; Pickering, Kevin T.; Pouderoux, Hugo F. A.; Shan Yehua; Song, Insun; Torres, Marta E.; Vannucchi, Paola; Vrolijk, Peter J.; Yang Tao; Zhao, Xixi
Source: Proceedings of the International Ocean Discovery Program; Sumatra subduction zone; Expedition 362 of the riserless drilling platform, Colombo, Sri Lanka, to Singapore; Sites U1480-U1481, 6 August-6 October 2016, Lisa C. McNeill, Brandon Dugan, Katerina E. Petronotis, Jan Backman, Sylvain Bourlange, Farid Chemale, Jr., Chen Wenhuang, Tobias A. Colson, Marina C. G. Frederik, Gilles Guérin, Mari Hamahashi, Timothy Henstock, Brian M. House, Andre Hüpers, Tamara N. Jeppson, Sarah Kachovich, Abby R. Kenigsberg, Mebae Kuranaga, Steffen Kutterolf, Kitty L. Milliken, Freya L. Mitchison, Hideki Mukoyoshi, Nisha Nair, Satoko Owari, Kevin T. Pickering, Hugo F. A. Pouderoux, Shan Yehua, Insun Song, Marta E. Torres, Paola Vannucchi, Peter J. Vrolijk, Yang Tao and Xixi Zhao; International Ocean Discovery Program, Expedition 362 Scientists, College Station, TX. Proceedings of the International Ocean Discovery Program, Expedition Reports, Vol.362, 7p. Publisher: International Ocean Discovery Program, Washington, DC, United States. ISSN: 2377-3189 CODEN: IDSDA6
Note: In English. 17 refs.; illus.
Summary: A revised age model for Site U1480 was generated for the 0-67 Ma time interval using biomagnetostratigraphic data from which age-depth tie points have been selected to determine sediment accumulation rates and durations of identified hiatuses. This revised age model relies on biostratigraphic data between ∼2 and 67 Ma and biomagnetostratigraphic data between 0 and 1.8 Ma and differs from the shipboard age model in terms of (1) the timing and duration of the major Cenozoic hiatus, (2) the late Miocene-early Pliocene transition, (3) the 0-1.8 Ma interval, and (4) the age of the sediment/volcanic interface at 1415 meters below seafloor (mbsf), here determined to be =67.4 Ma. Two intervals of igneous strata totaling 60 m occur in the Paleocene sedimentary rock sequence, giving a thickness of 1355 m for sediments and sedimentary rocks. In Hole U1481A, sedimentary rocks were recovered between 1150 and 1499 mbsf. The revised age model differs from the shipboard version mainly in more clearly acknowledging the lack of biostratigraphic data between 1411 and 1495 mbsf.
Year of Publication: 2019
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Biostratigraphy; Boreholes; Cenozoic; Chronostratigraphy; Cores; Cretaceous; Depositional environment; Diatoms; Expedition 362; Foraminifera; IODP Site U1480; IODP Site U1481; Indian Ocean; International Ocean Discovery Program; Lithofacies; Maestrichtian; Magnetostratigraphy; Marine environment; Mesozoic; Microfossils; Miocene; Nannofossils; Neogene; Paleocene; Paleogene; Pleistocene; Pliocene; Quaternary; Radiolaria; Stratigraphic gaps; Tertiary; Upper Cretaceous; Upper Maestrichtian
Coordinates: N030203 N030203 E0913621 E0913621
N024516 N024516 E0914535 E0914535
Record ID: 2019074212
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.