Expedition 359 summary

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doi: 10.14379/iodp.proc.359.101.2017
Author(s): Betzler, Christian G.; Eberli, Gregor P.; Alvarez Zarikian, Carlos A.; Alonso-Garcia, Montserrat; Bialik, Or M.; Blättler, Clara L.; Guo, Junhua Adam; Haffen, Sébastien; Horozal, Senay; Inoue, Mayuri; Jovane, Luigi; Kroon, Dick; Lanci, Luca; Laya, Juan Carlos; Mee, Anna Ling Hui; Lüdmann, Thomas; Nakakuni, Masatoshi; Nath, Bejugam N.; Niino, Kaoru; Petruny, Loren M.; Pratiwi, Santi D.; Reijmer, John J. G.; Reolid, Jesús; Slagle, Angela L.; Sloss, Craig R.; Su Xiang; Swart, Peter K.; Wright, James D.; Yao Zhengquan; Young, Jeremy R.
International Ocean Discovery Program, Expedition 359 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Hamburg, Institute of Geology, Hamburg, Germany
Other:
University of Miami, United States
Texas A&M University, United States
Instituto Portugues do Mar e da Atmosfera, Portugal
University of Haifa, Israel
Volume Title: Proceedings of the International Ocean Discovery Program; Maldives monsoon and sea level; Expedition 359 of the riserless drilling platform; Darwin, Australia, to Colombo, Sri Lanka, Sites U1463-U1472, 30 September-30 November 2015
Volume Author(s): Betzler, Christian G.; Eberli, Gregor P.; Alvarez Zarikian, Carlos A.; Alonso-Garcia, Montserrat; Bialik, Or M.; Blättler, Clara L.; Guo, Junhua Adam; Haffen, Sébastien; Horozal, Senay; Inoue, Mayuri; Jovane, Luigi; Kroon, Dick; Lanci, Luca; Laya, Juan Carlos; Mee, Anna Ling Hui; Lüdmann, Thomas; Nakakuni, Masatoshi; Nath, Bejugam N.; Niino, Kaoru; Petruny, Loren M.; Pratiwi, Santi D.; Reijmer, John J. G.; Reolid, Jesús; Slagle, Angela L.; Sloss, Craig R.; Su Xiang; Swart, Peter K.; Wright, James D.; Yao Zhengquan; Young, Jeremy R.
Source: Proceedings of the International Ocean Discovery Program; Maldives monsoon and sea level; Expedition 359 of the riserless drilling platform; Darwin, Australia, to Colombo, Sri Lanka, Sites U1463-U1472, 30 September-30 November 2015, Christian G. Betzler, Gregor P. Eberli, Carlos A. Alvarez Zarikian, Montserrat Alonso-Garcia, Or M. Bialik, Clara L. Blättler, Junhua Adam Guo, Sébastien Haffen, Senay Horozal, Mayuri Inoue, Luigi Jovane, Dick Kroon, Luca Lanci, Juan Carlos Laya, Anna Ling Hui Mee, Thomas Lüdmann, Masatoshi Nakakuni, Bejugam N. Nath, Kaoru Niino, Loren M. Petruny, Santi D. Pratiwi, John J. G. Reijmer, Jesús Reolid, Angela L. Slagle, Craig R. Sloss, Su Xiang, Peter K. Swart, James D. Wright, Yao Zhengquan and Jeremy R. Young; International Ocean Discovery Program, Expedition 359 Scientists, College Station, TX. Proceedings of the International Ocean Discovery Program, Expedition Reports, Vol.359, 31p. Publisher: International Ocean Discovery Program, Washington, DC, United States. ISSN: 2377-3189 CODEN: IDSDA6
Note: In English. 45 refs.; illus., incl. sects., 1 table, sketch map
Summary: International Ocean Discovery Program Expedition 359 was designed to address changes in sea level and currents, along with monsoon evolution in the Indian Ocean. The Maldives archipelago holds a unique and mostly unread Indian Ocean archive of the evolving Cenozoic icehouse world. Cores from eight drill sites in the Inner Sea of the Maldives provide the tropical marine record that is key for better understanding the effects of this global evolution in the Indo-Pacific realm. In addition, the bank geometries of the carbonate archipelago provide a physical record of changing sea level and ocean currents. The bank growth occurs in pulses of aggradation and progradation that are controlled by sea level fluctuations during the early and middle Miocene, including the mid-Miocene Climate Optimum. A dramatic shift in development of the carbonate edifice from a sea level-controlled to a predominantly current controlled system appears to be directly linked to the evolving Indian monsoon. This phase led to a twofold configuration of bank development: bank growth continued in some parts of the edifice, whereas in other places, banks drowned. Drowning steps seem to coincide with onset and intensification of the monsoon-related current system and subsequent deposition of contourite fans and largescale sediment drifts. As such, the drift deposits will provide a continuous record of Indian monsoon development in the region of the Maldives. A major focus of Expedition 359 was to date precisely the onset of the current system. This goal was successfully completed during the expedition. The second important outcome of Expedition 359 was groundtruthing the hypothesis that the dramatic, pronounced change in style of the carbonate platform sequence stacking was caused by a combination of relative sea level fluctuations and ocean current system changes. These questions are directly addressed by the shipboard scientific data. In addition, Expedition 359 cores will provide a complete Neogene δ13C record of the platform and platform margin sediments and a comparison with pelagic records over the same time period. This comparison will allow assessment of the extent to which platform carbonates record changes in the global carbon cycle and whether changes in the carbon isotopic composition of organic and inorganic components covary and the implications this has on the deep-time record. This determination is important because such records are the only type that exists in deep time.
Year of Publication: 2017
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 20 Geophysics, Applied; Biostratigraphy; Boreholes; Carbonate platforms; Carbonate rocks; Cenozoic; Chemostratigraphy; Cores; Correlation; Expedition 359; Foraminifera; Geophysical methods; Geophysical profiles; Geophysical surveys; IODP Site U1465; IODP Site U1466; IODP Site U1467; IODP Site U1468; IODP Site U1469; IODP Site U1470; IODP Site U1471; IODP Site U1472; Indian Ocean; Indian Ocean Islands; International Ocean Discovery Program; Invertebrata; Maldive Islands; Marine sediments; Microfossils; Mineral composition; Miocene; Monsoons; Neogene; Ocean circulation; Paleo-oceanography; Paleoenvironment; Physical properties; Pleistocene; Pliocene; Protista; Quaternary; Sea-level changes; Sedimentary rocks; Sediments; Seismic methods; Seismic profiles; Seismic stratigraphy; Surveys; Tertiary; Well logs
Coordinates: N045559 N045559 E0730042 E0730041
N045559 N045559 E0730141 E0730141
N045101 N045103 E0731702 E0731701
N045559 N045559 E0730417 E0730417
N045425 N045425 E0730029 E0730028
N044559 N044559 E0725902 E0725901
N044559 N044559 E0730808 E0730806
N044616 N044616 E0730401 E0730401
Record ID: 2017039939
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.
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