Site C0002

Strasser, Michael; Dugan, Brandon; Kanagawa, Kyuichi; Moore, G. F.; Toczko, S.; Maeda, Lena; Kido, Yukari; Moe, Kyaw Thu; Yukitoshi, Sanada; Esteban, Lionel; Fabbri, Olivier; Geersen, Jacob; Hammerschmidt, Sebastian; Hayashi, Hiroki; Heirman, K.; Hüpers, Andre; Rodriguez, M.J. Jurado; Kameo, Koji; Kanamatsu, Toshiya; Kitajima, H.; Masuda, Harue; Milliken, Kitty L.; Mishra, Ravi; Motoyama, Isao; Olcott, K.; Oohashi, Kiyokazu; Pickering, KT; Ramirez, S.G.; Rashid, Harunur; Sawyer, Dale S.; Schleicher, Anja M.; Shan, Yehua; Skarbek, R.; Song, Insun; Takeshita, Toru; Toki, Takahiro; Tudge, J.; Webb, S.; Wilson, D.J.; Wu, H.-Y.; Yamaguchi, Asuka

doi:10.2204/iodp.proc.338.103.2014

Cited by 42 publications

(82 citation statements)

References 49 publications

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“…The stratigraphy of the studied interval correlates to lithologic Unit II of previous drilling at Site C0002. Unit II is mainly composed of dark olive-gray silty claystone with subordinate sandstone, sandy siltstone, and volcanic ash (see the "Site C0002" chapter [Strasser et al, 2014c]). We generally followed the analytical techniques described in the "Methods" chapter (Strasser et al, 2014b).…”

Section: Methodsmentioning

confidence: 99%

“…F2). Onboard geochemical analyses detected a gas hydrate zone (200-400 m CSF-A) and a minimum concentration zone of salinity, chlorinity, and Na + in pore water (300-500 m CSF-A) resulting from dissociation of methane hydrate (see the "Site C0002" chapter [Strasser et al, 2014c]). The purpose of this study is to describe the planktonic foraminiferal assemblages obtained from Holes C0002K and C0002L as a basic data set for the stratigraphy of the Kumano Basin region.…”

Section: Introductionmentioning

confidence: 99%

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Data report: Pleistocene planktonic foraminifers from the Kumano forearc basin, IODP Expedition 338 Holes C0002K and C0002L

Hayashi¹,

Suzuki²,

Fujimoto³

2016

Proceedings of the IODP

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This study describes the planktonic foraminiferal assemblages of Holes C0002K and C0002L drilled during Integrated Ocean Drilling Program Expedition 338 in the southern part of the Kumano forearc basin, northwestern Pacific Ocean. The stratigraphic interval of the studied holes is constrained within the Calabrian stage of the Pleistocene by onboard stratigraphic data. Thirty-six taxa belonging to fifteen genera of planktonic foraminifers were detected from the studied interval. Three biostratigraphic events of planktonic foraminifers were newly constrained at the present site. The planktonic foraminiferal assemblages mainly consist of mixed-water and cosmopolitan species associated with tropical and subtropical taxa.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Data report: Pleistocene planktonic foraminifers from the Kumano forearc basin, IODP Expedition 338 Holes C0002K and C0002L

Hayashi¹,

Suzuki²,

Fujimoto³

2016

Proceedings of the IODP

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“…Vein structures (Ogawa, 1980) were observed in cores and cuttings exclusively from Unit III in holes C0002F and C0002J. The lithologic Unit III/IV boundary is defined at different depths in holes C0002F and C0002J as a result of mixing of cuttings over an interval of as much as ∼ 100 m in C0002F, resulting in uncertainty of that depth magnitude (see Strasser et al, 2014a for a detailed discussion of reaming while drilling and the mixing of cuttings). The lithologic Unit III/IV boundary was cored at 926.7 m b.s.f.…”

Section: Site C0002 In Kumano Forearc Basinmentioning

confidence: 99%

“…The ratio of methane to ethane plus propane (C 1 /[C 2 + C 3 ]) and δ 13 C concentration in methane (δ 13 C-CH 4 ) suggest that the methane in the gas hydrate zone is mostly of microbial origin (Strasser et al, 2014a). The C 1 /(C 2 + C 3 ) and δ 13 C-CH 4 data of mud gas sampled during riser drilling in Hole C0002F show that thermogenic methane gradually increases with depth up to ∼ 50 % at ∼ 2000 m b.s.f.…”

Section: Site C0002 In Kumano Forearc Basinmentioning

confidence: 99%

IODP Expedition 338: NanTroSEIZE Stage 3: NanTroSEIZE plate boundary deep riser 2

et al. 2014

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Abstract. The Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) is designed to investigate fault mechanics and seismogenesis along a subduction megathrust, with objectives that include characterizing fault slip, strain accumulation, fault and wall rock composition, fault architecture, and state variables throughout an active plate boundary system. Integrated Ocean Drilling Program (IODP) Expedition 338 was planned to extend and case riser Hole C0002F from 856 to 3600 meters below the seafloor (m b.s.f.). Riser operations extended the hole to 2005.5 m b.s.f., collecting logging-while-drilling (LWD) and measurement-while-drilling, mud gas, and cuttings data. Results reveal two lithologic units within the inner wedge of the accretionary prism that are separated by a prominent fault zone at ∼ 1640 m b.s.f. Due to damage to the riser during unfavorable winds and strong currents, riser operations were suspended, and Hole C0002F left for re-entry during future riser drilling operations.Contingency riserless operations included coring at the forearc basin site (C0002) and at two slope basin sites (C0021 and C0022), and LWD at one input site (C0012) and at three slope basin sites (C0018, C0021 and C0022). Cores and logs from these sites comprehensively characterize the alteration stage of the oceanic basement input to the subduction zone, the early stage of Kumano Basin evolution, gas hydrates in the forearc basin, and recent activity of the shallow megasplay fault zone system and associated submarine landslides.

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“…IODP | Volume 338 5 tion (R 2 ) of 0.50. Archie's law with the parameters estimated based on density and resistivity logs at IODP Site C0002 during Expedition 314, a = 1 and m = 2.4 (Expedition 314 Scientists, 2009; see the "Site C0002" chapter [Strasser et al, 2014b]), is shown for comparison in Figure F10. Note that R 2 = 0.29 for the Site C0002 parameters.…”

Section: Site C0018mentioning

confidence: 99%

Site C0018

Strasser¹,

Dugan²,

Kanagawa³

et al. 2014

Proceedings of the IODP

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During Integrated Ocean Drilling Program (IODP) Expedition 338, a slope basin seaward of the megasplay fault was logged with logging while drilling (LWD)/measurement while drilling (MWD) at Site C0018. The slope basin, characterized in 3-D seismic data by stacked mass transport deposits (MTDs) was drilled and sampled during IODP Expedition 333 in Hole C0018A ( Fig. F1) (Expedition 333 Scientists, 2012a). The primary goals of operations at Site C0018 were to establish the stratigraphy of Quaternary mass-movement events and to sample the distal part of an exceptionally thick MTD for analyzing its rheological behavior to constrain sliding dynamics and tsunamigenic potential.Site C0018 (proposed Site NTS-1A; water depth = 3084.35 m) is located ~5 km southwest of IODP Sites C0004 and C0008, which were drilled and cored during IODP Expedition 316 (Figs. F1, F2). Site C0018 is located within a lower slope basin that (1) represents the depocenter for downslope mass transport, (2) is characterized by stacked MTDs that were seismically identified as acoustically transparent to chaotic bodies with ponded geometries (Fig. F2), and (3) includes a large (as thick as 182 m) MTD . Hole C0018A was drilled at a location where the MTD bodies wedge out and basal erosion is thought to be minimal. Coring to ~314.15 meters below seafloor (mbsf) allowed sampling of the MTDs across this stratigraphic succession.Sediment cored in Hole C0018A are divided into two lithologic subunits. Lithologic Subunit IA (0-190.65 mbsf) is primarily composed of hemipelagic mud (i.e., silty clay) with interbedded volcanic ash layers and is affected by MTDs, whereas lithologic .65 mbsf) is a sandy turbidite sequence (Expedition 333 Scientists, 2012a;Strasser et al., 2012). Six MTDs (numbered 1-6 from top to bottom) ranging in thickness from 50 cm to 61 m are identified within Subunit IA (Expedition 333 Scientists, 2012a;Strasser et al., 2012) (Fig. F3). These MTDs are composed of chaotic and convolute bedding with intervals of coherent bedding and commonly have bases defined by shear zones. A mass-movement event related to deposition of the lowermost and most prominent MTD 6 is younger than 1.05 Ma (because an ash layer immediately below the thick MTD 6 is identified as the one dated on land as 1.05 Ma) but older than 0.85 Ma, as constrained

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Site C0002

Cited by 42 publications

References 49 publications

Data report: Pleistocene planktonic foraminifers from the Kumano forearc basin, IODP Expedition 338 Holes C0002K and C0002L

Data report: Pleistocene planktonic foraminifers from the Kumano forearc basin, IODP Expedition 338 Holes C0002K and C0002L

IODP Expedition 338: NanTroSEIZE Stage 3: NanTroSEIZE plate boundary deep riser 2

Site C0018

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