Data report; Clay mineral assemblages in cuttings from Hole C0002F, IODP Expedition 338, upper Nankai Trough accretionary prism

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doi: 10.2204/iodp.proc.338.206.2016
Author(s): Underwood, Michael B.; Song, Chen
Integrated Ocean Drilling Program, Expedition 338 Scientists, College Station, TX
Author Affiliation(s): Primary:
New Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorro, NM, United States
Other:
University of Missouri, United States
Volume Title: Proceedings of the Integrated Ocean Drilling Program; NanTroSEIZE Stage 3; NanTroSEIZE plate boundary deep riser 2; Expedition 338 of the riser drilling platform from and to Shimizu, Japan; Sites C0002, C0012, C0018, and C0021-C0022, 1 October 2012-13 January 2013
Volume Author(s): Strasser, Michael; Dugan, Brandon; Kanagawa, Kyuichi; Moore, Gregory; Toczko, Sean; Maeda, Lena; Kido, Yukari; Thu, Moe Kyaw; Sanada, Yoshinori; Esteban, Lionel; Fabbri, Olivier; Geersen, Jacob; Hammerschmidt, Sebastian; Hayashi, Hiroki; Heirman, Katrien; Hüpers, Andre; Jurado Rodriguez, Maria José; Kameo, Koji; Kanamatsu, Toshiya; Kitajima, Hiroko; Masuda, Harue; Milliken, Kitty; Mishra, Ravi; Motoyama, Isao; Olcott, Katelyn; Oohashi, Kiyokazu; Pickering, Kevin T.; Ramirez, Sebastian G.; Rashid, Harunur; Sawyer, Derek; Schleicher, Anja; Shan Yehua
Source: Proceedings of the Integrated Ocean Drilling Program; NanTroSEIZE Stage 3; NanTroSEIZE plate boundary deep riser 2; Expedition 338 of the riser drilling platform from and to Shimizu, Japan; Sites C0002, C0012, C0018, and C0021-C0022, 1 October 2012-13 January 2013, Michael Strasser, Brandon Dugan, Kyuichi Kanagawa, Gregory Moore, Sean Toczko, Lena Maeda, Yukari Kido, Moe Kyaw Thu, Yoshinori Sanada, Lionel Esteban, Olivier Fabbri, Jacob Geersen, Sebastian Hammerschmidt, Hiroki Hayashi, Katrien Heirman, Andre Hüpers, Maria José Jurado Rodriguez, Koji Kameo, Toshiya Kanamatsu, Hiroko Kitajima, Harue Masuda, Kitty Milliken, Ravi Mishra, Isao Motoyama, Katelyn Olcott, Kiyokazu Oohashi, Kevin T. Pickering, Sebastian G. Ramirez, Harunur Rashid, Derek Sawyer, Anja Schleicher and Shan Yehua; Integrated Ocean Drilling Program, Expedition 338 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program, Vol.338, 15p. Publisher: International Ocean Discovery Program, Washington, DC, United States. ISSN: 1930-1014 CODEN: IDSDA6
Note: In English. 32 refs.; illus., incl. sects., 3 tables, sketch map
Summary: This report summarizes the results of X-ray diffraction analyses of cuttings samples (1-4 mm diameter) from Integrated Ocean Drilling Program Expedition 338 Hole C0002F, located offshore southwest Japan. We analyzed 37 specimens (<2 µm size fraction) from the upper Nankai accretionary prism, collected between 1190 and 1990 meters below seafloor. Smectite is generally the most abundant mineral in the clay-size fraction. Within lithologic Unit IV, smectite in the bulk sediment averages 25.1 wt% (standard deviation = 3.6), whereas illite and kaolinite + chlorite average 18.9 (standard deviation = 2.0) and 11.3 wt% (standard deviation = 2.3), respectively. Within Unit V, smectite in the bulk sediment decreases to an average of 21.8 wt% (standard deviation = 2.8) and values of illite and kaolinite + chlorite average 21.8 (standard deviation = 3.5) and 14.1 wt% (standard deviation = 3.5 and 2.4), respectively. The expandability of illite/smectite averages 69%, and values decrease downhole. The proportion of illite in illite/smectite mixed-layer clays averages 25%, and those values increase downhole. Values of illite crystallinity index (average = 0.52Δ°2θ) are consistent with detrital source areas exposed to advanced levels of diagenesis and anchizone metamorphism.
Year of Publication: 2016
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 02 Geochemistry; 06 Petrology, Sedimentary; Accretionary wedges; Asia; Boreholes; Chlorite; Chlorite group; Clastic rocks; Clay minerals; Continental margin; Cuttings; Diagenesis; Expedition 338; Far East; Honshu; IODP Site C0002; Illite; Integrated Ocean Drilling Program; Japan; Kaolinite; Kii Peninsula; Kumano Basin; Mineral assemblages; Mineral composition; Mudstone; NanTroSEIZE; Nankai Trough; North Pacific; Northwest Pacific; Pacific Ocean; Sedimentary rocks; Sheet silicates; Silicates; Smectite; West Pacific; X-ray diffraction data
Coordinates: N331800 N331801 E1363801 E1363800
Record ID: 2016085299
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.