Guo, Junhua and Underwood, Michael B. (2011): Refined method for calculating percentages of kaolinite and chlorite from X-ray diffraction data, with application to the Nankai Margin of southwest Japan
Leg/Site/Hole:
Related Expeditions:
ODP 190
Identifier:
ID:
2012-011234
Type:
georefid
ID:
10.2204/iodp.proc.314315316.201.2011
Type:
doi
Creator:
Name:
Guo, Junhua
Affiliation:
University of Missouri, Department of Geological Sciences, Columbia, MO, United States
Role:
author
Name:
Underwood, Michael B.
Affiliation:
University of Wisconsin, Madison, United States
Role:
author
Identification:
Title:
Refined method for calculating percentages of kaolinite and chlorite from X-ray diffraction data, with application to the Nankai Margin of southwest Japan
Year:
2011
Source:
In: Kinoshita, Masataka, Tobin, Harold, Thu, Moe Kyaw, Gaillot, Philippe, Bourlange, Sylvain, Chang, Chandong, Conin, Marianne, Gulick, Sean, Rodriguez, Maria Jose Jurado, Martin, Kylara M., McNeill, Lisa, Miyakawa, Ayumu, Moore, J. Casey, Nakamura, Yasuyuki, Saito, Saneatsu, Sawyer, Dale S., Tudge, Joanne, Yamada, Yasuhiro, Ashi, Juichiro, Lallemant, Siegfried, Masago, Hideki, Behrmann, Jan H., Boeckel, Babette, Byrne, Timothy, Calves, Gerome, Famin, Vincent, Guo, Junhua, Hashimoto, Yoshitaka, Hayashi, Hiroki, Henry, Pierre, Hirono, Tetsuro, Hulme, Samuel M., Kaksonen, Anna Henriikka, Kanagawa, Kyuichi, Kanamatsu, Toshiya, Kopf, Achim, Lewis, Jonathan C., Likos, William John, Pares, Josep Maria, Saito, Hiroyuki, Schmidt-Schierhorn, Friederike, Tomaru, Hitoshi, Underwood, Michael B., Zhu, Wen-Lu, Kimura, Gaku, Screaton, Elizabeth J., Curewitz, Daniel, Chester, Frederick, Fabbri, Olivier, Fergusson, Chris, Girault, France E., Goldsby, David, Harris, Robert, Inagaki, Fumio, Jiang, Tao, Kitamura, Yujin, Knuth, Matt, Li Chunfeng, Liljedahl, Lillemor Claesson, Louis, Laurent, Milliken, Kitty, Nicholson, Uisdean, Riedinger, Natascha, Sakaguchi, Arito, Solomon, Evan, Strasser, Michael, Su Xin, Tsutsumi, Akito, Ujiie, Kohtaro, Yamaguchi, Asuka, Xixi, Zhao, Proceedings of the Integrated Ocean Drilling Program NanTroSEIZE Stage 1; investigations of seismogenesis, Nankai Trough, Japan; Expeditions 314, 315, and 316 of the riser drilling platform from and to Shingu, Japan; Sites C0001-C0006, 21 September-15 November 2007; and Sites C0001 and C0002, 16 November-18 December 2007; and Sites C0004 and C0006-C0008, 19 December 2007-5 February 2008
Publisher:
IODP Management International, Washington, DC, United States
Volume:
314/315/316
Issue:
Pages:
Abstract:
Calculating accurate percentages of kaolinite and chlorite in marine sediments using X-ray diffraction (XRD) data is challenging because the minerals have similar d-values. Most approaches use a peak-intensity ratio or fitted-peak-area ratio and assume a linear fit between the ratio and the concentration of each mineral. To test this assumption, we mixed various proportions of kaolinite and chlorite standards and calculated each mineral's individual peak area (PA) at approximately 3.5 Aa along with the total area (TA) of the composite peak. A power function provides the best correlation coefficient for regression curves of the ratio of PA/TA versus the actual mineral concentration (weight percent). The average error using a doubled half-peak area approach is 2.6%. We tested the utility of the method by analyzing data from natural mudstone specimens from Ocean Drilling Program Sites 1177 and 1178 (central and western Nankai Trough). This documentation of temporal changes in concentrations of chlorite and kaolinite provides a basis for improved XRD analyses and interpretations of sediment provenance during the Integrated Ocean Drilling Program's Nankai Trough Seismogenic Zone Experiment.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:32.4400 West:134.0000 East:
134.2900 South:31.3900
Keywords: Geochemistry of rocks, soils, and sediments; Asia; boreholes; chlorite; chlorite group; clastic rocks; clay minerals; concentration; continental margin; cores; diffractograms; experimental studies; Far East; Honshu; Japan; kaolinite; Kii Peninsula; laboratory studies; Leg 190; methods; mudstone; Nankai Trough; North Pacific; Northwest Pacific; Ocean Drilling Program; ODP Site 1177; ODP Site 1178; Pacific Ocean; sedimentary rocks; sheet silicates; Shikoku Basin; silicates; West Pacific; X-ray diffraction data;
.