Data report; Visible and near-infrared spectroscopy as an indicator of hydration in the upper oceanic crust of ODP Site 1256

Online Access: Get full text
doi: 10.2973/odp.proc.sr.206.012.2007
Author(s): Kerneklian, Marcie J.; Jarrard, Richard D.
Ocean Drilling Program, Leg 206, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University of Utah, Department of Geology and Geophysics, Salt Lake City, UT, United States
Other:
University of California, Santa Barbara, United States
Ocean Drilling Program, United States
University of Michigan, United States
University of Alberta, Canada
University of Leicester, United Kingdom
California Institute of Technology, United States
Universita di Genova, Italy
Université de Montpellier II, France
Florida State University, United States
Bundesanstalt für Geowissenschaften und Rohstoffe, Federal Republic of Germany
University of Utah, United States
Universitë de Aix-Marseille, France
Christian-Albrechts-Universität zu Kiel, Federal Republic of Germany
Macquarie University, Australia
Universita di Milano, Italy
Shizuoka University, Japan
Boston University, United States
Volume Title: Proceedings of the Ocean Drilling Program; volume 206; scientific results; an in situ section of the upper oceanic crust formed by superfast seafloor spreading; covering Leg 206 of the cruises of the drilling vessel JOIDES Resolution; Balboa, Panama to Balboa, Panama; Site 1256; 6 November 2002-4 January 2003
Volume Author(s): Teagle, Damon A. H.; Wilson, Douglas S.; Acton, Gary D.; Alt, Jeffrey C.; Banerjee, Neil R.; Barr, Samantha R.; Coggon, Rosalind; Cooper, Kari M.; Crispini, Laura; Einaudi, Florence; Jiang, Shijun; Kalberkamp, Ulrich; Kerneklian, Marcie J.; Laverne, Christine; Nichols, Holly J.; Sandwell, Rachel; Tartarotti, Paola; Umino, Susumu; Ziegler, Christa
Source: Proceedings of the Ocean Drilling Program; volume 206; scientific results; an in situ section of the upper oceanic crust formed by superfast seafloor spreading; covering Leg 206 of the cruises of the drilling vessel JOIDES Resolution; Balboa, Panama to Balboa, Panama; Site 1256; 6 November 2002-4 January 2003, Damon A. H. Teagle, Douglas S. Wilson, Gary D. Acton, Jeffrey C. Alt, Neil R. Banerjee, Samantha R. Barr, Rosalind Coggon, Kari M. Cooper, Laura Crispini, Florence Einaudi, Shijun Jiang, Ulrich Kalberkamp, Marcie J. Kerneklian, Christine Laverne, Holly J. Nichols, Rachel Sandwell, Paola Tartarotti, Susumu Umino and Christa Ziegler; Ocean Drilling Program, Leg 206, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.206, 13p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. 14 refs.CD-ROM format, ISSN 1096-2514; WWW format, 1096-7451; illus.
Summary: For extrusive basalts of the upper oceanic crust, near-infrared radiation is reflected with a spectrum that is sensitive to the extent of crustal alteration. A published pilot study of basalts from Hole 801C showed that reflectance-based apparent alteration correlated with independent geophysical indicators of alteration (e.g., matrix density). This study shows that reflectance-based hydration correlates with geochemical measurements of structural water percentage and that air-dried archive half cores exhibit more reflectance-based hydration than do vacuumdried minicores. We calibrate the spectral response of visible and near-infrared spectroscopy (VNIS) with 907 measurements from seven basalt sites. The relationship between VNIS hydration estimates and geochemical measurements of structural water was determined, and a VNISbased estimate of relative smectite abundance was produced by factor analysis of three spectral characteristics. We used this calibration to estimate variations in hydration and smectite abundance throughout the 502-m section of upper oceanic crust at Ocean Drilling Program Site 1256, based on 2327 VNIS measurements on archive-half cores and 88 measurements on minicores.
Year of Publication: 2007
Research Program: ODP Ocean Drilling Program
Key Words: 05 Petrology, Igneous and Metamorphic; Alteration; Atomic absorption spectra; Basalts; Boreholes; Clay minerals; Cores; Crust; East Pacific; East Pacific Rise; Equatorial Pacific; Guatemala Basin; Hydration; Igneous rocks; Leg 206; Mineral composition; Near-infrared spectra; North Pacific; Northeast Pacific; ODP Site 1256; Ocean Drilling Program; Oceanic crust; Pacific Ocean; Sheet silicates; Silicates; Smectite; Spectra; Upper crust; Volcanic rocks
Coordinates: N064400 N064400 W0915600 W0915600
Record ID: 2007124235
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.