Microbial green marine clay from Izu-Bonin (West Pacific) deep-sea sediments

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doi: 10.1016/0009-2541(92)90149-Y
Author(s): Tazaki, Kazue; Fyfe, William S.
Author Affiliation(s): Primary:
Shimane University, Department of Geology, Shimane, Japan
University of Western Ontario, Canada
Volume Title: Chemical Geology
Source: Chemical Geology, 102(1-4), p.105-118. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541 CODEN: CHGEAD
Note: In English. 16 refs.; illus. incl. 2 tables
Summary: Microbial marine clays in deep-sea sediments were recovered from the Izu-Bonin fore-arc basin at Leg 126 of the Ocean Drilling Program along the Bonin-Mariana trench. Green spherical materials and remnants of dead microbial cells of filamentous bacteria are abundant in the green marine clays. Organic C and graphite were found in the volcanic sandstone. TEM observations clearly show processes of graphitic mineralization from low-crystallinity to well-crystallized graphite. However, X-ray photoelectron spectrochemical analyses (micro-ESCA) indicate that the green marine clays contain high C (ls) of microbial origin, and COO, C- O, C-C and graphite structures. Fourier transform IR spectra of the green spherules show peaks between glauconite and celadonite. XRD data show the presence of smectite and 1.03-1.22 nm mica-clay minerals with abundant zeolites, which are hydrothermal alteration products. The results suggest that fossil remnants of graphite mineralized organisms, in particular filamentous bacteria, might play an important role in the formation of green marine clays.
Year of Publication: 1992
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 07 Marine Geology and Oceanography; Bacteria; Basins; Biochemical sedimentation; Biogenic processes; Bonin Islands; Clastic sediments; Clay; Clay minerals; Deep-sea environment; Fore-arc basins; Framework silicates; Graphite; Graphitization; Hydrothermal alteration; Infrared spectra; Izu-Bonin Arc; Leg 126; Marine environment; Marine sediments; Metasomatism; Microorganisms; Native elements; North Pacific; Northwest Pacific; Ocean Drilling Program; Organic compounds; Organic materials; Pacific Ocean; Plantae; Sedimentation; Sediments; Sheet silicates; Silicates; Smectite; Spectra; TEM data; Thallophytes; Volcaniclastics; West Pacific; West Pacific Ocean Islands; X-ray diffraction data; X-ray spectra; Zeolite group
Coordinates: N305457 N322359 E1405317 E1395039
Record ID: 1993002175
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom