Isotopic aspects of thermal and burial diagenesis of sandstones at DSDP Site 445, Daito Ridge, Northwest Pacific Ocean

Author(s): Lee, Yong Il
Author Affiliation(s): Primary:
Seoul Natl. Univ., Coll. Nat. Sci., Dep. Geol. Sci., Seoul, South Korea
Volume Title: Use of stable isotopes in solving depositional and diagenetic problems
Volume Author(s): Fuare, G., editor
Source: Chemical Geology; Isotope Geoscience Section, 65(2), p.95-102; First annual midyear meeting of the Society of Economic Paleontologists and Mineralogists, San Jose, CA, Aug. 10-13, 1984, edited by G. Fuare. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0168-9622
Note: In English. 31 refs.; illus. incl. 2 tables, sketch map
Summary: Oxygen isotope composition of zeolite pore-fill cements in andesitic volcaniclastic sandstones recovered from the DSDP site ranges from +30.1 to +17.8per mille (SMOW) downhole. The change is controlled by large heat flow from the basement, which caused early diagenetic emplacements of zeolites during early basement rifting. The delta 18O values of late calcite cements range from +25.1 to +27.4per mille (SMOW); their petrographic relation and inferred T of formation suggest that calcite cements were formed during late stages of diagenesis. Isotopic composition in these sandstones agrees with mineral paragenesis determined microscopically.
Year of Publication: 1987
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; 07 Marine Geology and Oceanography; Burial diagenesis; C-13/C-12; Calcite; Carbon; Carbonates; Cement; Clastic rocks; DSDP Site 445; Daito Ridge; Deep Sea Drilling Project; Diagenesis; Framework silicates; Geochemistry; IPOD; Isotopes; Leg 58; Materials; North Pacific; Northwest Pacific; O-18/O-16; Oxygen; Pacific Ocean; Philippine Sea; Sandstone; Sedimentary rocks; Silicates; Stable isotopes; Thermal alteration; Thermal diagenesis; West Pacific; Zeolite group
Coordinates: N253121 N253122 E1331230 E1331229
Record ID: 1987067110
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom