The geochemistry of DSDP sediments from Site 223, Indian Ocean

Online Access: Get full text
doi: 10.1016/0009-2541(82)90085-7
Author(s): Papavassiliou, C. T.; Cosgrove, M. E.
Author Affiliation(s): Primary:
Univ. Athens, Lab. Mineral. Petrol., Athens, Greece
Univ. Southampton, United Kingdom
Volume Title: Chemical Geology
Source: Chemical Geology, 37(3-4), p.299-315. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541 CODEN: CHGEAD
Note: In English. 2 p. refs.; illus. incl. 8 tables
Summary: Major- and trace-element analyses are presented of 41 sediment samples from DSDP Site 223 borehole cores. A marked change in chemical and mineralogical character is shown at the end of the Early Miocene epoch which relates to tectonic events and associated changes in the sedimentary regime. Enrichment in the contents of such elements as Mg, Cr and Ni, compared with average values for fine-grained sediments, occurs throughout the sequence and is particularly marked in the upper group of samples. A basic-ultrabasic provenance is suggested: the Oman ophiolites. Leaching with a combined acid-reducing agent indicated typical lithogenous character-ordering for the elements and emphasized the enrichment of Mg, Cr, Ni, Li, Cu, Zn, Pb, Fe, and Ti over values for near-shore muds and terrigenous material. Factor analysis of the bulk chemical data identifies the main lithogenous and biogenous components, subdividing the latter. It separates the upper and lower group of chemically dissimilar sediments and delineates a Mn-hydroxide phase. It also shows the essentially independent roles of Na, Ba and P.
Year of Publication: 1982
Research Program: DSDP Deep Sea Drilling Project
Key Words: 02 Geochemistry; Carbonate rocks; Cenozoic; Chalk; Clastic rocks; Clastic sediments; Claystone; DSDP Site 223; Deep Sea Drilling Project; Eocene; Factor analysis; Geochemistry; Holocene; Indian Ocean; Leg 23; Major elements; Marine sediments; Miocene; Neogene; Ooze; Owen Ridge; Paleocene; Paleogene; Pleistocene; Pliocene; Quaternary; Sedimentary petrology; Sedimentary rocks; Sedimentation rates; Sediments; Siltstone; Statistical analysis; Stratigraphy; Tertiary; Trace elements; Upper Paleocene
Coordinates: N184458 N184459 E0600747 E0600746
Record ID: 1984007444
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique