Clay mineral diagenesis in parts of the western Indian Ocean

Author(s): Dilli, Kailas; Rao, C. N.
Author Affiliation(s): Primary:
Ind. Inst. Technol., Dep. Geol. and Geophys., Kharagpur, West Bengal, India
Volume Title: Journal of the Geological Society of India
Source: Journal of the Geological Society of India, 25(1), p.56-62. Publisher: Geological Society of India, Bangalore, India. ISSN: 0016-7622 CODEN: JGSIAJ
Note: In English. 19 refs.; illus. incl. 17 analyses, 2 tables
Summary: Drillcore samples from DSDP sites 241 and 250 in the Somali and Mozambique Basins yield a clay-mineral suite dominated by montmorillonite. The apparent breakdown of kaolinite and illite and the adsorption of K by the clay minerals results in montmorillonite-illite mixed-layers being the only phase present at depths >approx 800 m; this suggests that diagenesis is initiated at much shallower depths than previously believed.
Year of Publication: 1984
Research Program: DSDP Deep Sea Drilling Project
Key Words: 07 Marine Geology and Oceanography; Adsorption; Alkali metals; Areal studies; Burial diagenesis; Chlorite; Chlorite group; Clay mineralogy; Clay minerals; DSDP Site 241; DSDP Site 250; Deep Sea Drilling Project; Depth; Diagenesis; Geochemistry; Illite; Indian Ocean; Kaolinite; Leg 25; Leg 26; Marine sediments; Metals; Mixed-layer minerals; Montmorillonite; Mozambique Basin; Oceanography; Potassium; Processes; Sediments; Sheet silicates; Silicates; Somali Basin; Western Indian Ocean
Coordinates: S022215 S022214 E0444047 E0444046
S332744 S332744 E0392209 E0392209
Record ID: 1984052256
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom