Dense mineral distribution in the northwestern Arabian Sea: insights into sediment provenance and paleoclimate

The dense minerals (often called heavy minerals, density of more than 2.89 g/cm 3 ) of northwestern Arabian Sea are studied to understand their provenance and implications to paleoclimates during the last 150 kyrs. Two cores: 723A (latitude 18°03.079′N and longitude 57°36.561′E; 808 m water depth) a...

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Bibliographic Details
Published in:Arabian journal of geosciences 2023-11, Vol.16 (11), Article 611
Main Authors: Dev, Vikas, Sahu, Anil Kumar, Rai, Ajai Kumar, Das, Siddhartha Sankar
Format: Article
Language:English
Subjects:
Abundance
Amphibolites
Apatite
Biotite
Carbonates
Chlorite
Earth and Environmental Science
Earth science
Earth Sciences
Fluorite
Garnet
Heavy minerals
Igneous rocks
Ilmenite
Kyanite
Longitude
Magnetic permeability
Magnetic susceptibility
Magnetite
Metamorphic rocks
Mineral assemblages
Minerals
Original Paper
Oxygen isotopes
Paleoclimate
Roundness
Schists
Sediment samplers
Sediment samples
Sedimentary rocks
Sediments
Sillimanite
Tourmaline
Transportation
Water depth
Weathering
Zircon
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Summary:The dense minerals (often called heavy minerals, density of more than 2.89 g/cm 3 ) of northwestern Arabian Sea are studied to understand their provenance and implications to paleoclimates during the last 150 kyrs. Two cores: 723A (latitude 18°03.079′N and longitude 57°36.561′E; 808 m water depth) and 722B (latitude16°37.312′N and longitude 59°47.755′E; water depth 2028 m) away from the eastern coastline of Arabian Peninsula are taken. The total carbonate, acid insoluble residue, volume magnetic susceptibility and oxygen isotope data are used to correlate paleoenvironmental changes. A few elemental chemistry of core 722B is also used to understand source rock weathering characteristics. Ilmenite and magnetite are occurring as dominant opaque minerals in both the core sites. The shallower site 723A predominantly consists of hornblende, apatite, fluorite, epidote and chlorite; whereas, the deeper site 722B consists of epidote, fluorite, biotite, apatite and staurolite. The other important heavy minerals found in core sites are tourmaline, rutile, garnet, zircon, chloritoid, kyanite, sillimanite and pyroxenes. Low ZTR indices (
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-023-11728-z