Controls on organic carbon distribution in sediments from the eastern Arabian Sea margin
Abstract
Sediment cores from the upper continental slope of the eastern Arabian Sea have high organic carbon (OC), CaCO sub(3), and sand content at the top. The values decrease with increasing depth in the Holocene and Upper Pleistocene. Topographic highs show highest OC and lower CaCO sub(3) in Holocene clayey sediments and vice versa in the Pleistocene sandy sediments. The OC is immature and marine of a mixture of both marine and terrestrial in the Holocene sediments and is mostly terrestrial and/or reworked marine in the Pleistocene sediments. Productivity is the main controlling factor for the organic carbon enrichment. Texture and reworking also influence the organic carbon variations
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