The distribution of organic pigments in marine manganese nodules from the Northwest Indian Ocean

Details The distribution of organic pigments in marine manganese nodules from the Northwest Indian Ocean The distribution of organic pigments in marine manganese nodules from the Northwest Indian Ocean

Aug 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971gecoa..35..845g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 35, Issue 8, pp.845-851

Mathematics

Logic

2

Scientific paper

Two classes of organic pigments were detected in samples of manganese nodules. The first comprised chlorin pigments with fluorescence excitation-emission maxima at 414 and 668 nm; the second, non-fluorescent yellow pigments, possibly organic sulphur compounds, with major and minor absorption maxima at 424 and 399 nm, respectively. The total content of chlorin pigments was estimated to be about 0.1 ng/g which is five orders of magnitude lower than average values for shallow marine sediments. The data gave, along with those for low carbon contents commonly cited in the past, no evidence to support the biological origin of manganese nodules.

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