Deep-Sea Authigenic Calcite and Dolomite

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Science  29 Jul 1966:
Vol. 153, Issue 3735, pp. 534-537
DOI: 10.1126/science.153.3735.534


Crystals of calcite and, in one case, of dolomite up to 90 µm in size are dispersed in pelagic red clay at several sites on the floor of the South Pacific Ocean. They were analyzed by microscopic, x-ray diffraction, electron x-ray microprobe, and oxygen isotopic techniques. These carbonates are authigenic and were probably precipitated from hydrothermal solutions connected with deep-sea volcanic activity.