First investigations of massive ferromanganese crusts in the NE Atlantic in comparison with hydrogenetic pacific occurrences
作者： Andrea Koschinsky , Marc Van Gerven , Peter Halbach
DOI: 10.1080/10641199509388294
关键词: Ferromanganese 、 Sedimentary rock 、 Terrigenous sediment 、 Geochemistry 、 Subtropics 、 Mineralogy 、 Hydrothermal circulation 、 Geology 、 Crust 、 Seamount 、 Hydrography
摘要: Ferromanganese crusts comparable with central Pacific occurrences respect to thickness and extension have been discovered at the Tropic Seamount in subtropical NE Atlantic. A comparison typical hydrogenetic from a seamount revealed lower concentration of Mn phase Mn, Co, Ni, Zn, Cu but strongly increased terrigenous input Fe, Pb, Al, Si Atlantic crusts. Growth rates are compared crusts, crust ages average 10 My. The old phosphatized generation that started grow about 20 My ago on seamounts is not pronounced Seamount. hydrographic morphological parameters for hyrogenetic growth also found Seamount, which implies developed according model. There no indications hydrothermal influence.
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