10.1594/PANGAEA.761475
Lapukhov, A S
A S
Lapukhov
Simonov, Vladimir A
Vladimir A
Simonov
Pavlova, L K
L K
Pavlova
Precious metals and volatiles in rocks of the Mid-Atlantic Ridge near 15°20'N
PANGAEA
1999
Dredge
ANS15
Antares-9
Akademik Nikolaj Strakhov
Antares
Archive of Ocean Data (ARCOD)
en
Supplementary Publication Series of Datasets
2 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Distribution patterns of gold, platinum group metals (PGE), and volatile components are studied in the main rock types of the Mid-Atlantic Ridge lithosphere (ultrabasites, gabbro, and basalts) from the transform fracture zone at 15°20'N. It is ascertained that PGE content depends on the reduction degree of fluids, on rock types, and on their formation conditions. It is noted that concentrations of refractory elements (Os, Ir, Rh) decrease, while those of fusible elements (Pt, Pd, Au) increase with depth. The chondrite type of distribution is only noted in the ultrabasite rocks. Increase in water and CO2 contents and in oxidation degree of fluids occurs with transition from basalts to ultrabasites, as well as from normal magmatic systems to fluid-enriched anomalous systems.
Supplement to: Lapukhov, A S; Simonov, Vladimir A; Pavlova, L K (1999): Noble metals in the bedrocks from the Mid-Atlantic Ridge (15°20'N fracture zone). Translated from Okeanologiya, 1999, 39(5), 787-796, Oceanology, 39(5), 719-727
-46.8465
-44.7598
14.7
15.8603
Cape Verde Fault Zone
Central Atlantic