Noble metals and associated trace elements in sulfides from the active TAG mound, ODP Site 158-957


Autoria(s): Mozgova, NN; Borodaev, YuS; Stepanova, Tamara V; Cherkashov, Georgy A; Zhirnov, EA
Cobertura

MEDIAN LATITUDE: 26.136974 * MEDIAN LONGITUDE: -44.825984 * SOUTH-BOUND LATITUDE: 26.136600 * WEST-BOUND LONGITUDE: -44.826400 * NORTH-BOUND LATITUDE: 26.137200 * EAST-BOUND LONGITUDE: -44.825800 * DATE/TIME START: 1994-10-04T00:00:00 * DATE/TIME END: 1994-11-16T00:00:00

Data(s)

20/06/2000

Resumo

Primary sulfides from cores of ODP Holes 158-957M, 158-957C, and 158-957H on the active TAG hydrothermal mound (Mid-Atlantic Ridge, 26°08'N) have been studied for concentrations of several chemical elements. Based on 262 microprobe analyses it has been found that the sulfides have extremely heterogeneous distribution of noble metals (Au, Ag, Pt, and Pd) and several associated elements (Hg, Co, and Se). Noble metals are arranged in the following order in terms of decreasing abundance, i.e. concentration level above detection limits (the number of analyses containing a specific element is given in parentheses): Au (65), Ag (46), Pt (21), and Pd (traces). The associated trace elements have the following series: Co (202), Hg (132), and Se (49). The main carriers of "invisible" portion of the noble metals are represented by pyrite (Au, Hg), marcasite and pyrite (Ag, Co), sphalerite and chalcopyrite (Pt, Pd), and chalcopyrite (Se). Noble metal distribution in sulfides reveals a lateral zonality: maximal concentrations and abundance of Au in chalcopyrite (or Pt and Ag in chalcopyrite and pyrite) increase from the periphery (Hole 957H) to the center (holes 957C and 957M) of the hydrothermal mound, while Au distribution in pyrite displays a reversed pattern. Co concentration increases with depth. Vertical zonality in distribution of the elements mentioned above and their response to evolution of ore genesis are under discussion in the paper.

Formato

application/zip, 3 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.784664

doi:10.1594/PANGAEA.784664

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Mozgova, NN; Borodaev, YuS; Stepanova, Tamara V; Cherkashov, Georgy A; Zhirnov, EA (2000): Noble metals in sulfide assemblages from deep sectors of the active TAG mound (Mid-Atlantic Ridge, 26°08'N). Translated from Litologiya I Poleznye Iskopaemye, 2000, 1, 5-24, Lithology and Mineral Resources, 35(1), 1-18

Palavras-Chave #158-957; 158-957C; 158-957H; 158-957M; Ag; Archive of Ocean Data; ARCOD; Au; Calculated; Co; Cobalt; COMPCORE; Composite Core; Depth; DEPTH, sediment/rock; detected Ag; detected Au; detected Hg; detected Pd; detected Pt; detected Se; detection limit; DRILL; Drilling/drill rig; Event; Gold; Hg; Joides Resolution; Label; Leg158; max; Mercury; Microprobe; min; Minerals; NOBS; North Atlantic Ocean; Number of observations; Ocean Drilling Program; ODP; of analyses detected Ag (incuding traces) in samples analyzed; of analyses detected Au (incuding traces) in samples analyzed; of analyses detected Hg (incuding traces) in samples analyzed; of analyses detected Pd (incuding traces) in samples analyzed; of analyses detected Pt (incuding traces) in samples analyzed; of analyses detected Se (incuding traces) in samples analyzed; of significant Ag concentrations, in samples analyzed; of significant Au concentrations, in samples analyzed; of significant Co concentrations, in samples analyzed; of significant Hg concentrations, in samples analyzed; of significant Pt concentrations, in samples analyzed; of significant Se concentrations, in samples analyzed; Palladium; Pd; Perc; Percentage; Platinum; Pt; Sample code/label; Sample type; Samp type; Selenium; Silver; total; with significant Ag concentrations; with significant Au concentrations; with significant Co concentrations; with significant Hg concentrations; with significant Pt concentrations; with significant Se concentrations
Tipo

Dataset