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Mozgova, N N; Borodaev, YuS; Stepanova, Tamara V; Cherkashov, Georgy A; Zhirnov, E A (2000): Noble metals and associated trace elements in sulfides from the active TAG mound, ODP Site 158-957 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.784664, Supplement to: Mozgova, NN et al. (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

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Abstract:
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.
Project(s):
Archive of Ocean Data (ARCOD)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 26.136894 * 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
Event(s):
158-957 * Latitude: 26.136950 * Longitude: -44.826033 * Date/Time Start: 1994-10-04T00:00:00 * Date/Time End: 1994-11-16T00:00:00 * Elevation: -3643.4 m * Penetration: 635.3 m * Recovery: 55.3 m * Location: South Atlantic Ocean * Campaign: Leg158 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 88 cores; 530.9 m cored; 0 m drilled; 10.4% recovery
158-957C * Latitude: 26.137200 * Longitude: -44.825800 * Date/Time Start: 1994-10-10T10:00:00 * Date/Time End: 1994-10-14T12:45:00 * Elevation: -3548.0 m * Penetration: 49.2 m * Recovery: 21.69 m * Location: South Atlantic Ocean * Campaign: Leg158 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 49.2 m cored; 0 m drilled; 44.1 % recovery
158-957H * Latitude: 26.136600 * Longitude: -44.825800 * Date/Time Start: 1994-10-27T11:00:00 * Date/Time End: 1994-10-30T13:15:00 * Elevation: -3655.0 m * Penetration: 54.5 m * Recovery: 5.01 m * Location: South Atlantic Ocean * Campaign: Leg158 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 45.8 m cored; 0 m drilled; 10.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Mozgova, NN; Borodaev, YS; Stepanova, TV et al. (2000): (Table 1) Concentrations and occurrence frequency of noble metals and associated trace elements in sulfide minerals from the active TAG mound, ODP Site 158-957. https://doi.org/10.1594/PANGAEA.784658
  2. Mozgova, NN; Borodaev, YS; Stepanova, TV et al. (2000): (Table 2) Comparison of concentrations and occurrence frequency of noble metals and associated trace elements in sulfide minerals from ODP holes on the active TAG mound. https://doi.org/10.1594/PANGAEA.784661
  3. Mozgova, NN; Borodaev, YS; Stepanova, TV et al. (2000): (Table 3) Variation of maximal gold concentrations in sulfide aggregates vs. hole depth within the TAG hydrothermal mound. https://doi.org/10.1594/PANGAEA.784662