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Miller, D Jay (2007): Composition of sulfide minerals of ODP Hole 209-1268A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.776392, Supplement to: Miller, DJ (2007): Sulfide mineralization at Site 1268, Mid-Atlantic Ridge, Ocean Drilling Program Leg 209. In: Kelemen, PB; Kikawa, E; Miller; DJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 209, 1-18, https://doi.org/10.2973/odp.proc.sr.209.004.2007

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Abstract:
This paper presents sulfide mineral occurrence, abundance, and composition in samples from hydrothermally altered peridotite and gabbro recovered during Ocean Drilling Program (ODP) Leg 209 from south of the 15°20'N Fracture Zone on the Mid-Atlantic Ridge at Site 1268. Most of the sulfide minerals occur in veins and halos around veins in serpentinized peridotite. The only sulfide phases reported that occur in proximity to gabbro are those associated with a mafic intrusion into serpentinized peridotite. Sulfide mineral species change predictably downsection but are perturbed coincident with a breccia interpreted to be generated by intrusion of a gabbroic magma. The general downhole trend suggests sulfide mineral precipitation in conditions with decreasing sulfur and oxygen fugacity. Sulfide minerals that indicate precipitation at relatively higher sulfur and oxygen fugacity occur in the central core of the intrusion breccia. Sphalerite makes a fleeting appearance in the sulfide mineral assemblage in samples from the lower part of the intrusion breccia. Strongly contrasting pyrite compositions suggest at least two episodes of pyrite precipitation, but there is no clear morphological distinction between phases. Heazelwoodite, tentatively identified in shipboard examinations, could not be confirmed in this study.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 14.845910 * Longitude: -45.077350
Date/Time Start: 2003-05-22T05:45:00 * Date/Time End: 2003-05-26T19:30:00
Event(s):
209-1268A * Latitude: 14.845910 * Longitude: -45.077350 * Date/Time Start: 2003-05-22T05:45:00 * Date/Time End: 2003-05-26T19:30:00 * Elevation: -3007.0 m * Penetration: 147.6 m * Recovery: 78.69 m * Location: South Atlantic Ocean * Campaign: Leg209 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 147.6 m cored; 0 m drilled; 53.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Miller, DJ (2007): (Table T1) Sulfide mineral occurrences in ODP Hole 209-1268A. https://doi.org/10.1594/PANGAEA.776387
  2. Miller, DJ (2007): (Table T2) Compositions of sulfide phases in ODP Hole 209-1268A. https://doi.org/10.1594/PANGAEA.776388