Niino, Akiko; Maeda, Jinichiro; Yamasaki, Toru; Takeda, Fumiaki (2009): Ni-Fe alloy possibly associated with reduced magmatic fluids in lower-crustal gabbro, IODP Hole U1309D, Atlantis Massif, Mid-Atlantic Ridge. Mineralogical Society of Japan and the Japanese Association of Mineralogists, Petrologists and Economic Geologists, Sendai, Japan, Journal of Mineralogical and Petrological Sciences, 104 (5), 290-295, georefid:2010-063968

A Ni-Fe alloy (Ni (sub 3.8) Fe (sub 0.1) Co (sub 0.1) ) was found in olivine-poor gabbro recovered from the Integrated Ocean Drilling Program (IODP) Hole U1309D, Atlantis Massif, 30 degrees N on the Mid-Atlantic Ridge. Ni-Fe alloys are one of the unique minerals formed during serpentinization; however, our finding establishes that Ni-Fe alloys are also formed in the gabbroic crust possibly associated with extremely reduced magmatic fluids. The occurrence of the Ni-Fe alloy suggests that oceanic lower-crustal gabbros as well as serpentinites may be potential reservoirs of abiogenic CH (sub 4) .
West: -42.0700 East: -42.0600 North: 30.1100 South: 30.1000
Expedition: 304
Site: 304-U1309
Expedition: 305
Site: 305-U1309
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