北海道, 幌満かんらん岩体中の硫化鉱物 [in Japanese] Sulfide minerals from the Horoman peridotite, Hokkaido, Japan [in Japanese]
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Ni-bearing minerals such as pentlandite, heazlewoodite, unknown sulfide minerals X, Y and Z are found in the Horoman peridotite, Hokkaido, Japan. Cu-rich mineral of talnakhite, bornite and native copper also occurs associating with Ni-bearing minerals. Pentlandite has the compositional range from 4.276 to 5.238 in atomic ratio of Fe (total atoms=17) changing coexisting minerals. Unknown sulfide mineral X has composition with Cu: 0.010∼0.144, Fe: 5.573∼6.044: Ni: 2.800∼3.392, Co: 0.047∼0.109, S: 7.884∼8.109 in atomic ratio (total atoms=17) and its ideal formula is (Fe, Cu)<sub>6</sub>Ni<sub>3</sub>S<sub>8</sub>. The compositional range of unknown sulfide mineral Y is Cu: 0.573∼1.003, Fe: 5.783∼6.154: Ni: 1.875∼2.392, Co: 0.012∼0.036, S: 7.953∼8.099 in atomic ratio (total atoms=17), and most copper rich end corresponds to CuFe<sub>6</sub>Ni<sub>2</sub>S<sub>8</sub>. Unknown sulfide mineral Z has ideal formula of Cu<sub>2</sub>Fe<sub>5</sub>Ni<sub>2</sub>S<sub>8</sub>. Pentlandite and unknown sulfide mineral X occur as primary minerals in the peridotite. Talnakhite and bornite are also found and has their ideal compositions.
- Journal of Mineralogical and Petrological Sciences
Journal of Mineralogical and Petrological Sciences 93(10), 369-379, 1998-10-05
Japan Association of Mineralogical Sciences