Yoshikawa, M. et al. (1993) Rb-Sr isotope systematics in a phlogopite-bearing spinel lherzolite and its implications for age and origin of metasomatism in the Horoman peridotite complex, Hokkaido, Japan, J. Min. Petr. Econ. Geol, 88, 121-130, doi: 10.2465/ganko.88.121. < 20150914105617-117249 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    23.0±1.2 Ma was obtained by Rb-Sr method for a phlogopite-bearing spinel lherzolite from the Horoman peridotite complex in the Hidaka metamorphic belt, Hokkaido, Japan. The age is essentially identical to the oldest ages of the country metamorphic rocks reported so far in the Hidaka metamorphic belt, and may indicate the time of a metasomatic event which occurred in the wedge mantle. This metasomatic event may have occurred during uplift of this mantle fragment under mantle conditions contemporaneously with elevation of the Hidaka metamorphic belt resulting from collision between the Eurasian and North American plates.

  • doi: 10.2465/ganko.88.121
  • modified at 4 h ago
Tixhr 1956956307 thumb 30 cm ue < 20151027090815-367468 >pub
  • physical-form: hand specimen
  • status: (unknown)
  • description: This sample was possibly used for analysis in Yoshikawa et al., 1993
  • modified at 2019-05-28
phlogopite-bearing spinel lherzolite (Yoshikawa et al. 1993) < 20190528091706-121603 >pub
  • place: N42°6′10.0″, E143°2′34.0″ more
  • physical-form: hand specimen
  • status: (unknown)
  • modified at 2019-05-28
name latitude longitude global-id
locality of phlogopite-bearing spinel lherzolite (Yoshikawa et al. 1993) pub 42.1028 N 143.0428 E 20190528100125-168450
name device size global-id
Phlogopite pub TIMS Thermo-Fisher MAT261 4 20190426114903-239901
Cpx (-1mm from phl vein) pub TIMS Thermo-Fisher MAT261 4 20190426114903-683731
Whole rock (-1mm from phl vein) pub TIMS Thermo-Fisher MAT261 4 20190426114903-403127
Cpx (-10 mm from phl vein) pub TIMS Thermo-Fisher MAT261 4 20190426114903-254910
Cpx (-55 mm from phl vein) pub TIMS Thermo-Fisher MAT261 4 20190426114904-406072
Opx (-55 mm from phl vein) pub TIMS Thermo-Fisher MAT261 4 20190426114904-533684
Cpx (+100 mm from phl vein) pub TIMS Thermo-Fisher MAT261 2 20190426114904-685168
name spots global-id
caption ID assembly stone
Table 1. Sr isotopic compositions and concentrations of Rb and Sr of mineral separates and whole rock sample from a spinel lherzolite pub 20190426114448-233505 strontium (Yoshikawa, 1993) 7
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  • name
  • Yoshikawa, M.
  • Nakamura, E.
  • Takahashi, N.