 | | Journal (article/letter/editorial) | | granitic the Tsukuba YOJI * ARAKAWA* Institute of district, and Geological The Rb-Sr The isochron 2... dikes The in Tsukuba gives the district, of Yamanoo Tsukuba-shi, the granitic isochron...granodiorite area, whole which rock Tsukuba, Japan for and rocks age has are mineral of in the...the 60.2•}0.4 a mineral the of ages district, and isochron products isochron Tsukuba Ma age...59.9•}4.0 Ma and respectively. Rb-Sr ages district in are indicating that interval (less than |  | | Report (issue) | | mineral col lector, was born in Kanazawa, Ishikawa Prefecture, on August 30, 1874. Soon after his graduation...a mining engineer at the Arakawa Mine, Akita Prefecture. In 1909, he was promoted to Director of the...of the Director of the Yoshioka Mine, Okayama Prefecture, for about seven years altogether. He returned...technology in the first half of this century in Japan. He retired from the Advisory Board of the Mitsu...such volumes as " Beiträge zur Mineralogie von. Japan ", Neue Folge I and II (T. Ito, 1937), " Japanese |  | | Journal (issue) | | belonging rather to the a q u a m a r i n e variety of beryl than to emerald. Despite these anomalies, we were...cleavage. T h e euclase found in the rich mineral district around O u r o Prêto has different colours that...easy, because the R . I . of a q u a m a r i n e (beryl) is 1-575-1-582 and the R . I . of euclase is 1-651-1-678...1-651-1-678. Also the S.G. of aquamarine (beryl) 2-70 is different from the S.G. 3-08 or 3-10 of euclase...in Spain. 332 GEMMOLOGICAL ASSOCIATION OF ALL JAPAN In September the Association received a visit of |  | | Journal (article/letter/editorial) | | crystallization fractionation during the ascending and beryl-bearing pegmatite [7,9,61]. However,and the ages...garnet-, tourmaline-, and muscovite-bearing gra and beryl-bearing pegmatite [7,9,61]. However, the ages of...Huang, Y.; Cao, H.W.; Xia, X.B. The early Oligocene beryl-bearing pegmatite in the Cuonadong dome, southern...areas, garnets northeastern from the Ishikawa Japan and Yamanoo. Geochem. J. 1997, 31, 105–118. [CrossRef] |  | | Report (issue) | | (Christensen et al., 1994). Tenkawa, Nara Prefecture, Japan. These layers create interference patterns-a...uranium-vanadium deposit of the Sandy Mine in the Laguna District, New Mexico, is the type locality for goldmanite...metamorphic manganese deposit at Yamoto, Amami Oshima, Japan. Goldmanite is also known from the Coa-an Noz wolframite...locality is a skarn at the Fuka Mine in Okayama Prefecture, Japan. It occurs in association with calcite, vesuvianite...Above: Hydrogrossular from Bicchu-cho, Fukoa Prefecture, Japan (pink) and Rotenstein, Zillertal, Austria |
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Yamanoo, Makabe-machi, Makabe District, Ibaraki Prefecture, Japan