Towery manganocalcite from Hosokura mine, Miyagi Prefecture

Omori, Keiichi; Yamaoka, Kazuo

doi:10.2465/ganko1941.38.81

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Manganese-calcite1

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1984

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“…Manganese-calcite (manganocalcite) has been described in two reports (Levison, 1916;Omori and Yamaoka, 1954) as having a "columnar" or "towery" structure. No illustrations were given by Levison for his "columnar manganocalcite" Manganese-calcite has not been found in other Yellowstone drill cores, although both manganese oxide and travertine are identified in the upper part of Y-2 drill core and manganese oxide and travertine occur in surficial deposits of the Firehole Lake area (in the vicinity of Y-2; see fig.…”

Section: Manganese-calcitementioning

confidence: 99%

Hydrothermal alteration in research drill hole Y-6, Upper Firehole River, Yellowstone National Park, Wyoming

Bargar¹,

Beeson²

1984

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Bl Introduction ___________________________ 1 Acknowledgments _____________________ 2 Stratigraphy __________________________ 2 Glacial sediments _____________________ 2 Volcanic rocks _______________________ 2 Hydrothermal alteration ____________________ 4 Silica minerals ________________________ 4 «-and j8-cristobalite __________________ 4 Quartz and chalcedony _______________ 5 Potassium feldspar __________________ 6 Zeolite minerals ______________________ 7 Heulandite-group minerals ____________ 7

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Section: Manganese-calcitementioning

confidence: 99%