 | | Report (issue) | | Group: Ilvaite group. Polymorphism & Series: Forms a continuous series with ilvaite. Occurrence: From...rhodochrosite, manganoan calcite and chlorite, andradite, sphalerite, galena, quartz, magnetite. Distribution:...Mountains, Bulgaria. Name: As the Mn-analogue of ilvaite. Type Material: Geological Institute, Bulgarian...CaFe2+Fe3+(Mn,Fe2+)(Si2O7)O(OH), a new mineral of the ilvaite group from Pb-Zn skarn deposits in the Rhodope |  | | Journal (article/letter/editorial) | | Geology Vol. 97, 2002, pp. 1119–1126 FIRST OCCURRENCE OF ILVAITE IN A GOLD SKARN DEPOSIT MARTA B. FRANCHINI...Abstract Ilvaite occurs in the Fortitude Au skarn deposit, Nevada, the first reported occurrence in a Au...Au skarn deposit. Ilvaite is a mixed-valence calcium and iron silicate known previously as a relatively...some Zn(Pb), Fe, and Sn skarns. At Fortitude, ilvaite is present as resinous, black grains with quartz...show that the ilvaite from the Fortitude Au-skarn is similar in composition to ilvaite from Fe skarns |  | | Journal (issue) | | ........43 by Henry A. Truebe Morphology and Occurrence of Bolivian Cassiterite........................logy, the genesis of twinned crystals, and the occurrence and genesis of crystals of varied and unusual...the island, at the head of Hetta Inlet, a narrow fjord which stretches some 25 km to Cordova Bay. Sixty-five...limestones and schists to form skarns rich in andradite-grossular garnet (Ca3(Fe,Al)2Si30 i 2), with magnetite...green zones. Table 1 gives microprobe analyses of andradite from a small cut above the main pit of the Jumbo |  | | Journal (issue) | | ................252 llvaite, a New Colorado Occurrence by Henry A. Truebe.............................of similar color. This eventually leads into a complex mathematical concept known among topologists as...from the Dunton Gem mine, Newry, Maine: a second occurrence” (vol. 9, p. 99-101), the entry in the first...thus far recovered (Fig. 6, 7). Such a large occurrence of almost universally twinned calcite is unprecedented...hair-like crystals, etc., as well as its ubiquitous occurrence in most massive sulfide deposits. Good crystals |
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Ilvaite occurrence, Kangerluarsuk Fjord, Ilímaussaq complex, Kujalleq, Greenland