Locality type: | Pit |
Classification |
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Species: | Muscovite var: Gilbertite |
Formula: | KAl2(AlSi3O10)(OH)2 |
Confirmation |
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Validity: | Believed Valid |
Data |
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Mineral Data: | Click here to view Gilbertite data |
Locality Data: | Click here to view Trethosa China Clay Pit, Treviscoe, St Stephen-in-Brannel, Cornwall, England, UK |
Data Identifiers |
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Mindat Occurrence Record ID: | 785892 |
Long-form Identifier: | 1:3:785892:5 |
GUID (UUID V4): | 00b14b5c-4577-48c1-a48c-f5d0b427c82c |
Nearest other occurrences of Gilbertite |
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1.8km (1.1 miles) | ⓘStenna Gwyn Mine (Stennagwyn Mine), Foxhole, St Stephen-in-Brannel, Cornwall, England, UK |
6.2km (3.9 miles) | ⓘGunheath China Clay Pit, Stenalees, Treverbyn, Cornwall, England, UK |
7.6km (4.7 miles) | ⓘWest Carclaze Pit, Carludon, Treverbyn, Cornwall, England, UK |
8.9km (5.5 miles) | ⓘCriggan Mine (Criggan Consols), Criggan, Roche, Cornwall, England, UK |
12.1km (7.5 miles) | ⓘColcerrow Quarry (Gready Quarry), Lanlivery, Cornwall, England, UK |
27.4km (17.0 miles) | ⓘLower Kergilliack Quarry, Budock, Cornwall, England, UK |
29.8km (18.5 miles) | ⓘHalvosso Quarry (Halvasso Quarry; Kessel Downs Quarry), Mabe, Cornwall, England, UK |
31.8km (19.8 miles) | ⓘBalmynheer Mine, Porkellis, Wendron, Cornwall, England, UK |
33.7km (21.0 miles) | ⓘFatwork Mine, East Wheal Lovell (incl. Tregonebris Mine), Trewennack, Wendron, Cornwall, England, UK |
34.7km (21.6 miles) | ⓘSouth Wendron Mine (South Wheal Lovell; Lovell Consols), Trewennack, Wendron, Cornwall, England, UK |
References |
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Reference Search (possible matching items) |
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| | Journal (article/letter/editorial) | inclusions in topaz for greisenisation and mineralisation in the Hensbarrow topaz granite, Cornwall, England...inclusions in topaz from greisens in the Hensbarrow topaz granite stock (St. Austell, Cornwall) are used...[(Fe+2,Mn+2)2(Nb,Ta)2W+6O10]. Primary L + V inclusions in topaz show relatively high Th (mainly 300 to >500...(23–30 wt % NaCl equivalent) compared with those in greisen quartz (150–450 °C, 0–50 wt % NaCl equivalent)...greisenisation, mixing with meteoric waters and a decrease in pressure causing intermittent boiling. The presence |
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