 | | Journal (article/letter/editorial) | | Li–Cs–Ta (LCT) Pegmatite Exploration Benedikt M. Steiner Camborne School of Mines, University of Exeter...A-type granites originating from the melting of lower continental crust and mantle, whilst LCT pegmatites...rafts of biotite schist in the weathered pegmatite illustrating Note the rafts of biotite schist in the...deposits, such as King Mountain (US), Wolfsberg (Austria) and Kaustinen (Finland). However, only a minor...minor fraction of pegmatites in any given district are enriched in these elements and minerals, whilst the |  | | Journal (issue) | | of Emerald Mining in the Habachtal Deposit of Austria, Part II Karl Schmetzer The finale of a two-part...Vietnam • Davemaoite inclusion in diamond from the lower mantle • Natural near-colorless type IIb diamond...discovery of davemaoite in a diamond from the earth’s lower mantle. This issue also includes the debut of an...porphyry v v v v v v Lamprophyre Greisen breccia Schist breccia Granite Klingenthal 0 12°30'E 100 m...Baumann and Gorny, 1964). This is known because a lower level of the Schneckenstein breccia was drilled |  | Melcher, F., Prochaska, W., Raith, J., Thalhammer, O., Mali, H., AlHakim, A., Altenberger, F., Berger, M., Grafinger, S., Hampl, F., Lamprecht, C., Layr, K., Pupp, M., Steiner, T. (2018) Mineral deposits of Lapland: excursion guide of the Montanuniversität Leoben. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 164. | Journal (article/letter/editorial) | | Lamprecht, Katrin Layr, Magdalena Pupp, Timotheus Steiner Department of Applied Geosciences and Geophysics...be derived from the roof of the magma chamber. lower amphibolite facies. Stop 2 65.59502°N 26.48201°E...preserved pillows which were only metamorphosed in the lower greenschist Figure 4: Pillow basalt of the Archean...layered intrusion within the Portimo metallogenic district (PGR, Cr, Ni) that is divided into the Tornio...The Svecokarelian orogeny (1.9-1.8 Ga) led to a lower-amphibolite facies metamorphism. Today there is |  | | Report (issue) | | gneisses__-_________. Kyanite schist and gneiss _____ ______________________ Sillimanite schist and gneiss_________________...________________ Virginia - __ -__ _ ___________ Farmville district, Buckingham, Prince Edward, and Charlotte Counties..._ Stratigraphy Biotite gneiss _____________________________________ Muscovite schist and gneiss. Kyanite...Kyanite schist _____ Kyanite quartzite ___________ ______________________ Hornblende gneiss and schist ___________...deposits Continued Virginia Continued Farmville district, etc. Continued Rock types Continued Other quartzose |  | Rigby, M.J., Basson, I.J., Kramers, J.D., Gräser, P., Mavimbela, P.K. (2011) The structural, metamorphic and temporal evolution of the country rocks surrounding Venetia Mine, Limpopo Belt, South Africa: Evidence for a single palaeoproterozoic tectono-metamorphic event with implications for a tectonic model. Precambrian Research, 186 (1) 51-69 doi:10.1016/j.precamres.2011.01.001 | Journal (article/letter/editorial) | | quartzofeldspathic bands in biotite gneiss and amphibolite. S2 , defined by biotite in biotite schist, gneissic banding...banding in biotite gneiss, long axes of quartzofeldspathic augen, and the long axes of amphibolite lenses/boudins...predominantly at the contacts between biotite gneiss and biotite schist, forming open to closed, upright to...defined predominantly by sillimanite in metapelitic schist, plunge moderately NE to NNE and overprint all...Banded biotite gneiss Biotite gneiss Augen biotite gneiss Biotite schist Convoluted biotite schist garnetiferous |  | | Book | | Morozewicz Graham Schaller Sakurai and Hayashi Steiner Hurlbut KambandOke Walker Galli, Passaglia, Pongiluppi...volcanic ash and larger pyroclastic material on the land surface; in freshwater lakes; shallow marine seas;...different processes depending on whether it fell on the land surface, freshwater lake, or shallow sea; into a...a saline, alkaline lake; or into the ocean. LAND SURFACES Zeolites can form as the result of meteoric...ash or pyroclastic deposits that settled on the land surface, into freshwater lakes, or into a shallow | | | Book | | Morozewicz Graham Schaller Sakurai and Hayashi Steiner Hurlbut KambandOke Walker Galli, Passaglia, Pongiluppi...volcanic ash and larger pyroclastic material on the land surface; in freshwater lakes; shallow marine seas;...different processes depending on whether it fell on the land surface, freshwater lake, or shallow sea; into a...a saline, alkaline lake; or into the ocean. LAND SURFACES Zeolites can form as the result of meteoric...ash or pyroclastic deposits that settled on the land surface, into freshwater lakes, or into a shallow |  | | Journal (article/letter/editorial) | | minerals such as monazite will yield an apparently lower age than the true garnet age. However, this study...as monazite or allanite, therefore, would be to lower the SmrNd ratio of a ‘‘garnet’’ separate to such...comes from an upper-amphibolite facies pelitic schist. The garnet in the sample grew over a lithological...lithological boundary between a quartz vein and a biotite-rich schist. Only a small portion of the garnet rim,... shown in Fig. 3a, grew in the biotite schist and 261 is of gem quality with only a few zircon inclusions |  | | Journal (issue) | | and a History of Emerald Mining in Habachtal, Austria Duncan Pay FEATURE ARTICLES p. 300 292 Blue...of Emerald Mining in the Habachtal Deposit of Austria, Part I p. 347 Karl Schmetzer Contributes to...and a History of Emerald Mining in Habachtal, Austria Welcome to the Winter 2021 issue of Gems & Gemology...Subcontinent, and China. From 200 BCE to 800 CE, the land was controlled by a group of city-states, often...and Kabaing. The large secondary deposits in the lower parts of the valleys once held 296 BLUE SAPPHIRES |  | | Journal (issue) | | P. Cassedanne & L. Barreto The Messina mining district, South A frica .................................P inzgau, A ustria. From th e collection of A. Steiner; p h o to by Rainer Bode. Copyright 1991 © by...the Au-Cu deposit at Waschgang, Upper Carinthia, Austria, associated with chalcopyrite, gold, tetradymite...Cretaceous porphyritic granite and an Ordovician (?) schist which was formed from metamorphosed Paleozoic sedimentary...follows an irregular contact between the granite and schist, is 1-2 meters wide, strikes northeast and dips |  | | Report (issue) | | undeveloped. The Big Hurrah mine, in the Solomon district, produced gold from 1903 to 1907 but has not been...Sliscovich mine, on Manila Creek, in the Nome district, but these were more in the nature of samples...rock in this vicinity is chlorite and sericite schist, with considerable graphitic slate and some thin...another and lie conformably with the cleavage of the schist, striking N. 40° E. and dipping 50° SE. The shear...may be entirely the red, iron-stained, shattered schist; at another it may be dominantly the mineralized |  | | Report (issue) | | Blue Ridge province _____________ _ Spruce Pine district ____________ Madison County and Haywood County...County _____________________ _ Zirconia district ___________ ----Macon, Jackson, and Clay Counties __ ----...monazite from saprolite of: 64. Sillimanite schist and biotite schist exposed in the Shelby quadrangle in Cleveland...Cleveland County, N,C____ 65. Biotite gneiss in Cleveland County, N.C--------------------------------...MONAZITE this group it is most commonly observed in biotite quartz monzonite, two-mica granite, muscovite granite |  | Corcoran, Loretta, Simonetti, Antonio, Spano, Tyler L., Lewis, Stefanie R., Dorais, Corinne, Simonetti, Stefanie, Burns, Peter C. (2019) Multivariate Analysis Based on Geochemical, Isotopic, and Mineralogical Compositions of Uranium-Rich Samples. Minerals, 9 (9) 537 doi:10.3390/min9090537 | Journal (article/letter/editorial) | | Precambrian interlayered mica and amphibole gneiss and schist [21]. The Bancroft Minerals 2019, 9, 537 3 of...(Saskatchewan, Canada) is hosted within narrow belts of biotite schist along the margins of granitic pegmatites at...of siliceous dolomite and dolomitic shale of the lower Roan Group of the Neoproterozoic Katanga Supergroup...availability rather than variability (Figure 3A). Lower temperature deposits such as sandstone, sandstone...and (most temperature variability (Figure 3A). Lower temperature deposits such as sandstone, sandstone |  | | Book | | Yugawaralite: Sakurai and Hayashi (1952) Wairakite: Steiner (1955) Bikitaite: Hurlbut (1957) Garronite: Walker...coefficient is 2.00 (if the sharing coefficient is lower, one should consider a mixed 3- and 4-connected...each repeat-unit of the chain (Fig. 0.2B), two lower at 3/8 c from the lowest node (at 0/8c), and two...the same height, or the second is 2/8 c higher or lower. On the hypothesis that only one connection scheme...ordered natrolite from Gulacs Hill, Hungary; its lower part is tetranatrolite (SEM Philips, x 950) Fibrous |  | | Report (volume) | | locality in the Tauern/Austria, an epidote conference was held in Neukirchen/Austria organized by the Austrian...notation of the M positions in the octahedral chains (lower part), with numbers for oxygen (adopted from Dollase...Zone, Tauern Window, 20 Franz & Liebscher Austria; Ray et al. 1986) showed occasional isolated stacking...significant amounts of Fe3+ may be present in M1 at even lower total Fe3+ content (Bonazzi and Menchetti 1995)...Al-Fe3+ solid solutions determined a significant lower disorder than theoretically predicted. In synthetic |  | | Journal (article/letter/editorial) | | metasomatized augen gneiss, biotite-potassium feldspar gneiss and (3) metamorphosed biotite schist, granulite, meta-arkose...southwestern granites (4) hornblende-biotite gneiss; (5) biotite paragneiss and (6) meta-arkose. The rocks...Kisseynewgneiss) and (4) Amisk Group rocks type gneiss (biotite gneiss, talc-silicate (greywackes, pyroclastic...Missi series rooks (arkose and greysyntectonic biotite-microcline granite; wacke) and (6) Amisk Group...to CIT shelf lead values reported by TILTON and STEINER (1966) by using normalization factors. All concentrations |  | | Book | | metamorphosed dolerite dyke swarms. Shear zones in the schist carry minor gold. Upper Sinclair Sequence equivalents...Formation marbles; in the latter case gamet-pyroxene-biotite-vesuvianite skams have developed adjacent to the...occurred 130 million years ago (Milner, 1988). Lower Cretaceous sediments have been intersected offshore...located 2 Tcf of recoverable dry gas (96% methane) in lower Cretaceous aeolian sandstone at a depth of 4.2 km...Geochemistry of Precambrian igneous rocks in the lower Orange River region. 811/1.Precambr. Res. Unit, |  | | Book | | MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for talc since the beginning...beginning of the 20th century, the Trimouns quarry became well known to collectors around 1990 for the...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...vein-dike consists of ilmenite. magnetite, anatase, biotite, microcline and minor fluorapatite (Robinson and...1991). Simdeled, Aust-Agder. Early in 1999, in a quarry near S~ndeled, collectors opened a pocket containing |  | | Journal (article/letter/editorial) | | combining the commodity (lines) shown by numbers plus lower caps with the host rocks or structure (columns)...(continued) Mineral Chemical composition Line Biotite Birnessite Bischofite Bismite Bismuth native Bismuthinite...places. Aggregates, sand and gravel are followed by quarry and dimension stones (Prentice, 1990; Lorenz, 1991)...vapor-derived fluid) of any composition with a density lower than its critical density are involved in the formation...no hypersthene. Lamprophyre mainly composed of biotite or phlogopite and melilite. May also contain olivine | | | Journal (article/letter/editorial) | | combining the commodity (lines) shown by numbers plus lower caps with the host rocks or structure (columns)...(continued) Mineral Chemical composition Line Biotite Birnessite Bischofite Bismite Bismuth native Bismuthinite...places. Aggregates, sand and gravel are followed by quarry and dimension stones (Prentice, 1990; Lorenz, 1991)...vapor-derived fluid) of any composition with a density lower than its critical density are involved in the formation...no hypersthene. Lamprophyre mainly composed of biotite or phlogopite and melilite. May also contain olivine |  | Garihan, John M., Ranson, William A., Muthukrishnan, Suresh, Bridgeman, James L., Goforth, Tom (2012) Geologic Studies of the Inner Piedmont, Brevarrd Zone, and Blue RIdge, South Carolina and North Carolina. Field Trip Guidebook. Carolina Geological Society | Report (issue) | | maintain a mineralogical museum in the Spruce Pine District”. Copies of the resolution were sent to Congressman...21 articles by 27 authors), 1982 (Kaolin Mining District of South Carolina with 8 articles by 10 authors)...Geology of the Piedmont and Coastal Plain near Page- land, SC and Wadesboro, NC Geology of the Blue Ridge...related to the stratigraphy in the kaolin mining district, Geologic Investigations in the Blue Ridge of...1-2 Little Switzerland, NC Spruce Pine Mining District, North Carolina Alex Glover and Kenneth Taylor |  | | Report (issue) | | Wisconsin Oshkosh, Wisconsin 54901 USA Maureen B. Steiner Department of Geology and Geophysics University...Permo-Triassic plutonic rocks (Chs. 2, 9, and 22), and Lower Mesozoic sedimentary rocks (Chs. 2, 7, 9, 10, and...megashear—Systematic left-lateral offset of Neoproterozoic to Lower Jurassic strata and facies, western United States...John H. Stewart 8. Review of Upper Paleozoic and Lower Mesozoic stratigraphy and depositional environments...George E. Gehrels, and Elena Centeno-Garcia 10. Lower Mesozoic facies and crosscutting sequence boundaries: |  | Cosi, M., De Bonis, A., Gosso, G., Hunziker, J., Martinotti, G., Moratto, S., Robert, J.P., Ruhlman, F. (1992) Late proterozoic thrust tectonics, high-pressure metamorphism and uranium mineralization in the Domes Area, Lufilian Arc, Northwestern Zambia. Precambrian Research, 58 (1) 215-240 doi:10.1016/0301-9268(92)90120-d | Journal (article/letter/editorial) | | post-Kibaran cover sequence is subdivided into the Lower Roan Group consisting of well-preserved quartzites...interlayered banded ironstones. The sediments of the Lower Roan Group are interpreted as continentalto lagoonal-evaporitic...into assemblages compatible with lower pressures and slightly lower temperatures. This stage occurs under...lithological or environmental associations. The Lower Roan Group comprises high Mgquartzites with widespread...indicated by the Zambian Geological Survey as "Kabompo Schist Formation" (De Swardt et al., 1964) does not correspond |  | | Journal (article/letter/editorial) | | analysis of cores from active geothermal systems by STEINER (1968, 1977), BROWNE (1970) and BIRD and ELDERS...albite to fracture zones and permeable units. STEINER (1968) has also reported a correlation between...include granites, quartz monzonites, diorites, and biotite schists and gneisses. A discontinuous blanket of...perthite), plagioclase (oligoclase to andesine), biotite, and hornblende, with accessory apatite, sphene...and magnetite. Metamorphic rocks, primarily biotite schist and gneiss, contain plagioclase, microcline |  | | Journal (article/letter/editorial) | | com p le x Juárez m C E A N marine Triassic–Lower Jurassic, units F—Francisco Gneiss Ta—Taray Fm B—La...O—Las Ollas Complex P—Río Placeres Fm. Te—Tejupilco schist Tz—Tzitzio metaflysch −100˚ as si f Montagua...al., 2011). Stars indicate locations of Triassic–Lower Jurassic deep marine facies in central and southwestern...Ortega-Gutiérrez, 1975; OrtegaGutiérrez et al., 1999) or a Lower Paleozoic continental rise prism (Ramírez-Espinosa...et al. (2005) inferred an Upper Pennsylvanian– Lower Permian age for these rocks based on detrital zircon |
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