| | Journal (article/letter/editorial) | The fine-grained rocks of this deposit contain a treasure of rare, if microscopic, man ganese minerals...three new species. The Bald Knob Manganese Deposit ALLEGHANY COUNTY, NORTH CAROLINA W I L L I A M B . SIMMONS...was written, by request, for the March-April North Carolina issue. However, due to space limitations publication...N O B M A N G A N E S E D E P O S I T is one of North Carolina's most unusual and interesting deposits...This inconspicuous little prospect in western North Carolina has been the source of three new minerals and | | | Journal (issue) | 157 by J. Strobbe Manganese minerals of Bald Knob, North Carolina 167 by W. B. Simmons, Jr., D. R. Peacor...found with vuagnatite at Red Mountain, Mendocino County, California (Pabst et al> 1977), has been determined...mcguinnessite spherules from Red M ountain, Mendocino County, California, were analyzed with an ARL EMX- SM...Stanislaus County, California (Bodenlos, 1950), and malachite from Bisbee, Cochise County, Arizona. Other...3Mcguinnessite (this study) from Red Mountain, Mendocino County, California (M g/Cu = 1.17). D(obs.) by suspension | | | Journal (article/letter/editorial) | beneath the Red Dome deposit, near Chillago, Queensland, Australia. The deposit consists of brecciated...about 2 cm wide, from the type locality, Malkhan deposit, Chita Oblast, Russia. =VS\TL1\S`(\N\Z[...Mokhovaya pegmatite veins, Malkhan gem tourmaline deposit, Chita Oblast, Russia. It is a late-stage pocket...green to black crystals occur with andradite in San Benito County, California. In Russia, excellent crystals...clinochlore, variety seraphinite, from the Korshunovsk deposit, Siberia, Russia. Figure 10. Lavender, 2–3-mm | | | Journal (article/letter/editorial) | Pm—piemontite, Grs—grossular, Ep—epidote, Ad—andradite, An—anorthite, Wol—wollastonite. Reaction numbers...we found braunitefree rocks at the Kazagan-Tash deposit in the Southern Urals of Russia that simultaneously...rare and was reliably identified at the Otjosondu deposit in Namibia [23]. The metalliferous deposits are...(Ca2Mn2+)Al2(Si3O12) [reaction 2+ (19)] and epidote with andradite (Ad) Ca3 Fe 2 (Si3O12), anorthite (An) Ca(Al2Si2O8)...braunite-free rocks, together with rhodonite, tephroite, andradite, Mg-pumpellyite, and other minerals. These relations | | | Journal (article/letter/editorial) | them. One exception is the world-class manganese deposit of Nsuta with reserves of 5 million tonnes of oxide...Nangodi and Lawra belts, and of the Nsuta manganese deposit. Early Proterozoic (Birimian) rocks of Ghana are...In Ghana, six parallel greenstone belts trending north to northeast are recognized. The Nangodi belt in...contents are in the range of 0 . 3 - 0 . 4 wt.%. Andradite contents (Fe3+ recalculated from microprobe analyses)...the Lawra belt are recalculated to 13-14 mol.% andradite. Chemical zoning is only rarely observed, and | | | Book (edition) | OX5 1 GB, UK 225 Wyman Street, Waltham, MA 02451, USA Copyright © 2015, 2008 Elsevier B.V. All rights reserved...gangue mineral may be considered as waste in one deposit and as ore mineral in another (e.g., hedenbergite)...particular sample derives from the stockwork of such a deposit, it will normally contain amorphous silica/opal...in modern hydrothermal equivalents (e.g., JADE deposit, Okinawa Trough, Japan). Thus, metasomatic/metamorphic...mineral inventory available elsewhere. Further deposit descriptions originated from: binn.strahlen.org |
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