 | | Report (chapter) | | characterized by a commonality of structure and gold and base-metal deposits along its length, and constitutes...(half arrows) and shortening (large arrows). Ar Rika-Qazaz Shear Zone system (bold) is the main trans-Arabian...ultramylonite at the southeastern end of the Ar Rika-Qazaz Shear System, the main trans-Arabian Shield...between left-stepping faults along the sinistral Ar Rika Fault Zone. On the presumption that the A1 Khushaymiyah...orthogneiss, activity on this section of the Ar Rika Shear Zone is dated at c. 610Ma. Well-documented |  | | Journal (article/letter/editorial) | | shield. HZF: Halaban-Zarghat fault zone; ARF: Ar Rika fault zone; RF: Ruwah fault zone. Inset shows the...faults: HZF: Halaban-Zarghat fault zone; ARF: Ar Rika fault zone; RF: Ruwah fault zone. Inset shows principal...of sinistral shear on the Halaban-Zarghat and Ar Rika faults, using the contacts of the Bani Ghayy and...a period of ductile shearing on the adjacent Ar Rika fault zone, one of the many northwest-trending sinistral...southern part of the Maslum basin adjacent to the Ar Rika fault. Inset is part of an aerialphoto mosaic of |  | | Report (issue) | | showing radon potential of rocks and soils in Fairfax County, Virginia. Reston, Va. : U.S. Geological Survey...radon potential of rocks and soils in Montgomery County, Maryland. Reston, Va. : U.S. Geological Survey...map of the Yellowtail Dam quadrangle, Big Horn County, Montana. Reston, Va. : U.S. Geological Survey...resources of the Borah Peak study area, Custer County, Idaho. Spokane, Wash. : Western Field Operations...Newell. Geologic map of the Judith Mountains, Fergus County, Montana. Res ton, Va. : U.S. Geological Survey |  | | Journal (issue) | | the Unificada mine, Potosi, Bolivia. Top right: Benitoite, 2 cm, from the Benitoite Gem mine, California...N‘Chwaning I mine, Kuruman, South Africa. Bottom right: Mimetite, 2.7 cm, from the Tsumeb mine, Namibia....Record: (1) Stephanite, Husky mine, Canada. (2) Wulfenite, Rowley mine, Arizona. (3) Diaspore twin, Pinarcik...Adelaide mine, Tasmania. (5) Andradite, Antetezambato, Madagascar. (6) Calcite, Mashamba West mine, Congo...Afghanistan. (8) Scorodite, Tsumeb mine, Namibia. (9) Shigaite, N’Chwaning II mine, South Africa. v This special |  | | Show/Event (guide) | | built by the University of Arizona in the Old Pima County Courthouse...including the best wulfenites owned...mineral) and lead itself were a good indication that a gold pocket was contained in the area that they were...knew? M a n y millions o f dollars w o r t h o f gold has been mined in Arizona, and you can see why wulfenite...Training "A Tale of Two Mine Dumps.The Artisanal Gem Miners" North Star Mine, Mammoth, By Robert Weldon...Tintic District, J u a b 1:00 pm - 2:00 pm (MMR) County, Utah." By Brent Thorne Saturday, February 16th |  | | Report (issue) | | ......................................... 26 Ar Rika formation, >700 Ma ........................................................................ 26 Ar Rika formation, >700 Ma ...............................~695 Hinshan formation ?? Amlas formation ?? Ar Rika formation >700 Furayh group ?? Zaytah formation...suture to replace the older term “Halaban group” Ar Rika f.z. and came to be applied to many volcanic Hlu...interlayered with orthogneiss. VMS and epithermal gold deposits characterize the northern part of the Bidah |  | | Book | | Fredriksberg-NV-, Karl "tN.-, Jacobatorpet-, Hokhult-, ...Vetlanda ...........06E SO ........ 34 023 Kallsjo-, Dalang-..., Kleva, Sunnerskog, Slattakra) ..............Vetlanda ...........06F SV ........ 35 024 025 Der Granitsteinbruch... . . . . 1 48 112 erze); Bjiirkdal, Akerberget (Gold) sowie klassische Lokalilalen: Boliden,Mangfallberget...gebiet und var allem gleich zu dessen bedeutendster Mine, der Vretgruva n. Westlich und sudlich davon liegen...Britta und NV-Fredriksberg) wurden nachgewiesen: Gold/ Elektrum (mit Carrollit van Aspri Ila), Akanthit |  | | Journal (article/letter/editorial) | | active plate margins, shear zone hosted mesothermal gold mineralisation related to accretionary and strike-slip...Suture/shear zones Ultramafic complexes Mesothermal lode gold Magnesite Plate margins - active syngenetic A...and are major structural zones similar to those of gold bearing Archaean greenstone terranes and may thus...thus have a mesothermal, shear zone hosted gold potential. R.A. AGAR Interplate syngenetic mineralisation...extent and possi- bly also in setting, with those of gold- rich Archaean terranes (Barley et al., 1990). Magnesite |  | | Journal (article/letter/editorial) | | 175 to 181, 1996 NOTE Determination of trace gold of two-stage and graphite The furnace problem...16, 1996) For the accurate determination of trace gold in rocks and iron minerals by graphite furnace atomic...interference from iron and to effectively concentrate gold. The interference was perfectly condoled by adjusting...the analytical method de veloped, the recovery of gold was >90%, and the precision (C.V.) was 11.7% (1...detection limit for gold was 0.13 pg/kg (concentration in rock) at S/N = 2. The gold concentration of geological |  | | Journal (article/letter/editorial) | | offset by faults of the Najd-fault system (the Ar Rika and Halaban-Zarghat fault zones; Figs. 1 and 2)...faults of the Najd-fault system similar to the Ar Rika and Halaban-Zarghat fault zones shown in Figs. 1...movement on the Halaban-Zarghat (B640 Ma) and Ar Rika faults (B630 Ma); renewed movement on the Ruwah...in the Arabian shield. The system includes the Ar Rika and Halaban-Zarghat fault zones shown in Fig. 1...Structural setting of mineralization in the Al Wajh gold district, Kingdom of Saudi Arabia. Saudi Arabian |  | | Journal (issue) | | (deceased) Philip G. Rust (deceased) SENIOR FELLOWS Gold Level Scott A. Rudolph (2021) Paradise Woods (2019)...Society, supported gem and mineral shows around the county as a museum exhibitor and speaker, and served on... | w w w. FineMineral.com Tourmaline Cruzeiro Mine, Brazil. 19.5 cm Fine Minerals International proudly...greenmountainminerals.com BA R I T E 12 X 8” Parkside Mine, Frizington Copeland, Cumbria, England, UK Photo...specular hematite. In the bed of the access road to the mine, which descends the scarp of the Neogene plateau |  | Eldosouky, Ahmed M., El-Qassas, Reda A. Y., Pham, Luan Thanh, Abdelrahman, Kamal, Alhumimidi, Mansour S., El Bahrawy, Ahmed, Mickus, Kevin, Sehsah, Haytham (2022) Mapping Main Structures and Related Mineralization of the Arabian Shield (Saudi Arabia) Using Sharp Edge Detector of Transformed Gravity Data. Minerals, 12 (1) 71 doi:10.3390/min12010071 | Journal (article/letter/editorial) | | structural framework controls on the distribution of gold deposits in Saudi Arabia. Moreover, we detected...The central zones are the location of significant gold mineralization, i.e., Fawarah, Gariat Avala, Hamdah...connectivity increases with depth and controls numerous gold mines, i.e., Jadmah, Wadi Bidah, Mamilah, and Wadi...their conjugation is suggested to be favorable for gold mineralization. The SF maps revealed the boundary...metamorphism, stratiform, and vein deposits [1]. Many gold (Au) occurrences and other deposits have been detected |  | Doebrich, J. L., Zahony, S. G., Leavitt, J. D., Portacio, J. S., Siddiqui, A. A., Wooden, J. L., Fleck, R. J., Stein, H. J. (2004) Ad Duwayhi, Saudi Arabia: Geology and Geochronology of a Neoproterozoic Intrusion-Related Gold System in the Arabian Shield. Economic Geology, 99 (4) 713-741 doi:10.2113/gsecongeo.99.4.713 | Journal (article/letter/editorial) | | Geochronology of a Neoproterozoic Intrusion-Related Gold System in the Arabian Shield JEFF L. DOEBRICH,†...Duwayhi gold deposit, located in the east-central part of the Arabian shield, is the newest gold discovery...Saudi Arabia. Exploration to date has identified a gold resource of greater than 1 million ounces (oz) with...with significant potential for expansion. Gold mineralization was closely associated, in time and space...alteration. Sericitic alteration was coincident with gold mineralization and produced a quartz-sericite-c |  | | Journal (issue) | | (deceased) Philip G. Rust (deceased) SENIOR FELLOWS Gold Level Scott A. Rudolph (2020) Paradise Woods (2019)...connroxminerals.com e-mail: larryrush@att.net The Crystal Mine Worldwide minerals emphasizing color www.crystal-mine...specimens www.geokrazy.com e-mail: geoff@geokrazy.com Gold and Mineral Diggers Matt and Doug Wallace www.g...KRISTALLE (Wayne & Dona Leicht) Classic minerals and gold specimens www.kristalle.com e-mail: kristalle@mac...supporter of the Natural History Museum of Los Angeles County, beginning in the 1960s when she was a volunteer |  | | Journal (article/letter/editorial) | | Precipitate Aggregates Downstream of an Abandoned Mine Site Mitsuo Manaka Geological Survey of Japan, National...forming downstream of abandoned and/or uncontrolled mine sites generally act as scavengers for heavy metals...aggregates downstream of Ayuta, an abandoned antimony mine site in Tochigi Prefecture, Japan, because its morphology...Precipitate Aggregates Downstream of an Abandoned Mine Site. Minerals 2021, 11, 32. 1. Introduction https://doi...occur downstream of abandoned and/or uncontrolled mine sites. Precipitates occur on river sediments [1–4] |  | | Journal (issue) | | by C. J. Stefano Giroux Point, the Bagdad mine, Yavapai County, Arizona .................................(deceased) Philip G. Rust (deceased) SENIOR FELLOWS Gold Level Scott A. Rudolph (2021) Paradise Woods (2019)...recovered by a miner from the 2800 level of the mine. The miner called the acicular mineral “red copper...the type locality, the 2800 Level of the Tsumeb mine in Namibia—probably the finest specimen of the species...the same boulder from the 2800 Level of the Tsumeb mine, Namibia. William Larson collection; Wendell Wilson |  | | Journal (issue) | | M ontreal Mine! L L The Mineralogical Record MAY–JUNE 2020 • VOLUME 51 • NUMBER 3 • $25 & Wayne...net MAY–JUNE 2020 Articles The Montreal mine, Iron County, Wisconsin .................................. 487 COVER: BARITE, 6.5 cm, from the Montreal mine. David and Karen DeBruin collection, ex Muscatine...(deceased) Philip G. Rust (deceased) SENIOR FELLOWS Gold Level Scott A. Rudolph (2019) Paradise Woods (2019)...photographer and book collector, was born in Cook County, Illinois on July 31, 1932, the son of Sophie Klainowski |  | | Report (volume) | | Delfour, 1979. 11. Zalm; Agar, 1984, 1988. 12. Wadi ar Rika; Delfour, 1980. 13. Wadi al Mulayh; Manivit and...(Letalenet, 1979), Halaban (Delfour, 1979), and Wadi ar Rika (Delfour, 1980) 1:250,000-scale quadrangles, respectively...and forms the bulk of the Murdama. In the Wadi ar Rika quadrangle, Delfour ( 1980) described the Murdama...older granite and volcanic rocks. In the Wadi ar Rika quadrangle, much plutonic "older basement" may in...for volcanic rocks near Bir Jahad, in the Wadi ar Rika quadrangle (Delfour, 1980), 80 km northwest of the |  | | Journal (volume) | | áter upptogs i närheten af Juthylls schakt, fanns mine ralet ånyo af Th . NORDSTRÖM, som analyserade och...de beskrifna blyglanskristallerna , och de båda mine ralen uppträda äfven i regelbunden sammanväxning...påväxta, små kristaller. De vanligaste ledsagande mine ralen voro : blyglans i små glänsande hexaedrar... som visar, att wurtziten är yngre än det andra mine ralet . Wurtzitstänglarna afbrytas lätt efter den...Dock före komma de stundom i stort antal och bilda rika druser. Till sin byggnad äro dessa kristaller C |  | | Journal (article/letter/editorial) | | handful of....... Amaryllis .................. " Am€:rika," steamship...3 6 0, Anemometer, pressure tube....investigations ... 202 Milking machine ........... 32 Mine, submarine .......153, 160 with Mining, hydraulic...glass .... 9 Gas, coal, price of ........ 78 Gas, mine, composition of.. 175 Gas pipes, paper ...........tubes ....... 215 Glass, ultra-violet rays upon 275 Gold in seawater............ 503 Golf ball decision ...Submarine, buoyancy . ... . . . • 215 Mine explosions ............ 88 re Mine gas, composition of... 175 Quarantine |  | | Journal (article/letter/editorial) | | nutzbaren Lagerst~tten fanden sich hier Graphit und Gold. Ersteres in unter gfinstigeren Verkehrsbedingungen...der Arbeiten hingewiesen werden, da spezielI in A~rika die meisten F o r m a t i o n e n iossillos sind |  | | Journal (article/letter/editorial) | | Other Late Proterozoic rocks Najd faults 0 Ar Rika faults Qazaz faults 40° 200 400 km 45° Growth...where they offset deformed ophiolitic zones. The Ar Rika and Qazaz shear zones are after Johnson & Woldehaimanot...E-W-striking extensional veins in the El Sid gold mine and in the Meatiq metamorphic core complex, molasse...between <640 and 620 Ma (Cole & Hedge 1986); the Ar Rika-Qazaz Shear Zone (Fig. 1) was strongly active c...petrogenesis of the Migif-Hafafit gneisses at Hafafit Mine area, Egypt. – Sci. Ser. Int. Bur. 5: 359 p. Ressetar |  | | Journal (article/letter/editorial) | | nrscnlinltigc Ucrirntc! cliridctl nintcrinl such 11s gold ore tlinie. Augcist 4. (led 1 -l'llcrlyl-3-l\letliyl-l'yr~~ol~...SIII. ncnl sult,s. J d y 11. 10,618. Snccliiirinfnl>rikA - G . vortn. Enlilbcr List, tinct 17,970. Kcwton |  | Chen, Jin, Mao, Xiancheng, Deng, Hao, Liu, Zhankun, Wang, Qi (2020) Three-dimensional modelling of alteration zones based on geochemical exploration data: An interpretable machine-learning approach via generalized additive models. Applied Geochemistry, 123. 104781pp. doi:10.1016/j.apgeochem.2020.104781 | Journal (article/letter/editorial) | | anomaly; phyllic alteration; GAM; 28 Dayingezhuang gold deposit -p ro of 21 1. Introduction lP 30... documented as the largest gold deposit in China, with more than 4500 t of gold reserves. 85 Jiaojia-type...the Jiaodong gold deposits and are also 86 the type found in almost all large-scale gold deposits (>...deposits (Song et al., 2015). Thus, Jiaojia-type gold deposits 88 are regarded as having the most economic...(Yang et al., 2014; Mao et al., 2019). Disseminated gold mineralization is the most 120 economically-important |  | | Report (issue) | | Average composition from various types of ore, Thierry mine, Ont. ACANTHITE. Sakharova and Bryzgalov, Mineral...87M/2325 (1987) Analyses (not in abs.) from'Koryu mine, Hokkaido, Japan AIKINITE. Boldyreva (Zap. Vses...Ridge, Tien-shan. AIKINITE. Kovalenker et al., (Gold and silver deposits, "Nauka", Moscow, 91- 110) (1986)...analyses (1) from Bulgaria AIKINITE. Kovlenker, (Gold and silver deposits "Nauka", Moscow, 111-145) (1986)...(1986) (Russian) 431 M565 (10) analyses from gold-silver deposits AIKINITE. Makovicky and Karup-Moller |
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