 | | Journal (article/letter/editorial) | | Mineralization in the McLarenDeposit, New World District,ParkCounty,Montana TODDW. JOHNSON ø ANDLAWRENCE...Au-Cu-Agskarnand replacementdepositsin the CookeCity, in Park County, Montana,and extends ø Presentaddress:NorandaExploration...xploration,Inc., P.O. Box 7176, Reno, Nevada 89510. 0361-0128/94/1591/969-25 $4.00 southward into northernWyoming...Leadandsilver-bearing ore wasfirstdiscovered in the New World district in 1869. Numerous small de- 9 69 970 JOHNSON...exploitation. of the Au, Cu, andAg productionwithin the district. the Como sediment-hostedAu-Cu-Ag deposit was |  | | Journal (article/letter/editorial) | | Byzantine times based on the existence of the old mining tools at Atud area (Klemm et al. 2001)], the Atud...and 1969 by the Egyptian Geological Survey and Mining Authorities (EGSMA) (Gabra 1986). EGSMA studied...workings in detail, including drilling, mapping, mining, and sampling mineralized and barren quartz veins...deposit has 1600 tons of waste dump material from the mining of the Pharaonic age with 12.4 g/t of gold. Details...magmatic activities occurred at the subduction-related zone (Gass 1977; El-Gaby et al. 1988). A compressional |  | | Journal (article/letter/editorial) | | pyroxene-biotite quartzofeldspathic gneiss. A narrow zone of endoskarn (<1 m; scapoliteK feldspar-Ca clinopyroxene)...clinopyroxene-phlogopite, Ca clinopyroxene-tremolite-phlogopite, tremolite-phlogopite (distal), marble), which hosts the...the mineralized exoskarn to medium grained in the distal skarn. Locally coarser minerals are associated...green, low Fe distal pyroxene (see Table 2). A general description of proximal to distal primary marblehosted...00 $6.00 1325 pegmatite contact. Tremolite occurs in the distal skarns with phlogopite and calcite |  | Demir, Yılmaz, Uysal, İbrahim, Kandemir, Raif, Jauss, Andrea (2017) Geochemistry, fluid inclusion and stable isotope constraints (C and O) of the Sivrikaya Fe-skarn mineralization (Rize, NE Turkey) Ore Geology Reviews, 91. 153-172 doi:10.1016/j.oregeorev.2017.10.008 | Journal (article/letter/editorial) | | with late hydrous minerals, such as epidote, tremolite, actinolite and chlorite. The ore minerals are...Metallogenic Belt is one of the most important mining regions in Turkey, including volcanogenic massive...porphyry-type ore deposits. Most academic studies and mining activities have primarily focused on massive sulfide...units, the Strandja Masif, the İstanbul Zone and the Sakarya Zone, which were assembled at three different...and Tüysüz, 1999). The eastern part of the Sakarya Zone is called the Eastern Pontides (Fig. 1b), a geographic |  | | Journal (article/letter/editorial) | | SÏtohl á V. KonecÏny The Banska Stiavnica ore district: relationship between metallogenetic processes...Abstract The Banska Stiavnica ore district is in the central zone of the largest stratovolcano in the...have been identi®ed in the Banska Stiavnica ore district: 1. Quartz-pyrophyllite-pyrite high-sulphidation...around the granodiorite intrusion. The mineralized zone is represented by accumulations of chalcopyrite...productive intrusions includes an external zone of propylitization, a zone of argillitic alteration (kaolinite |  | Naleto, João Luís Carneiro, Perrotta, Mônica Mazzini, Costa, Felipe Grandjean da, Souza Filho, Carlos Roberto de (2019) Point and imaging spectroscopy investigations on the Pedra Branca orogenic gold deposit, Troia Massif, Northeast Brazil: Implications for mineral exploration in amphibolite metamorphic-grade terrains. Ore Geology Reviews, 107. 283-309 doi:10.1016/j.oregeorev.2019.02.019 | Journal (article/letter/editorial) | | spectro-mineralogical patterns of alteration minerals at both district and deposit scales. The spectroscopic data were...crystallized Al-rich white mica in distal zones and Al-poor white mica in the ore zone. Reflectance spectroscopy...according to proximity to the gold lodes: (i) a proximal zone, in which diagnostic minerals are white mica, Fe-...quartz, albite and sulfides; (ii) an intermediate zone, defined by the dominant presence of Fe- or Mg-bearing...minor chlorite and rare sulfides; and (iii) a distal zone, characterized by the occurrence of chlorite |  | | Journal (article/letter/editorial) | | Kozbudaklar scheelite skarn deposit in the Tavşanlı Zone, located approximately 22 km southeast of Bursa...varying composition were emplaced in the Sakarya Zone and Anatolide-Tauride platform in the time interval...Kozbudaklar village in the Tavşanlı zone at the south of the İzmir-Ankara suture zone (Fig. 1). In the study area...scheelite mineralization is known in this skarn zone (Romberg, 1938; MTA, 1965; Pehlivan, 1987), there...systems. 2. Geological setting The İzmir-Ankara Suture zone, which defines the closure of the Neotethys ocean |  | Su, Qiangwei, Mao, Jingwen, Sun, Jia, Zhao, Linghao, Xu, Shengfa (2020) Geochemistry and Origin of Scheelites from the Xiaoyao Tungsten Skarn Deposit in the Jiangnan Tungsten Belt, SE China. Minerals, 10 (3) 271 doi:10.3390/min10030271 | Journal (article/letter/editorial) | | with garnet in the proximal zone (Sch1a) and with pyroxene in the distal zone (Sch1b), (2) scheelite replaced...K-feldspar. The granite in the northern part of of the mining area was dated to 130–124 Ma by LA–ICP–MS zircon...zircon U–Pb methods [29]. This granite the mining area was dated to 130–124 Ma by LA–ICP–MS zircon U–Pb methods...with retrograde alteration minerals of epidote, tremolite, actinolite, chlorite, quartz, fluorite and calcite...drillincore the skarn has ahas pyroxene-dominated distal distal a garnet-dominated proximal shallow to deep |  | | Journal (article/letter/editorial) | | Bafq and Zanjan districts in Iran, the Great Bear zone in Canada, the Adirondack and Missouri districts...At Luohe, marine evaporite layers appear in the mining area and have a close spatial relationship with...located in the western part of the Luzong ore district, which is one of the major Fe ore districts in...China (Figure 1). The strata of the Luzong ore district can be divided into three parts: (1) pre-Sinian...trachyandesite of the Shuangmiao Formation occur in the mining area [13,34,57–59]. There are three types of ores |  | | Book | | 310 Pillsbury Drive S. E. Minneapolis, MN 55455, USA Volumes 1 to 9 in this series appeared under the...are of considerable aid to the exploration and mining geologist in areas of known mineralization, but...advanced undergraduate and graduate levels, and to mining and exploration geologists. lowe no small debt...and to Peter Wyllie for initially suggesting the project and for encouragement during its evolution. Frederick.................. . 83 The Fresnillo Ag-Pb-Zn District, Zacatecas, Mexico .......................... |  | | Journal (article/letter/editorial) | | MINERALIZATION IN AN INTRUSION-RELATED, GEOCHEMICALLY ZONED DISTRICT-SCALE ALTERATION SYSTEM IN THE CAROSUE BASIN,...alteration. A central zone of anomalous BiW-Mo-Cu-Pb-Ag enrichment is enveloped by a zone of relative Zn and...coincident with the muscovite alteration zone. The district-scale potassic alteration is attributed to...the Carosue basin, within the district-scale muscovite alteration zone. Intrusions and hematite are volumetrically...carbonate alteration and arsenopyrite. The Carosue Dam district represents an important example of a large, Archean |  | | Journal (article/letter/editorial) | | Neoproterozoic banded iron formations (BIFs) at Bafq mining district (BMD), Central Iran: The possible Ediacaran...Neoproterozoic banded iron formations (BIFs) at Bafq mining district (BMD), Central Iran: The possible Ediacaran...link of BIFs in Tethyan metallogeny PT Bafq mining district (BMD), Central Iran: The possible Ediacaran...pyrolusite-jaspilite deposits in the Bafq mining district (BMD) contain more than 1.7 Gt ores with an...occur in proximal zone of magnetite-rich albitized rhyolite (keratophyres), interdistal zone of rhyolitic |  | Mao, Jingwen, Zhou, Yunman, Liu, Huan, Zhang, Changqing, Fu, Degui, Liu, Bo (2017) Metallogenic setting and ore genetic model for the Beiya porphyry-skarn polymetallic Au orefield, western Yunnan, China. Ore Geology Reviews, 86. 21-34 doi:10.1016/j.oregeorev.2017.02.003 | Journal (article/letter/editorial) | | Sciences, No. 26 Baiwanzhuang Street, Xicheng District, Beijing 100037, China E-mail: jingwenmao@263...intrusions and Triassic limestone country rocks, and 3) distal stratiform Pb–Zn–Ag–Au epithermal orebodies. Subsequent...during Eocene–Oligocene intraplate extension. The distal stratiform Pb-Zn-Ag-Au orebodies are hosted by...the middle part of the Ailaoshan regional fault zone, which marks the western boundary of the Yangtze...Songgui synclines (Fig. 2). The orebodies in the district are controlled by a series of faults that are |  | Li, Li-Xing, Zi, Jian-Wei, Li, Hou-Min, Rasmussen, Birger, Wilde, Simon A., Sheppard, Stephen, Ma, Yu-Bo, Meng, Jie, Song, Zhe (2019) High-Grade Magnetite Mineralization at 1.86 Ga in Neoarchean Banded Iron Formations, Gongchangling, China: In Situ U-Pb Geochronology of Metamorphic-Hydrothermal Zircon and Monazite. Economic Geology, 114 (6) 1159-1175 doi:10.5382/econgeo.4678 | Journal (article/letter/editorial) | | economically important iron deposits in China. Located in mining area II, it is a high-grade (>50 wt % Fe) magnetite...intergrown with garnet from the proximal alteration zone of a high-grade iron orebody yielded an age of 1...the proximal zone changing to a chlorite-quartz–dominated assemblage in the distal zone, can be attributed...stemming from studies of highgrade magnetite ore in mining area II of the Gongchangling iron deposit (GII)...2015b). The high-grade ores of the GII have a long mining history tracing back 1,000 years. Early researchers |  | | Journal (article/letter/editorial) | | encountered in a deep-seated lineamentary fault zone cutting through metaultrabasic rocks along the northern...northern edge of the granites. The same structure zone forms the loci of calcite-bearing U episyenite situated...samples have been taken at outcrop, from abandoned mining galleries, open pits and drill cores, each weighing...part of the Saxothuringian Zone and the northern part of the Moldanubian Zone extending along the western...the S beneath the allochthonous TepláBarrandian Zone during Early through Mid Devonian times, nappes |  | Tedeschi, Michael, Hagemann, Steffen G., Roberts, Malcolm P., Evans, Noreen J. (2018) The Karouni Gold Deposit, Guyana, South America: Part II. Hydrothermal Alteration and Mineralization. Economic Geology, 113 (8) 1705-1732 doi:10.5382/econgeo.2018.4610 | Journal (article/letter/editorial) | | km apart along the NW-striking Smarts-Hicks shear zone. Both deposits are hosted within a sequence of greenschist...2 km apart on the NW-striking Smarts-Hicks shear zone (Fig. 2) and are hosted within greenschist facies...dikes located adjacent to the Smarts-Hicks shear zone. Gold mineralization is interpreted to have occurred...Central Guiana shear zone, GFZ = Guri fault zone, IASZ = Issano-Appapari shear zone, MKSZ = Makapa-Kuribrong...Makapa-Kuribrong shear zone, NGT = Northern Guiana trough, TTG = tonalite-trondhjemite-granodiorite. Downloaded |  | | Report (volume) | | 5808 South Rapp St., Suite 209 Littleton, CO 80120 USA Telephone: (303) 797-0332 FAX: (303) 797-0417 Price... oh tee seareae 203 The Banska Stiavnica Ore District: Relationship between Metallogenetic Processes...Slovakia, and many other deposits (e.g. several mining districts in the Oas-Gutai Mtns., Tokaj Mtns.,...to rich mining cities whose splendor still lasts, and also supported the development of mining technologies...treatise on medieval mining methods by Agricola is based on his experience from these mining districts. In the |  | Casillas, Ramón, Demény, Attila, Nagy, Géza, Ahijado, Agustina, Fernández, Carlos (2011) Metacarbonatites in the Basal Complex of Fuerteventura (Canary Islands) The role of fluid/rock interactions during contact metamorphism and anatexis. Lithos, 125 (1) 503-520 doi:10.1016/j.lithos.2011.03.007 | Journal (article/letter/editorial) | | the contact zone. The original igneous mineralogy disappeared completely in the anatectic zone, and a metamorphic...indicates that the carbonatites within the anatectic zone have undergone a thermal metamorphism under hornblende–hornfels...these marbles (calcite, dolomite, phlogopite, tremolite, Na, Al-enriched amphibole and diopside) are very..., 2006; Le Bas et al., 1986; Robertson and Bernouilli, 1982; Robertson and Stillman, 1979a, 1979b). Onlapping...(Gutiérrez et al., 2006; Muñoz and Sagredo, 1994; Robertson and Stillman, 1979b). The intrusion of plutons |  | | Book | | A Comprehensive Example: The Cree de District, Colorado, USA 4.11. Summary 4.12. Recommended Reading...a generous grant toward the completion of this project. This book would not have been completed without...comprising >50% of the host rock Tabular An ore zone that is extensive in two dimensions, but has a restricted...Diamond in kimberlite pipes Footwall alteration zone of volcanic-hosted massive sulfide deposits (see...addition to improved techniques of exploration, mining, extraction, and management, by a better understanding |  | | Report (issue) | | Indian lands _________ ___4 Geologic studies of mining districts and mineral-bearing regions __________________________4...___123 Hawaii _____________________________123 Nevada _____________________________124 Oregon ______...studies in Fairfax County, Virginia _____________________285 Puget Sound region ESA project _______________285...accuracy testing ___—___—————————318 Viking II project ________________________318 Photoimage mapping...Regional offices ______________________351 Area and district offices __________________351 U.S. Geological |  | Zegers, T. E., Barley, M. E., Groves, D. I., McNaughton, N. J., White, S. H. (2002) Oldest Gold: Deformation and Hydrothermal Alteration in the Early Archean Shear Zone-Hosted Bamboo Creek Deposit, Pilbara, Western Australia. Economic Geology, 97 (4) 757-773 doi:10.2113/gsecongeo.97.4.757 | Journal (article/letter/editorial) | | Hydrothermal Alteration in the Early Archean Shear Zone-Hosted Bamboo Creek Deposit, Pilbara, Western Australia...bedding-parallel, brittle-ductile shear zone (the Bamboo Creek shear zone) within a komatiite sequence. The...shear zone and are associated with early sinistral, northeast-up deformation in the shear zone, whereas...whereas dextral reactivation of the zone postdates gold deposition. Gold-related alteration zones reflect...reflect an increase in XCO2 toward the mineralized zone. Variations in original host-rock composition give |  | | Report (issue) | | of the Corbet Massive Sulphide Deposit, Noranda District, Quebec, Canada My-eknuckeycand Jo) Watkitisieasenae...Canada from H.S. Robinson, a prominent Canadian mining geologist whose interest in Precambrian sulphide...it. Special grants from Cominco Limited, Selco Mining Corporation Limited and Shell Canada Resources...déformations causées par une compression liée 4 une zone de subduction protérozoique dans le sud de la province...range from volcanic-derived epiclastic rocks to distal turbidites. Thin but laterally persistent pyritic-graphitic |  | | Journal (article/letter/editorial) | | observed to have developed as veins in the exoskarn zone (Kuşcu et al., 2002; Terzi, 2014), and Cu and Ag...Mineral Mining Incorporated Company. The iron production capacity is 10.000 t/y (Vefa Mineral Mining Inc...(CACC) bounded by the İzmir–Ankara–Erzincan Suture zone in the north, Anatolide–Tauride platform in the...Parlak and Delaloye (1999), the supra-subduction zone-type Central Anatolian ophiolites obduct on metamorphic...collision along the İzmir-Ankara-Erzincan suture zone. These were emplaced in the region by cutting the |  | | Conference Proceedings (Volume) | | very north of Sweden. Mining operations started in 1968 and the current mining depth is 430 m. The open........................... 13 The moral case for mining – is it a question the industry can answer? .......... 17 Yasushi Watanabe Sustainability in mining and exploration: the role of geosciences ........epithermal gold potential areas in Eastern Rhodope zone (Western Thrace, NE Greece) .....................A regional scale 3D-model of the Skellefte mining district, northern Sweden ........................ |  | Figueiredo e Silva, R. C., Hagemann, S., Lobato, L. M., Rosiere, C. A., Banks, D. A., Davidson, G. J., Vennemann, T., Hergt, J. (2013) Hydrothermal Fluid Processes and Evolution of the Giant Serra Norte Jaspilite-Hosted Iron Ore Deposits, Carajas Mineral Province, Brazil. Economic Geology, 108 (4) 739-779 doi:10.2113/econgeo.108.4.739 | Journal (article/letter/editorial) | | hard ores, including: (1) an early alteration zone (distal portion of orebodies), characterized by recrystallization...dissolution of carbonate; and (3) proximal alteration zone having various types of hard and hard-porous hematite...modified magmatic fluids. Sulfides from the distal zone of metabasaltic rocks have δ34S values close...Calcite-kutnahorite δ13C and δ18O values from the distal alteration zones show a large δ13C range of –5...FIGUEIREDO E SILVA ET AL. advanced hydrothermal zone, i.e., ore, exhibit a wider δ18O range from 15.1 |
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