 | Markowski, Agnès, Vallance, Jean, Chiaradia, Massimo, Fontboté, Lluìs (2006) Mineral zoning and gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador. Mineralium Deposita, 41 (4) 301-321 doi:10.1007/s00126-006-0062-x | Journal (article/letter/editorial) | | occurrence in the Fortuna skarn mine, Nambija district, Ecuador Received: 24 February 2005 / Accepted:...located in the northern part of the Nambija gold district, southern Ecuador. It has been subdivided into...alteration in the intrusion grades into a K-feldspar ± biotite ± magnetite assemblage (K-alteration), suggesting...subdivided into a dominant brown garnet skarn, a distal green pyroxene– epidote skarn, and two quartz-rich...skarn types. The proximal massive brown garnet skarn zone is centered on two 060° trending faults in Mine |  | | Journal (article/letter/editorial) | | Mineralization in the McLarenDeposit, New World District,ParkCounty,Montana TODDW. JOHNSON ø ANDLAWRENCE...replacements in the Meagher dolomitielimestone(with biotite,ehlorite,andtale) andveinsanddisseminations in...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 |  | | Journal (article/letter/editorial) | | veins along a NNW- trending brittle-ductile shear zone cutting through successions of pelitic schists,...distinct zones, namely distal chlorite-calcite zone (chloritezcalcite¡biotite¡pyrite¡ sericite¡epidote)...sericite-chlorite zone (sericitezchloritezpyrite¡biotite), and a proximal pyrite-sericite zone (quartzzpyr...the unaltered metasediments. The pyrite-sericite zone contains the highest gold grades, especially in...calculations have revealed that the pyrite-sericite zone experienced significant metasomatic changes relative |  | Zheng, Wenbao, Tang, Juxing, Zhong, Kanghui, Ying, Lijuan, Leng, Qiufeng, Ding, Shuai, Lin, Bin (2016) Geology of the Jiama porphyry copper–polymetallic system, Lhasa Region, China. Ore Geology Reviews, 74. 151-169 doi:10.1016/j.oregeorev.2015.11.024 | Journal (article/letter/editorial) | | performed by members of the Jiama Exploration Project Team over a AC period of 6 years. We propose...Cu–polymetallic, hornfels Cu–Mo, porphyry Mo ± Cu, and distal Au mineralization. The development of skarn Cu–polymetallic...Jiama deposit was controlled mainly by the contact zone between porphyries and marbles, an interlayer detachment...fracture system related to intrusions, and the distal Au mineralization resulted from late-stage hydrothermal...proximal skarn to the intermediate skarn to the distal skarn, the garnet/pyroxene ratio varies from >20:1 |  | | 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) | | Kozbudaklar scheelite skarn deposit in the Tavşanlı Zone, located approximately 22 km southeast of Bursa...with increasing hydrous mineral content (epidote, biotite, amphibole, etc.) (Newberry and Einaudi, 1981;...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 |  | | 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 |  | Pal, Debasis, Chinnasamy, Sakthi Saravanan, Goon, Swapnendu, John, Manish M., Ghosh, Subhasish (2019) Alteration mineralogy, fluid inclusions and stable isotope studies from Chigargunta and Bisanatham gold deposits, South Kolar Greenstone Belt, Dharwar Craton, India: Implications on genesis of gold mineralization. Ore Geology Reviews, 111. 102946 doi:10.1016/j.oregeorev.2019.102946 | Journal (article/letter/editorial) | | mineralogy that consists of tourmaline, muscovite, biotite, chlorite, epidote, sericite, calcite and quartz...associated with pyrrhotite in the inner and proximal zone of both the deposits. Fluid inclusion petrography...from quartz-calcite veins within the mineralized zone at Chigargunta reveal a low to medium salinity (0...(Siddaiah and Rajamani, 1989). Although the main mining camp in the Central Kolar is abandoned now, there...hydrothermal alteration mineralogy across the shear zone that formed around the quartz-calcite veins at both |  | | Book | | individual deposits or districts. (in brackets country, district, deposit reviewed): Adamek P. (Scandinavia), Adams...Africa, Namibia), Chenoweth W. (Colorado Plateau, USA), Coste A. (Limousin, France), Cuney M. (granites...Grauch R (western USA), Gautier A. (breccia pipe deposits, USA), Halladay Ch.R (eastern USA), Harshman E.N...N. (Wyoming Basins, USA), Hruby J. (CSFR), Kolb S. (Bavaria, W-Germany), Krol W. (Eastern Europe), Matos...(general), Ramdohr P. (mineralogy, metallogenesis), Robertson J.A. (Blind River-Elliot Lake, Canada), Ruhrmann |  | Wang, Changming, Zhang, Da, Wu, Ganguo, Santosh, M., Zhang, Jing, Xu, Yigan, Zhang, Yaoyao (2014) Geological and isotopic evidence for magmatic-hydrothermal origin of the Ag–Pb–Zn deposits in the Lengshuikeng District, east-central China. Mineralium Deposita, 49 (6) 733-749 doi:10.1007/s00126-014-0521-8 | Journal (article/letter/editorial) | | origin of the Ag–Pb–Zn deposits in the Lengshuikeng District, east-central China Changming Wang & Da Zhang...Heidelberg 2014 Abstract The Lengshuikeng ore district in east-central China has an ore reserve of ∼43...characteristics, the mineralization in the Lengshuikeng ore district can be divided into porphyryhosted and stratabound...the proximal zone; sericitization, silicification, and carbonatization in the peripheral zone; and sericitization...sericitization and carbonatization in the distal zone. The stratabound mineralization occurs in volcanosedimentary |  | | Journal (article/letter/editorial) | | Habibeh Atapour a,*, Alijan Aftabi b aDepartment of Mining Engineering, Shahid Bahonar University of Kerman...granodiorite-related magnesian skarn halo and hydrothermal feeder zone on the geological map-cross section is inconsistent...indicate further concealed BIFs in the Sanandaj-Sirjan Zone. Key words: Magnetite, Discrimination diagrams,...the lack of granodiorite-related magnesian skarn zone (3) an ambiguous mineral paragenetic sequence (4)...hornblende-biotite gives 174.1-163.5 Ma, but it is inaccurate because hornblende and biotite are not co-paragenetic |  | | 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 |  | Takodjou Wambo, Jonas Didero, Pour, Amin Beiranvand, Ganno, Sylvestre, Asimow, Paul D., Zoheir, Basem, Salles, Rodrigo dos Reis, Nzenti, Jean Paul, Pradhan, Biswajeet, Muslim, Aidy M. (2020) Identifying high potential zones of gold mineralization in a sub-tropical region using Landsat-8 and ASTER remote sensing data: A case study of the Ngoura-Colomines goldfield, eastern Cameroon. Ore Geology Reviews, 122. 103530pp. doi:10.1016/j.oregeorev.2020.103530 | Journal (article/letter/editorial) | | California Institute of Technology, Pasadena, CA 91125, USA 4Department 5University 6Centre of Geology, Faculty...kaolinite, muscovite, chlorite and epidote at district scale. The Automated Spectral Hourglass (ASH)...identified, which are spatially associated with known mining areas and gold occurrences in the study area. High...satellite-based mineral prospectivity maps at regional and district scales were generated for the study area by implementing...Active gold extraction from the three main gold mining districts in eastern Cameroon targets mineralization |  | | Book | | GEOLOGY OF THE ELSINORE FAULT ZONE SAN ·DIEGO REGION • , . San Diego Association of Geologists South...nor0000unse • GEOLOGY OF THE ELSINORE FAULT ZONE SAN DIEGO REGION San Diego Association of Geologists...of the Elsinore Fault Zone San Diego Region Geology of the Elsinore Fault Zone. San Diego Region Copyright...and co111position by W.G. Hample & Associates Project n1anage1nent by Lowell Lindsay Printed in the United...Cataloguing-in-Publication Data Geology of the Elsinore Fault Zone, San Diego Region / co-editors, Monte L. Murbach |  | 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...(10−15%), quartz quartz (20–25%), (20−25%), biotite biotite (15–20%), (15−20%), and and hornblende (3%–5%)...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...plagioclase plagioclase (10–15%), (10−15%), and and biotite biotite (2–3%). (2−3%). Tungsten orebodies mainly occur |  | Zhang, Liang, Yang, Li-Qiang, Weinberg, Roberto F., Groves, David I., Wang, Zhong-Liang, Li, Guang-Wei, Liu, Yue, Zhang, Chao, Wang, Zhao-Kun (2019) Anatomy of a world-class epizonal orogenic-gold system: A holistic thermochronological analysis of the Xincheng gold deposit, Jiaodong Peninsula, eastern China. Gondwana Research, 70. 50-70 doi:10.1016/j.gr.2018.12.013 | Journal (article/letter/editorial) | | University of Melbourne, Vic 3010, Australia Gold Mining Stock Co., Ltd., Laizhou 261400, China CE f Shandong...University of Geosciences 29# Xue-Yuan Road, Haidian District, Beijing 100083, China Phone: (+86-10) 8232 1937...hangingwall of the Linglong detachment fault or distal to the fault in the footwall, comprise the Precambrian...granite yielded muscovite 40Ar/39Ar 2011), a biotite ages of 143±1.5 Ma (Charles et al., 2013) and...by a 030–040° trending SE-dipping ductile shear-zone with mylonitic–ultramylonitic rocks overprinted |  | | 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...pluton; (5) caldera subsidence and its ®lling by biotite-hornblende andesite volcanics, emplacement of quartz-diorite...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 |  | | 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 |  | | Journal (article/letter/editorial) | | MINERALIZATION IN AN INTRUSION-RELATED, GEOCHEMICALLY ZONED DISTRICT-SCALE ALTERATION SYSTEM IN THE CAROSUE BASIN,...this area. Zones of sodic (albite) and potassic (biotite) alteration are enveloped sequentially by phyllic...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 |  | Benkó, Zsolt, Mogessie, Aberra, Molnár, Ferenc, Hauck, Steven, Severson, Mark, Ettinger, Karl (2018) The Influence of Thermal Differences and Variation of Cl–F–OH Ratios on Cu-Ni-PGE Mineralization in the Contact Aureole of the South Kawishiwi Intrusion, Duluth Complex. Geosciences, 8 (12) 474 doi:10.3390/geosciences8120474 | Journal (article/letter/editorial) | | Trunk Highway Duluth, Minneapolis, MN 55811-1442, USA; shauck@nrri.umn.edu (S.A.H.); mseverso@nrri.umn...assemblages, two-pyroxene, titanium-in-quartz, and biotite-apatite thermometers indicate that temperatures...concentrations in biotite and apatite. Fluorine and chlorine concentrations in biotite increase as a function...in the halogen concentration of syn-metamorphic biotite and apatite was also observed [18] and assumed...titanium-in-quartz thermometry [27], and apatite-biotite thermometry [28]. Another purpose of this study |  | | Journal (article/letter/editorial) | | Habibeh. Atapour1* Alijan. Aftabi2 1 Department of Mining Engineering, Shahid Bahonar University of Kerman...occurs in a proximal felsic tuff cone and jaspilitic distal zones and contains 1 million tonne of hematite-rich...geohistory. The alteration minerals in the proximal and distal zones are actinolite, ripidolite, epidote, sericite...of hematite, chert, quartz, chlorite, sericite, biotite, carbonates, plagioclase, apatite and tourmaline...Of these, the Ediacaran Fe-P ores of Bafq mining district (E4) and Hormuz Fe-salt ore (E5) are shown |  | Romero, Bárbara, Kojima, Shoji, Wong, Chilong, Barra, Fernando, Véliz, Walter, Ruiz, Joaquin (2011) Molybdenite Mineralization and Re-Os Geochronology of the Escondida and Escondida Norte Porphyry Deposits, Northern Chile. Resource Geology, 61 (1) 91-100 doi:10.1111/j.1751-3928.2010.00150.x | Journal (article/letter/editorial) | | Geosciences, University of Arizona, Tucson, Arizona, USA 3 Abstract Molybdenum is an economically important...particularly in the chlorite-sericite transitional zone between the potassic and sericitic zones. Two modes...the molybdenite mineralization in the Escondida district occurred as several short episodic pulses during...y. Keywords: Chile, geochronology. Escondida district, molybdenite 1. Introduction The Escondida porphyry...Romero et al. Fig. 1 Location map of the Escondida district and the North Chilean Eocene-Early Oligocene porphyry |  | | Journal (article/letter/editorial) | | org/10.1007/s00126-018-0811-7 ARTICLE The shear zone-related gold mineralization at the Turmalina deposit...Distrito Federal 70910-900, Brazil Brazilian mining district located in the southern São Francisco Craton...volcano-clastic rocks. The deposit comprises two shear zone-controlled orebodies (A and B) (Fig. 2). They are...about 4 g/t. The Turmalina Mining Corporation, which belongs to Jaguar Mining, Inc., is currently the holder...in the Turmalina Project were 540,000 oz with a grade of 4.93 g/t Au (Jaguar Mining 2017). The processes |  | Laakso, K., Peter, J. M., Rivard, B., White, H. P. (2016) Short-Wave Infrared Spectral and Geochemical Characteristics of Hydrothermal Alteration at the Archean Izok Lake Zn-Cu-Pb-Ag Volcanogenic Massive Sulfide Deposit, Nunavut, Canada: Application in Exploration Target Vectoring. Economic Geology, 111 (5) 1223-1239 doi:10.2113/econgeo.111.5.1223 | Journal (article/letter/editorial) | | characterized by the muscovite-biotite-sillimanite and chlorite-biotite-cordierite mineral suite. Proximal...micas are Al rich to potassic muscovite, and the biotite and chlorite are Mg rich. In areas that are immediately...and intermediate to Fe-rich biotite and chlorite. Outboard of this, distal areas are characterized by...potassic muscovite and Mg-rich biotite and chlorite. The white micas and biotite/chlorite group minerals display...wavelength positions. The variations in muscovite and biotite/chlorite compositions (as determined by the Al-OH |  | Bogossian, Jessica, Hagemann, Steffen G., Rodrigues, Vinicius G., Lobato, Lydia Maria, Roberts, Malcolm (2020) Hydrothermal alteration and mineralization in the Faina greenstone belt: evidence from the Cascavel and Sertão orogenic gold deposits. Ore Geology Reviews, 119. 103293 doi:10.1016/j.oregeorev.2019.103293 | Journal (article/letter/editorial) | | The bulk of the gold is hosted in quartzite and biotite schist at Cascavel, and carbonaceous schist and...characterized by distal quartz-K-feldspar±muscovite, intermediate quartz-fuchsitic mica-biotite-pyrite, and...mica-pyrite±chalcopyrite. The biotite schist is characterized by distal quartz-chlorite-calcite and proximal...proximal white mica-biotite-tourmaline-siderite-pyrite. Native gold is located within intensely deformed...in proximal alteration zones. Sertão is a shear zone-hosted gold deposit with orebodies controlled by |
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