DOCSLIB.ORG

Technical Report Gold –Silver Resource Estimate of the La Josefina Project Santa Cruz, Argentina

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Technical Report Gold –Silver Resource Estimate of the La Josefina Project Santa Cruz, Argentina Technical Report Gold –Silver Resource Estimate of the La Josefina Project Santa Cruz, Argentina C. Gustavo Fernandez, P. Geo. UAKO Consultora Geológica September 29th, 2010. Prepared for Hunt Mining Corp. Gold - Silver Resource Estimate for the La Josefina Project Page 1 Contents 1.0 Summary ................................................................................................................................. 8 2.0 Introduction .......................................................................................................................... 13 2.1. Project Scope and Terms of Reference ................................................................................ 14 2.2. Frequently used acronyms, abbreviations, definitions and units of measure ................... 14 3.0 Reliance on other experts .................................................................................................... 15 4.0 Property description and location ....................................................................................... 15 4.1. General ................................................................................................................................. 15 4.2. Mineral tenure...................................................................................................................... 17 4.3. Cerro Cazador – Fomicruz agreement................................................................................. 20 4.4. Royalties ............................................................................................................................... 21 4.5. Environmental aspects ......................................................................................................... 22 4.6. Permits Required .................................................................................................................. 22 5.0 Accessibility, Climate, Local Resources, Infrastructure and Physiography ........................ 22 6.0 History ................................................................................................................................... 24 7.0 Geological Setting ................................................................................................................. 26 7.1. Regional geology .................................................................................................................. 26 7.2. Geology of the Deseado Massif ........................................................................................... 27 7.2.1. Pre-Jurassic rocks ............................................................................................................. 28 7.2.2. Jurassic volcanics .............................................................................................................. 29 7.2.3. Tertiary to Quaternary Flood Basalts and Post-Jurassic deposits .................................. 30 7.3. Geology of La Josefina Project ............................................................................................. 30 8.0 Deposit Types ....................................................................................................................... 33 9.0 Mineralization ...................................................................................................................... 35 9.1. General ................................................................................................................................. 35 9.2. Description of mineralized zones......................................................................................... 37 9.2.1. Noreste Area ..................................................................................................................... 37 9.2.1.1. Sinter target .................................................................................................................. 37 9.2.2. Veta Norte Area ................................................................................................................ 40 9.2.2.1. Veta Amanda Target .................................................................................................... 40 9.2.2.2. Veta Cecilia Target ........................................................................................................ 41 9.2.2.3. Veta Sur target.............................................................................................................. 43 9.2.3. Central Area ...................................................................................................................... 44 Gold - Silver Resource Estimate for the La Josefina Project Page 2 9.2.4. Piedra Labrada Area ......................................................................................................... 46 10.0 Exploration ........................................................................................................................... 47 10.1. Current Exploration .......................................................................................................... 47 10.2. Historical Exploration ....................................................................................................... 48 10.2.1. Noroeste Area................................................................................................................... 48 10.2.1.1. Sinter target .................................................................................................................. 48 10.2.1.2. Subsinter and Lejano target ......................................................................................... 48 10.2.2. Veta Norte Area ................................................................................................................ 49 10.2.3. Central Area ...................................................................................................................... 50 11.0 Drilling ................................................................................................................................... 50 11.1. Historical Drilling Summary ............................................................................................. 50 11.2. Recent Drilling Summary .................................................................................................. 51 11.3. Drilling Results .................................................................................................................. 52 11.3.1. Noreste Area ..................................................................................................................... 52 11.3.1.1. Sinter target - Historical Drilling .................................................................................. 52 11.3.1.2. Sinter target - Recent Drilling....................................................................................... 52 11.3.2. Veta Norte Area ................................................................................................................ 53 11.3.2.1. Historical Drilling .......................................................................................................... 53 11.3.2.2. Veta Norte Area– Recent Drilling................................................................................. 54 11.3.3. Central Area ...................................................................................................................... 55 11.3.3.1. Historical Drilling .......................................................................................................... 55 11.3.3.2. Central Area – Recent Drilling ...................................................................................... 56 11.3.4. Piedra Labrada Area ......................................................................................................... 57 11.3.4.1. Historic Drilling ............................................................................................................. 57 11.3.4.2. Piedra Labrada Area – Recent Drilling ......................................................................... 57 12.0 Sampling Method and Approach ......................................................................................... 57 12.1. Historical surface samples................................................................................................ 57 12.2. Historical drill samples ..................................................................................................... 57 12.3. Recent surface samples .................................................................................................... 58 12.4. Recent drill samples ......................................................................................................... 58 12.5. Cerro Cazador sampling conclusions .............................................................................. 59 13.0 Sample preparation, Analysis and Security ......................................................................... 59 13.1. Historical sampling ........................................................................................................... 59 13.2. Recent sampling ............................................................................................................... 59 Gold - Silver Resource Estimate for the La Josefina Project Page 3 14.0 Data verification ................................................................................................................... 60 14.1. Data Base audit ...............................................................................................................
Load more

Recommended publications
  • New Paleomagnetic Pole for the Upper Jurassic Chon
    Tectonophysics 750 (2019) 45–55 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto New paleomagnetic pole for the Upper Jurassic Chon Aike Formation of T southern Argentina (South America): Testing the tectonic stability of Patagonia with respect to South America, and implications to Middle Jurassic-Early Cretaceous true polar wander ⁎ Víctor Ruiz Gonzáleza, , Carla G. Puigdomenecha, Emiliano M. Rendaa, Bárbara Boltshausera, Rubén Somozaa, Haroldo Vizána, Claudia B. Zaffaranab, Graeme K. Taylorc, Miguel Hallerd, Raúl Fernándeze a IGEBA, UBA – CONICET, Argentina b IIPG, UNRN – CONICET, Argentina c Plymouth University, United Kingdom d CENPAT, CONICET – UNPSJB, Argentina e INREMI, UNLP, Argentina ARTICLE INFO ABSTRACT Keywords: A paleomagnetic pole and a new Ar-Ar date of 156.08 ± 0.05 Ma are reported for the Chon Aike Formation, an Chon Aike Formation extensive plateau of ignimbrites, outcropping in the Deseado Massif (southern Patagonia, Argentina). The Deseado Massif geographic coordinates and statistical parameters for the paleomagnetic pole, validated by a reversal test, are: South America Lat. = 84.3° S, Long. = 191.3° E, A95 = 8.6°, K = 13.3, N = 23. This pole shows a complete coherence with Late Paleomagnetism Jurassic and Early to mid-Cretaceous poles of South America, obtained exclusively from igneous rocks, avoiding Apparent polar wander path any potential inclination shallowing. It is suggested that; a) southern Patagonia was an integral part of South America in the Late Jurassic; b) any reported vertical axis tectonic rotations must pre-date the Late Jurassic in this region; c) according to updated paleomagnetic data from igneous rocks, South America had very limited latitudinal drift between about 160 and 140 Ma; and, therefore, d) its apparent polar wander (APW) path, when compared with global apparent polar wander paths, does not support a large global shift or true polar wander (TPW) between 160 and 140 Ma.
    [Show full text]
  • The Origin and Early Evolution of Dinosaurs
    Biol. Rev. (2010), 85, pp. 55–110. 55 doi:10.1111/j.1469-185X.2009.00094.x The origin and early evolution of dinosaurs Max C. Langer1∗,MartinD.Ezcurra2, Jonathas S. Bittencourt1 and Fernando E. Novas2,3 1Departamento de Biologia, FFCLRP, Universidade de S˜ao Paulo; Av. Bandeirantes 3900, Ribeir˜ao Preto-SP, Brazil 2Laboratorio de Anatomia Comparada y Evoluci´on de los Vertebrados, Museo Argentino de Ciencias Naturales ‘‘Bernardino Rivadavia’’, Avda. Angel Gallardo 470, Cdad. de Buenos Aires, Argentina 3CONICET (Consejo Nacional de Investigaciones Cient´ıficas y T´ecnicas); Avda. Rivadavia 1917 - Cdad. de Buenos Aires, Argentina (Received 28 November 2008; revised 09 July 2009; accepted 14 July 2009) ABSTRACT The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks (approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea. The better known of these are Herrerasaurus ischigualastensis, Pisanosaurus mertii, Eoraptor lunensis,andPanphagia protos from the Ischigualasto Formation, Argentina, and Staurikosaurus pricei and Saturnalia tupiniquim from the Santa Maria Formation, Brazil. No uncontroversial dinosaur body fossils are known from older strata, but the Middle Triassic origin of the lineage may be inferred from both the footprint record and its sister-group relation to Ladinian basal dinosauromorphs. These include the typical Marasuchus lilloensis, more basal forms such as Lagerpeton and Dromomeron, as well as silesaurids: a possibly monophyletic group composed of Mid-Late Triassic forms that may represent immediate sister taxa to dinosaurs. The first phylogenetic definition to fit the current understanding of Dinosauria as a node-based taxon solely composed of mutually exclusive Saurischia and Ornithischia was given as ‘‘all descendants of the most recent common ancestor of birds and Triceratops’’.
    [Show full text]
  • Geochemical Characteristics of the Infilling of Ground Wedges at Puerto Deseado (Santa Cruz, Argentina): Palaeoenvironmental and Chronological Implications
    Andean Geology ISSN: 0718-7092 ISSN: 0718-7106 [email protected] Servicio Nacional de Geología y Minería Chile Geochemical characteristics of the infilling of ground wedges at Puerto Deseado (Santa Cruz, Argentina): palaeoenvironmental and chronological implications Zanchetta, Giovanni; Ribolini, Adriano; Ferrari, Matteo; Bini, Monica; Isola, Ilaria; Lezzerini, Marco; Baroni, Carlo; Salvatore, Maria Cristina; Pappalardo, Marta; Fucks, Enrique; Boretto, Gabriella Geochemical characteristics of the infilling of ground wedges at Puerto Deseado (Santa Cruz, Argentina): palaeoenvironmental and chronological implications Andean Geology, vol. 45, no. 2, 2018 Servicio Nacional de Geología y Minería, Chile Available in: https://www.redalyc.org/articulo.oa?id=173955659002 DOI: https://doi.org/10.5027/andgeoV45n2-3070 PDF generated from XML JATS4R by Redalyc Project academic non-profit, developed under the open access initiative Andean Geology, 2018, vol. 45, no. 2, ISSN: 0718-7092 0718-7106 Artículos de Investigación Geochemical characteristics of the infilling of ground wedges at Puerto Deseado (Santa Cruz, Argentina): palaeoenvironmental and chronological implications Características geoquímicas de las cuñas de hielo en Puerto Deseado (Santa Cruz, Argentina): implicancias paleoambientales y cronológicas Giovanni Zanchetta DOI: https://doi.org/10.5027/andgeoV45n2-3070 Istituto Nazionale Geofisica e Vulcanologia Roma, Italia Redalyc: https://www.redalyc.org/articulo.oa? [email protected] id=173955659002 Adriano Ribolini University
    [Show full text]
  • Download Download
    ISSN 2683-9288 Science Reviews Volume 1 Number 1 from the end of the world December 2019 Susana Fedrano - “El ala” (1991) Science Reviews from the end of the world Science Reviews - from the end of the world is a quaterly publication that aims at providing authoritative reviews on hot research topics developed mainly by scientists that carry out their work far away from the main centers of science. Its research reviews are short, concise, critical and easy-reading articles describing the state of the art on a chosen hot topic, with focus on the research carried out by the authors of the article. These articles are commissioned by invitation and are accessible not only to hardcore specialists, but also to a wider readership of researchers interested in learning about the state-of-the-art in the reviewed subject. The reviews cover all fields of science and are written exclusively in English. They are refereed by peers of international prestige and the evaluation process follows standard international procedures. Centro de Estudios sobre Ciencia, Desarrollo y Educación Superior 538 Pueyrredón Av. - 2° C – Second building Buenos Aires, Argentina - C1032ABS (54 11) 4963-7878/8811 [email protected] www.scirevfew.net Vol. 1, No. 1 December 2019 AUTHORITIES AAPC President Science Reviews Susana Hernández from the end of the world Centro REDES President María Elina Estébanez Table of Contents EDITORIAL COMMITTEE EDITORIAL Editor-in-Chief An editorial anomaly 4 Miguel A. Blesa Miguel A. Blesa Co-Editors IN THIS ISSUE Daniel Cardinali (Medicine) List of authors Vol. 1, No. 1 Diego de Mendoza (Biochemistry 5 and Molecular Biology) Fabio Doctorovich (Chemistry) ARTICLES Esteban G.
    [Show full text]
  • ARC Centre of Excellence in Ore Deposits
    Università degli Studi di Padova University of Tasmania DIPARTIMENTO DI GEOSCIENZE CODES - ARC Centre of Excellence in Ore Deposits ________________________________________________________________ SCUOLA DI DOTTORATO DI RICERCA IN: SCIENZE DELLA TERRA CICLO XXVI Jurassic magmatism in Patagonia, Mauritania and Mali: Examples of silicic and basaltic Large Igneous Provinces Direttore della Scuola: Ch.mo Prof. Massimiliano Zattin Supervisore: Ch.mo Prof. Andrea Marzoli Co-supervisore: Ch.mo Prof. Vadim Kamenetsky Dottorando: Lina Maria Serrano Duran ABSTRACT At the end of the Triassic and during Jurassic times, the Central Atlantic Magmatic Province (CAMP) with a dominant mafic composition, and the mainly felsic Patagonian Province (PA) were formed in the context of Pangea break-up. CAMP basaltic to basaltic-andesitic dykes and sills from Hank and Hodh, in Mauritania, and Kaarta, in Mali, were emplaced at ca. 197 Ma yielding a signature defined by low to high TiO2-values (0.39 - 2.29 wt.%), Nb-Ta troughs, Pb spikes and enriched Nd-Sr-Pb 143 144 87 86 207 204 compositions ( Nd/ Nd201Ma: 0.51224 - 0.51241, Sr/ Sr201Ma: 0.70572 - 0.70795, Pb/ Pb201Ma: 208 204 206 204 15.61 – 15.68 Pb/ Pb201Ma: 38.44 – 38.07 and Pb/ Pb201Ma: 18.11 – 18.48). Nb/U ratios (= 12 – 15), tracers of recycled material, combined with enriched isotopic signatures suggest the contribution of continental crust in the origin of these magmas. Differences in the ratios of La/Yb of the whole set suggest the existence of an enriched group in Kaarta (La/YbN>4.3) coupled to increasing ratios of Nb/Zr and Th/Y, probably reflecting lower degrees of partial melting in these rocks.
    [Show full text]
  • The Mesozoic Megafossil Genus Linguifolium Arber 1917
    Acta Palaeobotanica 55(2): 123–147, 2015 DOI: 10.1515/acpa-2015-0009 The Mesozoic megafossil genus Linguifolium Arber 1917 GARY A. PATTEMORE1, JOHN F. RIGBY 2 and GEOFFREY PLAYFORD 3 1 School of Earth Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia; e-mail: [email protected] 2 School of Earth, Environmental and Biological Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia; e-mail: [email protected] 3 School of Earth Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia; e-mail: [email protected] Received 24 April 2015; accepted for publication 3 September 2015 ABSTRACT. The plant megafossil genus Linguifolium Arber 1917 is chiefly known from the Middle and Upper Triassic of Gondwana. The range of Linguifolium extended beyond Gondwana by the Late Triassic, persisting there through the earliest Jurassic (Hettangian). The parent plants probably grew in a well-watered, canopied environment. Diagnoses of the genus and four of its species – Linguifolium tenison-woodsii (Shirley 1898) Retallack 1980, L. waitakiense Bell in Bell et al. 1956, L. parvum Holmes & Anderson in Holmes et al. 2010, and L. steinmannii (Solms-Laubach 1899) Arber 1917 – are emended with particular reference to venation and leaf morphology; consequently, the stratigraphic ranges of the species have been more precisely defined. Coalescent venation has previously been reported in some species of Linguifolium and is identified in new material described herein. Although the vast majority of specimens assigned to the genus are from the Upper Triassic, none shows coalescent venation. This character is entirely restricted to the Middle Triassic, in particu- lar to two species: L.
    [Show full text]
  • 40Ar/39Ar Dating of the Jurassic Volcanic Province Of
    Reprinted from EARTH AND PLANETARY SCIENCE LETTERS Earth and Planetary Science Letters 172 1999) 83-96 40Ar/39Ardating of the Jurassic volcanic province of Patagonia: migrating magmatism related to Gondwana break-up and subduction a, G. Féraud a+, V. Alric ab, M Fomari H. Bertrand ', M. Haller a UMR 6526 Géoscience Azul; CNRS-IRD, Université d Nice-Sophia Antipolis, Parc Valrose, 06108 Nice Cedex 02, France ' Universidad Nacional de la Patagonia JSan Juan Bosco, Puerto Madryn, Cliubut, Argeritina Laboratoire de Géologie, UMR 5570 CNRS, Ecole Normale Supérieure de Lyon et UCBL, 46 Allée d'Italie, 69364 Lyon Cedex 07, France Received 20 January 1999; revised version received 24 June 1999; accepted 29 July 1999 EARTH AND PLANETARY SCIENCE LETTERS EDITORS Dr. F. Albarède Prof. A.N. Halliday Prof. R.J. O’Connel1 Ecole Normale SupCrieure de Lyon Institute for Isotope Geology and Mineral Department of Earth and Planetary Sciences 46 Allée d’Italie Resources Harvard University 69364 Lyon Cedex 07, France Department of Earth Sciences 20 Oxford Street, Tel.: (33) 4727-28414 ETH Zentrum, Sonneggstrasse 5, NO Cambridge, MA 02138, USA Fax: (33) 4727-28080 CH-8092 Zürich, Switzerland Tel.: (1) (617) 495-2532 E-mail [email protected] Tel.: (41) 1 632-7525/Fax: (41) 1 632-11.79 Fax: (1) (617) 495-8834 E-mail: halliday [email protected] , E-mail: [email protected] Dr. A. Cazenave Prof. C. Langmuir Dr. R. van der Voo LEGOS - CNESKNRS Lamont-Doherty Earth Observatory Department of Geological Sciences 18, Avenue Edouard Belin Palisades, NY 10964, USA University of Michigan, F-31401 Toulouse Cedex 4, France Tel.: (1) (914) 365-8657 2534 C.C.
    [Show full text]
  • May 2020 Presentation
    Investor Presentation May 2020 Cautionary and Forward Looking Statement This document has been prepared by Patagonia Gold Corp. (“Patagonia Gold” or, the “Company”) for evaluation of the Company by the recipient. The information contained in this presentation is derived from estimates made by the Company, information that has been provided to the Company by other parties, and otherwise publicly available information concerning the Company and does not purport to be all-inclusive or to contain all the information that an investor may desire to have in evaluating whether or not to make an investment in the Company. It is not intended to be relied upon as advice to investors or potential investors and does not take into account the investment objectives, financial situation or needs of any particular investor. No person has been authorized to give any information or make any representations other than those contained in this presentation and, if given and/or made, such information or representations must not be relied upon as having been so authorized. In furnishing this presentation, the Company does not undertake or agree to any obligation to provide the attendees with access to any additional information or to update this presentation or to correct any inaccuracies in, or omissions from, this presentation that may become apparent. The contents of this presentation are not to be construed as legal, financial or tax advice. Each prospective investor should contact his, her or its own legal adviser, independent financial adviser or tax adviser for legal, financial or tax advice. No securities commission or regulatory authority has reviewed the accuracy or adequacy of the information presented.
    [Show full text]
  • This Article Appeared in a Journal Published by Elsevier. the Attached
    This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy Tectonophysics 460 (2008) 178–185 Contents lists available at ScienceDirect Tectonophysics journal homepage: www.elsevier.com/locate/tecto Tectonic rotations in the Deseado Massif, southern Patagonia, during the breakup of Western Gondwana Rubén Somoza a,b,⁎, Haroldo Vizán a,b, Graeme K. Taylor c a CONICET, Argentina b Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, Argentina c School of Earth, Ocean and Environmental Sciences, University of Plymouth, UK article info abstract Article history: Paleomagnetic investigation in the Deseado Massif, southern Patagonia, suggests that Triassic sedimentary Received 13 May 2008 rocks carry a latest Triassic to Jurassic remagnetization and that earliest Jurassic plutonic complexes carry a Received in revised form 4 August 2008 reversed polarity magnetization of thermoremanent origin. Despite uncertainties in the timing of the Accepted 5 August 2008 observed remanence in the Triassic rocks and the lack of paleohorizontal control on the plutonic complexes, Available online 15 August 2008 comparison of the derived pole positions with the most reliable Late Triassic–Jurassic apparent polar wander Keywords: paths indicates that the study areas underwent significant clockwise vertical-axis rotation.
    [Show full text]
  • Raga 63.4 Corregida.Qxp
    Revista de la Asociación Geológica Argentina 63 (4): 665 - 681 (2008) 665 LOS DEPÓSITOS DE ORO Y PLATA VINCULADOS AL MAGMATISMO JURÁSICO DE LA PATAGONIA: REVISIÓN Y PERSPECTIVAS PARA LA EXPLORACIÓN Raúl R. FERNÁNDEZ1,2, Adriana BLESA1,3,a, Pilar MOREIRA1,3, Horacio ECHEVESTE1,2, Karina MYKIETIUK1,3,b, Pablo ANDRADA DE PALOMERA4 y Mario TESSONE1 1 Instituto de Recursos Minerales (INREMI). Facultad de Ciencias Naturales y Museo (UNLP-CICBA) La Plata. Email: [email protected] 2 Comisión de Investigaciones Científicas de la provincia de Buenos Aires (CICBA) 3 Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) 4 Fomento Minero de Santa Cruz (FOMICRUZ S.E.). Río Gallegos, Santa Cruz. a Actualmente RTZ Argentina b Actualmente Medanitos SA RESUMEN La importancia del magmatismo jurásico de la Patagonia con relación a mineralizaciones de Au-Ag, ha sido reconocida desde hace menos de 20 años y al presente se definieron recursos por más de 700 t de Au equivalente contenido, en tres depósitos de clase mundial (>100 t AuEq contenido), algunos depósitos menores y numerosos prospectos en exploración. Se alojan en rocas volcánicas y volcano-sedimentarias jurásicas (o más antiguas), silíceas y mesosilíceas generadas en ambientes de arco y retro-arco de las regiones andina y extra-andina. Por sus características mineralógicas, texturales y geoquímicas corresponden a depósitos epitermales asociados principalmente a la paragénesis cuarzo + calcita + adularia + illita que acompañan a los depósitos de sulfuración baja e intermedia. Por su contenido metálico se dividieron en: a) Au-Ag y Ag>Au, b) polimetálicos con Ag-Au o sólo Ag, y c) polimetálicos complejos con Ag-Au.
    [Show full text]
  • 1-S2.0-S1342937X20303221-Main.Pdf (13.28Mb)
    Gondwana Research 91 (2021) 205–230 Contents lists available at ScienceDirect Gondwana Research journal homepage: www.elsevier.com/locate/gr Provenance and tectonic setting of the Paleozoic Tamatán Group, NE Mexico: Implications for the closure of the Rheic Ocean Juan Moisés Casas-Peña a, Juan Alonso Ramírez-Fernández b, Fernando Velasco-Tapia b, Eduardo Alejandro Alemán-Gallardo a, Carita Augustsson c,BodoWeberd, Dirk Frei e,UweJenchenb,⁎ a Programa de Posgrado de la Facultad de Ciencias de la Tierra, Universidad Autónoma de Nuevo León Facultad de Ciencias de la Tierra, Carretera a Cerro Prieto Km 8, Ex. Hacienda de Guadalupe, Linares, N.L. 67700, Mexico b Facultad de Ciencias de la Tierra, Universidad Autónoma de Nuevo León, Carretera a Cerro Prieto Km 8, Ex. Hacienda de Guadalupe, Linares, N.L. 67700, Mexico c Faculty of Science and Technology, Department of Energy Resources, Universitetet i Stavanger, Stavanger 4036, Norway d Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Mexico e Department of Earth Sciences, University of the Western Cape, Cape Town, South Africa article info abstract Article history: The Huizachal–Peregrina Anticlinorium in northeastern Mexico comprises a wide variety of Precambrian Received 8 June 2020 and Paleozoic basement units. In this work, Silurian-to-Permian unmetamorphosed siliciclastic succes- Received in revised form 2 November 2020 sions (i.e., Cañón de Caballeros, Vicente Guerrero, Del Monte, and Guacamaya formations) forming the Accepted 15 December 2020 Tamatán Group is described; the group overlies the Novillo metamorphic complex, which is the north- Available online 7 January 2021 ernmost exposed region of the Oaxaquia microcontinent.
    [Show full text]
  • 2010 Minerals Yearbook
    2010 Minerals Yearbook GOLD U.S. Department of the Interior October 2012 U.S. Geological Survey GOLD By Micheal W. George Domestic survey data and tables were prepared by Wanda G. Wooten, statistical assistant, and the world production table was prepared by Lisa D. Miller, international data coordinator. In 2010, domestic mine production of gold increased to end use of gold were jewelry and arts, 54%; dental and medical, 231,000 kilograms (kg), 4% more than that in 2009 (tables 1–2). 10%; electrical and electronics, 7%; and other, 29%. This marks the fi rst increase in 10 years, although production Refi ned bullion comprised 33% of U.S. gold imports and 77% was 37% lower than the historical high of 366,000 kg in of exports; the United States was a net exporter of 95,700 kg of 1998. In 2010, the value of domestic production increased to bullion in 2010 (tables 4, 6). The imports and exports of gold $9.13 billion, up 30% compared with that in 2009 because of bullion increased by 57% and 5%, respectively, from those in 2009. the increase in the price of gold and the increase in domestic The increases in imports mainly were from Canada and Mexico, production. It was the ninth straight year that the value had which provided almost 51% and 25%, respectively, of the refi ned increased. Gold recovery from the major mines in Nevada bullion imported. Imports of ores and concentrates increased by decreased because mining lower grade ore was more profi table 450% because of a substantial increase in imports from Mexico for with high gold price.
    [Show full text]