 | | Journal (article/letter/editorial) | | deposits of the Neoproterozoic Mara Rosa magmatic arc, central Brazil Claudinei G. de Oliveira *, Márcio...Universidade de Brası́lia, Brası́lia-DF, 70910.900, Brazil Received 18 August 2003; accepted 24 April 2004...the Neoproterozoic Goiás Magmatic Arc, central Brazil, dates back to the beginning of the 1970s. The...Neoproterozoic juvenile crust, the Arenópolis and the Mara Rosa arcs, are identified. They lie in the southern...values between + 3.0 and + 4.6. In the Chapada – Mara Rosa area, the supracrustal rocks form three individual |  | e Silva, Jonas Mota, Ferreira Filho, Cesar Fonseca, Bühn, Bernhard, Dantas, Elton Luiz (2011) Geology, petrology and geochemistry of the “Americano do Brasil” layered intrusion, central Brazil, and its Ni–Cu sulfide deposits. Mineralium Deposita, 46 (1) 57-90 doi:10.1007/s00126-010-0312-9 | Journal (article/letter/editorial) | | “Americano do Brasil” layered intrusion, central Brazil, and its Ni–Cu sulfide deposits Jonas Mota e Silva...during the Brasiliano/Pan-African Orogenic Cycle in Brazil. The medium-sized ABC consists of interlayered...Universidade de Brasília, Brasília, DF 70910-900, Brazil e-mail: cesarf@unb.br J. M. e Silva e-mail: jonas...Synorogenic layered intrusion . Mafic–ultramafic . Brazil . Americano do Brasil Introduction Magmatic Ni–Cu...“Americano do Brasil” Complex (ABC) in central Brazil is hosted by a Neoproterozoic synorogenic mafic– |  | | Report (volume) | | Minas Gerais Brazil GEOLOGICAL SURVEY BULLETIN 964-C Mica Deposits in Minas Gerais Brazil By W. T....M. BARBOSA and RESK FRAYHA, DIVISSO DE FOMENTO, BRAZIL GEOLOGIC INVESTIGATIONS IN THE AMERICAN REPUBLICS...da Produgao Mineral, Ministerio da Agricultura, Brazil, under the auspices of the Interdepartmental Committee...__________-___---_____---_-________ Exports of sheet mica from Brazil, 1900-1945-___-__-_______----______ General statement...273 274 274 275 275 276 276 CONTENTS V Page Mine-crude mica and sheet-mica production analyses-__________________ |  | | Report (volume) | | ________________________________________ Los Mantos mine--_.-___-_--_____-____-_____-_-_---_____-_Champurria...topographic map of the Punitaqui quicksilver Page district, Coquimbo, Chile___________--____--_________ In...pocket 21. Geologic map of the 170 level, Los Mantos mine, Punitaqui, Chile____________________________________________...pocket 22. Geologic map of the 250 level, Los Mantos mine, Punitaqui, Chile___________________________________________...Mantos mine, Punitaqui, Chile. _____ In pocket 24. Geologic map of the 330 adit, Los Mantos mine, Punitaqui |  | LaFayette, Gabrielle N., Knappett, Peter S.K., Li, Yanmei, Loza-Aguirre, Isidro, Polizzotto, Matthew L. (2020) Geogenic sources and chemical controls on fluoride release to groundwater in the Independence Basin, Mexico. Applied Geochemistry, 123. 104787pp. doi:10.1016/j.apgeochem.2020.104787 | Journal (article/letter/editorial) | | 1996; Shepherd, 2018; Valdez-Moreno et al., 1998). Biotite, hornblende, and apatite minerals have been pro...sources and sinks of F− in IB aquifer materials. Biotite, horn blende, and apatite minerals have been proposed...for the large fluorspar deposit in Las Cuevas, a mine located northeast of San Luis de la Paz (Gonzalex-Pertida...Fe)AlSi3 O10 (OH, F)2 + 7 H2 O + 4 CO2 → (Biotite) 2+ 4.2. Mechanisms of fluoride release from...weathering, F− is preferen tially released from biotite, hornblende, and apatite because it is more stable |  | | Report (volume) | | Manganese deposits of the Serra do Navio district, Territory of Amapd, Brazil, by John Van N. Dorr 2d, Charles...___________ (C) Mica deposits in Minas Gerais, Brazil, by W. T. Pecora, M. R. Klepper, and D. M. Larrabee...Geology and mineral resources of the Maimon-Hatillo district, Dominican Republic, by A. H. Koschmann and Mackenzie...11. Plan and sections of the lower adits, Quindio mine, municipio of Cajamarca, Tolima, Colombia._____________________In...Map and sections of the Alumbral quartz crystal mine, municipio of Muzo, Boyacd, "Colombia. ______ _____________ |  | | Journal (issue) | | .......................... 454 DAY THE BILBAO MINE, ZACATECAS, MEXICO. By Lotti-s W. Van ce ....................................491 TES ON THE ECTON MINE, MONT. CO., PENN. By A. J. Boucot ........492 GILLETTE...the state of Zacatecas to investigate the Bilbao Mine. We had been told that lichi- some very interesting...hotel well which taplOW ped some of the ancient mine workings :; below. Ao electric pump lifted the water...usual bandstand. While Earl went to look up the mine office I sat on a bench in the plaza soaking up |  | | Report (issue) | | arbitrary 500-m limit may combine deposits within a district (e.g. Quemont-Horne), or subdivide a large deposit...BARITE BERTHIERITE BEUDANTITE BISMUTH BIEBERITE BIOTITE BISMUTH INITE BORNITE BOULANGERITE BOURNONITE BROCHANTITE...GUILLERMO-SIERRA SAN MATED SAN PEDRO SAN PLATON SAN TELMO SANTA ROSA SCHIST LAKE SELCO-SCOTT SHA SHASTA KING SHUNSBY...Bandgan, Kimri and Jadino, Raskoh Range, Chagai district, west Pakistan, in Symposium on mining geology...1953, Geology and ore deposits of the Afterthought mine, Shasta County, California: California Division |  | | Report (issue) | | thesis entitled “The Surface Geology of the Mining District of Huautla, Morelos” which he defended that year...Engineer with Honors. Rafael joined the Southern District of Pemex in 1962 as an assistant field geologist...superintendent of geological operations for the Southern District of Pemex where he actively participated in the...the Eocene. Isotopic 40Ar/39Ar in hornblende and biotite shows that the emplacement and cooling of the magma...Internacional Limited, 2004). Accessory minerals include biotite, muscovite, chlorite, and tourmaline, which are |
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