 | | Journal (article/letter/editorial) | | of Miocene porphyry systems in the Cajamarca district, northern Peru Received: 29 September 2004 / Accepted:...deposits located in the auriferous Cajamarca district of northern Peru. The El Galeno deposit (486 Mt at...(potassic) alteration was associated with pyrite and chalcopyrite mineralisation. A quartz–magnetite assemblage...g/t Au and 0.8% Cu) and are characterised by chalcopyrite and pyrite mineralisation. The core of the deposit...Galeno-Michiquillay) and Au-rich (Minas Conga) deposits in the Cajamarca region are of similar age (early–middle |  | | Journal (article/letter/editorial) | | Yanacocha Mining District, Cajamarca, Peru LEWIS TEAL1,† AND ALBERTO BENAVIDES2 1Newmont 2Minas Peru Ltd., Calle...Isidro, Lima, Peru Buenaventura S.A.A., Ave. Carlos Villaran 790, Urb. Santa Catalina, Lima, Peru Abstract...Abstract Discovery and recognition of the Yanacocha district as a belt of northeast-trending, near-surface...Compañia de Minas Buenaventura and CEDIMIN (BRGM). Open-pit mining began in the district in late 1993...ounce life-of-mine. Reported 2008 end-of-year oxide reserves within the operating district are >13 Moz |  | | Journal (article/letter/editorial) | | Associated Hydrothermal Gold Deposits at Yanacocha, Peru** ANTHONY A. LONGO,†,1,* JOHN H. DILLES,2 ANITA...Yanacocha and Newmont Mining Corporation, Cajamarca, Peru 2Department 3College of Geosciences, Oregon...Miocene volcanic rocks in the Yanacocha district, northern Peru (lat. 6°59'30" S, long. 78°30'45" W). We...relation to the gold ores on the basis of new district-scale geologic mapping, 69 40Ar/39Ar ages on igneous...Colorado Pyroclastics erupted in the center of the district and include the hornblende- and biotite-bearing |
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