 | | Journal (article/letter/editorial) | | the Chilean porphyry copperdepositsin the E1 Teniente (Braden), Rio Blanco, and Los Bronces (Disputada)...following conclusions, thoughbasedon the study at E1 Teniente, Rio Blanco, and Los Bronces,may alsobe applicableto...distributionof Rb in rocksfroin the leachedcapping at E1 Teniente. Due to this immobility of Rb, weathering of the...locations of E1 Teniente, Rio Blanco, and Los Bronces mines. Modified from Mapa Geo16gicade Chile, Instituto...BRECCIA PIPE I Diamond drill hole. DACITEPORPHYRY Mine workings. QUARTZDIORITE Location of sections |  | | Journal (article/letter/editorial) | | distribution of Rb near porphyrycopperdepositsin Chile showthat: (a) Positive Rb anomaliesexist in rocks... The mineralized interval consistsof a rhyolite mine its size and shape. lapilli tuff to tuff brecciahavinga...Potossic El i 386 Alteration of Docite of i I 200 I • ?•00 600 Porphyry I I 50 Teniente 100 ...is leachedfrom the adjacentwall rocks. sericite,calcite,epidote,apatite,and pyrite. In zone The watershave...the K/Rb ra- the rocks. Discussion Senecaand El Teniente deposit All of the 19 samplesfrom the Senecadepositcontain |  | | Journal (article/letter/editorial) | | Panguna. The nature of the about 1 cm in dialneter. mine intrusives and their relationshipto both contem...grouped togetheras late, postperiod of intrusionin the mine region is considered tive assemblages K-silicate...selvagesco•nprisefrom most of total rock near •nine mine porphyries porphyriesto < 1% near outer limit of...when present. Kaverong Quartz Area adjacent to mine porphyries Biotite-chlorite-K-feldspar-magnetite-anhydrite...partly replacedby biotite, K-feldspar, seNcite,calcite, or albite). Whole Biotite-chlorite-K-feldspar |  | | Journal (article/letter/editorial) | | depositsin brecciapipesat Cananaea,Mexico; E1 Teniente (Braden), Chile. Group5. Massivesulfidedeposits, commonlyconcordant...NORANDA,QUa., 20th Nov., 1,o61 AN OCCURRENCE CALCITE OF VEINS, PHILIP VIOLARITE BENTON J. STERLING |  | | Journal (article/letter/editorial) | | pluton of Triassic age, ranging in com(epidote,calcite,montmorillonite). Of greaterim- positionfrom dioriteat...respectively, in altered andesitesassociatedwith the Braden porphyry copperdeposit. Althoughthe BethlehemJA..., 1971,Rubidiumas a guideto ore at E1 Teniente (Braden), Chile [abs.]: ECON.Gr.oI.., v. 66, p. 977. Brabec...Contributionsto the studyof volcanicand plutonicrocks of Chile: Unpub. Ph.D. thesis,University of Paris, 195 p |  | | Book | | Orogen . 3 ¢ Radiometric Ages Near El Salvador and Potteriics, Chile . 4 ¢ Section Through Arequipa, Peru...Through Potrerillos, Chile . ; 6 ¢ Potash Index of Igneous Rocks, Atacama Rego Chile : 7 ¢ Michiquillay...Geology (Peru) . 8 © Structure at Chuquicamata, Chile . 9 ¢ Surface Geologic Map, Michiquillay 10 © Surface...Plutonic Belt, ies 27 @ Geology of the Kobuk-Koyukuk Province (Alaska). 28 © Interior Belt (Alaska). 3 ; ,...: tbe ge genes ie a Structure Visible in Gurr at El Nie : Structural Outline at Copper Basin. ; 48 ¢ |  | | Report (issue) | | Geochemical and geophysical investigations around Garras Mine, near Truro. Cornwall 3 4 Molybdenite mineralisation...associated with the Skiddaw Granite near Carrock Mine, Cumbria 8 Investigation of stratiform sulphide...Scotland 38 10 Geophysical surveys around Talnotry mine, Kirkcudbrightshire, Scotland Geophysical evidence...and hornblende are partially chloritised, and calcite and cpidote arc occasionally present. i\ medium... and the development of white mica, chlorite, calcite and kaolinite at the expense of higher temperature |  | | Book | | disseminating the information, the mine geologists and mine managers who have made the mine visits a rewarding experience...concentration required to achieve the break-even point for a mine in terms of revenue and costs. Any detailed exploration...epochs. Following Tumeaure (1955), a metallogenic province may be defined as a mineralized area or region...The size of a metallogenic province can be as large as the Superior Province (Canadian Shield) or as small...as the Upper Michigan Peninsula native copper province. Similarly, a metallogenic epoch can be as broad |  | | Book | | phosphate ion (PO43-), then carbonate minerals such as calcite (CaCO 3, the main mineral in limestone) or dolomite... Apatite Ca 5 (PO 4 )J(OH,F) Pyrite FeS 2 Calcite CaCO 3 Magnetite Fe3 O4 Contains phosphorus...pyrope Lamproite Olivine, pyroxene Carbonatite* Calcite, other carbonates Pyrope, phlogopite, diamond...grains are cemented by agents such as silica or calcite. Often sandstone has high permeability that allows...commonly by precipitation of calcite from seawater. Mechanical accumulations of calcite-shell secreting organisms |
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