 | | Journal (article/letter/editorial) | | Molybdenite Mineralization at the El Teniente Cu-Mo Porphyry Deposit, Chile Edward T. Spencer,1,ā Jamie J...DivisiĆ³n El Teniente, Rancagua, Chile Abstract The El Teniente Cu-Mo porphyry deposit, Chile, is one...of diorite finger porphyries and the composite Teniente Dacite Porphyry. These units acted as effective...veins and breccias. These are abundant at shallow mine levels and show a close spatial relationship with...series of concentric faults associated with the Braden Breccia Pipe. Mineralization in this paragenetic |  | | 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...well-developed zonal Na and Ca from plagioclase. Sericite is the stable pattern of wall-rock alteration...alterationzonesis minerals are K-feldspar, biotite, sericite, quartz, typicallysharp,and may be due to mixing |  | | Journal (article/letter/editorial) | | distribution of Rb near porphyrycopperdepositsin Chile showthat: (a) Positive Rb anomaliesexist in rocks...mafic volcanic rocks, with minor chlorite and sericite. the massivesulfidebodymakingit difficultto deter-... The mineralized interval consistsof a rhyolite mine its size and shape. lapilli tuff to tuff brecciahavinga...tabulation of both zones. sericite,then into a zone of low chlorite and sericite Sample34 is in zone 3 but...Potossic El i 386 Alteration of Docite of i I 200 I ā¢ ?ā¢00 600 Porphyry I I 50 Teniente 100 |  | | Journal (article/letter/editorial) | | HydrothermalK-feldspar, Fe-Ti oxides, chlorite, sericite, and epidote show limited compositionalvariations...Granodiorite(Fig. 2), within which chlorite-sericiteand sericite-clayassemblages occur. The spatialcoincidence...Granodiorite. They include chloritesericiteand sericite-clayassemblages.The chloritesericitealterationis...Panguna. The nature of the about 1 cm in dialneter. mine intrusives and their relationshipto both contem...contactmetamorphiczone in the Panguna Andesite chlorite-sericite alteration conceivably developed (500-600 m of |  | | Journal (article/letter/editorial) | | zonesenrichedin K-bearingminerals(Kfeldspar, biotite, sericite) and Ca-bearingminerals granitoid pluton of Triassic...granodioriteto quartz monzonite of the alteration(sericite+ K-feldspar- biotite----chlorite) Bethsaidaphase(Fig..., 1972). Hydrothermal alteration effectscomby sericite, kaolinire, and minor montmorillonite prise an...that passesout- (sericite-kaolinite), a later phaseof barren quartz, quartz-sericite,and Fro. 2. Generalized...the orebody, where intense argillicalteration(sericite-kaolinite-montmorillonite) is dominant. Rb levels |  | | Journal (article/letter/editorial) | | and hasa lower as a guide to ore at E1 Teniente (Braden), Chile [abs.]: K/Rb ratio relative to the original...substantialRb is leachedfrom the fragmentalrocks. If sericite,or other secondaryK minerals,forms from reactionof... and Billings, G. K., 1970,Rubidium: abundance Chile and produceenlargedtargetsfor mineral ex- Heier...coppersulfidesand secalteration, southern Atacama desert, Chile: Inst. Mining ondary sulfide enrichment: EcoN. Gā¢...: Ecoa. GEOId., v. 31, p. 331-354. Brouillan, Province of Quebec,Canada: Jour. Geochem. Brown, P. E. |  | | Book | | Orogen . 3 Ā¢ Radiometric Ages Near El Salvador and Potteriics, Chile . 4 Ā¢ Section Through Arequipa, Peru...Through Potrerillos, Chile . ; 6 Ā¢ Potash Index of Igneous Rocks, Atacama Rego Chile : 7 Ā¢ Michiquillay...Geology (Peru) . 8 Ā© Structure at Chuquicamata, Chile . 9 Ā¢ Surface Geologic Map, Michiquillay 10 Ā© Surface...Plutonic Belt, ies 27 @ Geology of the Kobuk-Koyukuk Province (Alaska). 28 Ā© Interior Belt (Alaska). 3 ; ,...: tbe ge genes ie a Structure Visible in Gurr at El Nie : Structural Outline at Copper Basin. ; 48 Ā¢ |  | | Journal (article/letter/editorial) | | soon progressed to shallow depth, resulting in a mine. The numbers of mines and intensity of ACCEPTED...colonialism, modern economic booms (Belich, 2009). Active mine numbers and sizes skyrocketed during two World Wars...rapidly growing number of mineral discoveries and mine establishment was partly driven by the discovery...of conquests and non-military acquisitions. But mine importance and fame did not necessarily correspond...obsolete (for example, recent reserves of a mature mine only, or IP past production for a period of time) |  | | Report (issue) | | performed by the author and by F. Elsass and A. H. El Bazli. Copper, lead, zinc, gold, silver, nickel,... G. I. Seiner (USGS Computer Section), and A. H. El Bazli (USGS technician) is gratefully acknowledged...individual multiphase intrusions, constitute a tin province in which tin and niobium deposits are confined...plagioclase and the formation of potassium feldspar, sericite, or kaolinite. A study of the distribution of...studying three major porphyry copper deposits in Chile, Armbrust and others (1977) concluded that rocks |  | | 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...consist entirely of seconĀ dary minerals s.uch as sericite, carbonate and chlorĀ ite. One dyke ,vhich resembles...the adamellite, it shows patchy alteration to sericite. Alteration products of the orthoclase microperthite |  | | 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 |
|
