 | | Journal (article/letter/editorial) | | Oligocene-Miocene Crucero Supergroup of the southern Peru Inner Arc domain provide a previously unavailable...zone separating the sites of anatexis in southern Peru and northern Bolivia. This is inferred to represent...subdivisions of the Andean orogenic belt in southern Peru and contiguous northern Bolivia. The approximate...westerly of these constitutes the 6000- to 8000-m-deep Peru-Chile trench and the forearc slope (Llanuras Costaneras)...western Bolivia, but narrows markedly in southeastern Peru, where an extensive 4000- to 5000-m-high mountainous |  | | Journal (article/letter/editorial) | | the Cayconi volcanic field, Cordillera de Carabaya, SE Peru Hamish A. Sandeman *, Alan H. Clark Department...The Cayconi district of the Cordillera de Carabaya, SE Peru, exposes a remnant of an upper Oligocene –...cordierite, plagioclase, sanidine, ilmenite and apatite, respectively exhibit mineralogical and geochemical...in the Oligo-Miocene rocks of the Cordillera de Carabaya, suggesting that the S-type rocks in this area...2004 Elsevier B.V. All rights reserved. Keywords: Peru; Inner arc; S-type magmas; Potassic mafic magmas; |  | | Journal (article/letter/editorial) | | Cordierite±Biotite Rhyodacite, Valle Ninahuisa, Puno, SE Peru: Petrological Evidence for Hybridization of...in the Central Andean Inner Arc of southeastern Peru, is interpreted as a pristine analogue of a Lachlan-type...quartz and sanidine, and accessory sillimanite, apatite, zircon, ilmenite and monazite. Both plagioclase...hsandema@nrcan.gc.ca that of the subsequent, 7^17 Ma, Macusani Formation ash-flows, and other strongly peraluminous...granites and rhyolites, including the well-known Macusani rhyolites. Moreover, a nearby, closely allied |  | Kontak, D. J., Clark, Alan H., Farrar, E., Archibald, D. A., Baadsgaard, H. (1987) Geochronological data for Tertiary granites of the Southeast Peru segment of the Central Andean tin belt. Economic Geology, 82 (6) 1611-1618 doi:10.2113/gsecongeo.82.6.1611 | Journal (article/letter/editorial) | | CENTRAL GRANITES ANDEAN OF THE SOUTHEAST TIN BELT PERU D. J. KONTAK,ø A. H. CLARK,E. FARRAR,D. A. ARCHIBALD...intrusions in the Cordillera and Precordillera de Carabaya(Fig. 2), in additionto the first Rb-Sr iso- shipsare...respectto the physiographic provincesof southeastern Peru. The arealdistributionof Tertiary peraluminous ...Dated Intrusions, Cordillera Oriental, Southeastern Peru Lat øS;long øW Form Petrography San Rafael ...with subroundedapex SE Macusani(1) 14ø7'; 70o23 14o2'; 70019'24" , SE Macusani(2) Cerro Corimpata Apparently |  | | Journal (article/letter/editorial) | | 1997 The Minastira peraluminous granite, Puno, southeastern Peru: a quenched, hypabyssal intrusion recording...fine-grained granitic rock in the Cordillera Oriental of SE Peru, has preserved textures indicative of a history...minor coarsegrained melt- and fluid-inclusion rich apatite, and possible cordierite (now a pseudomorphous...Minastira, Peru. Introduction THE Cordillera de Carabaya segment of the Cordillera Oriental of SE Peru (Fig... olivia 14 ~ Limbani Pluton 0' ~ Jurassic Macusani Syenite ~ Triassic Granites ~ Permian Mitu |  | Clark, Alan H., Farrar, Edward, Kontak, Daniel J., Langridge, Robert J., Arenas F., Mario J., France, Lynne J., McBride, Sandra L., Woodman, Priscilla L., Wasteneys, Hardolph A., Sandeman, Hamish A., Archibald, Douglas A. (1990) Geologic and geochronologic constraints on the metallogenic evolution of the Andes of southeastern Peru. Economic Geology, 85 (7) 1520-1583 doi:10.2113/gsecongeo.85.7.1520 | Journal (article/letter/editorial) | | MetallogenicEvolution of the Andes of Southeastern Peru ALANH. CLARK,EDWARDFARlIAR,DANIELJ. KONTAK,*ROBERT... GedlogoConsultor,Caminosdel Inca 698, Lima 33, Peru LYNNEJ. FRANCE,**SANDRA L. MCBRIDE,PRISCILLA L...post-Paleozoic metallogenicevolutionof southeastern Peru is clarifiedon the basisof the stratigraphic an...the UpperTriassicto LowerJurassic (190-225 Ma) Carabaya batholithin the Inner Arc; magmagenesisresultedfrom...contiguous centralAndeantransects, southeastern Peru differsmarkedlyfrom other areasof the countryin |  | | Journal (article/letter/editorial) | | Springer-Verlag1988 The Miocene-Pliocene Macusani Volcanics, SE Peru I. Mineralogy and magmatic evolution...Canada, 1470, Lima 13, Peru Abstract. The Miocene-Pliocene Macusani volcanics, SE Peru, outcrop in three...activity from 10 to 4 Ma in the Macusani field. The volcanics in the Macusani basin comprise crystal-rich...cordierite-type phases, hercynitic spinel, fluor-apatite, ilmenite, monazite, zircon, niobian-rutile) is...is essentially constant throughout the entire Macusani field. Two distinct generations of plagioclase |  | | Journal (article/letter/editorial) | | quartz and biotite, with minor magnetite and apatite from the hybrid magma. Sillimanite in the Coyaguayma...with SP characteristics are scarce in this vast province (Fig. 1), and the same is true for mafic magmas...Cordillera of Bolivia and Peru (Kari Kari ignimbrite, Schneider, 1987; Macusani volcanics, Pichavant et...Cenozoic volcanic rocks: 1 — Quenamari–Cayconi fields (Macusani ignimbrites; Revancha dyke; San Rafael pluton;...(2005), and Caffe et al. (2007). and monazite. Apatite is virtually absent, as are primary opaque minerals |  | | Journal (article/letter/editorial) | | Magma Mixing in the Antauta Subvolcanic Center, Peru: Implications for the Origin of Nelsonite and Iron...hypabyssal complex of the Picotani Group, Puno, southeastern Peru. Magma mixing generated intermediate, andesitic...rich in magnetite, ilmenite and/or rutile, and apatite, the so-called nelsonites (Watson, 1907; Watson...(1967) experiments in the system diorite-magnetite-apatite and Watson’s (1976) demonstration that phosphorus...and (H2O + P). Nonetheless, the widely variable apatite and silicate contents displayed by many Fe-Ti oxide |  | Pichavant, Michel, Kontak, Daniel J., Briqueu, Louis, Herrera, Jacinto Valencia, Clark, Alan H. (1988) The Miocene-Pliocene Macusani Volcanics, SE Peru. Contributions to Mineralogy and Petrology, 100 (3) 325-338 doi:10.1007/bf00379742 | Journal (article/letter/editorial) | | Springer-Verlag 1988 The Miocene-Piiocene Macusani Volcanics, SE Peru II. Geochemistry and origin of a felsic...1470, Lima 13, Peru Abstract. The Miocene-Pliocene Macusani ash-flow tufts from SE Peru, containing magmatic...fractionated relative to the first erupted. The Macusani magmas are direct products of crustal melting...fail to account for a number of features of the Macusani magmas, aH2o was internally controlled and magma...temperatures (up to 800 ~ C) in the source region. The Macusani magmas are generated as low melt fraction batches |  | | Journal (article/letter/editorial) | | 1. GEOLO(~tCAL SECTIOh'S through tl, e A~DES of PERU and Bo1,1vIA : I I - - F r o m tl~e P o w r o f............. (2) The Country between Arequipa and Puno .................. (3) The Country between Tirapata...Expedition ix) Peru. I t deals with a second and pal~llel section drawn through the south of Peru from the...and the port of Puno on Lake Titicaca, is accessible by the Southern Railway of Peru, of which we were...taken. For the continuation of the section beyond Puno through the Eastern Cordillera, it was found necessal |  | | Journal (article/letter/editorial) | | 1992 Pergamon Prc~s Ltd.Printedin U.S.A. LETTER Apatite solubility in peraluminous liquids: Experimental...melt compositions show a dramatic increase of apatite solubilities and phosphorus melt contents when...peraluminous melts qu~i~tively explains our data. A new apatite solubility model, incorporating the data for the...homogeneous population and to reduce problems of apatite contamination during electron microprobe analysis...53 wt% P,Os) pet-aluminousobsidian glassfrom Macusani, Peru (PICHAVANT et al., 1987, 1988b) was used instead |  | | Journal (article/letter/editorial) | | associated autunite mineralisation from Macusani Meseta, Peru. Mean δ238U values of uranium minerals relative...Canada, and peraluminous rhyolites from Macusani Meseta, Peru, to better understand (1) the primary mechanisms...and phosphates. Peraluminous rhyolites from Macusani, Peru were measured because they are the source of...represented by autunite veins hosted in Macusani Meseta rhyolites from Peru. Six stages of uranium mineralisation...for magmatic related, except for calcrete and Macusani mineralisation at < 50oC. Unconformity and related |  | Harlaux, Matthieu, Kouzmanov, Kalin, Gialli, Stefano, Laurent, Oscar, Rielli, Andrea, Dini, Andrea, Chauvet, Alain, Menzies, Andrew, Kalinaj, Miroslav, Fontboté, Lluís (2020) Tourmaline as a Tracer of Late-Magmatic to Hydrothermal Fluid Evolution: The World-Class San Rafael Tin (-Copper) Deposit, Peru. Economic Geology, 115 (8). 1665-1697 doi:10.5382/econgeo.4762 | Journal (article/letter/editorial) | | The World-Class San Rafael Tin (-Copper) Deposit, Peru Matthieu Harlaux,1,†,* Kalin Kouzmanov,1 Stefano...A., Jr. Lorenzo Bernini 149, San Borja, Lima 27, Peru Abstract The world-class San Rafael tin (-copper)...(-copper) deposit (central Andean tin belt, southeast Peru) is an exceptionally large and rich (>1 million...Miocene Sn-W ± Cu-Zn-Pb-Ag deposits in southeast Peru. Rare earth †Corresponding author: mharlaux@unr...(-Cu) deposit (central Andean tin belt, southeast Peru) that represents an exceptionally large and rich |  | | Journal (article/letter/editorial) | | occurrences are the Cenozoic ignimbritic tuffs of Macusani in Peru (Arribas and Figueroa 1985). Peralkaline granites...restricted circulation. U4+ is a proxy for Ca2+ in the apatite structure, but biologic activity may create reducing...environments where U may precipitate outside of the apatite structure. The largest episode of phosphate deposition...exemplified by the mid-European Variscan uranium province, which extends over more than 2,000 km from Spain...metalogenia de las mineralizaciones uraniferas de Macusani, Puno (Peru). Proc. IAEA Vienna, Symp. Uranium deposits |  | Wandji, Pierre, Tchokona Seuwui, Dieudonné, Bardintzeff, Jacques-Marie, Bellon, Hervé, Platevoet, Bernard (2008) Rhyolites of the Mbépit Massif in the Cameroon Volcanic Line: an early extrusive volcanic episode of Eocene age. Mineralogy and Petrology, 94 (3) 271-286 doi:10.1007/s00710-008-0013-6 | Journal (article/letter/editorial) | | Line (CVL) is a continental intraplate volcanic province (Fig. 1a) in Central Africa. This huge tectonic...*Hypersth. Mg *Hypersth. Fe Magnetite Ilmenite Apatite Total DI ASI AI Na2O/K2O Traces (ppm) As Ba Be...Escalant 1988), Cerro Cancahuine, Peru (Sandeman and Clark 2004), Macusani, Peru (Pichavant et al. 1988) 279...Afar Rift Corsica Iceland 0.1 Martinique Peru Macusani 0.01 Cs Rb Ba Th U crust in the genesis of...1994). Peraluminous rhyolites of Cerro Cancahuine, Peru, which have evolved under rather low fO2 conditions |  | | Journal (article/letter/editorial) | | from southern Peru to northern Argentina and is the easternmost metallogenic province of the central...porphyry systems. 313 314 DIETRICH ET AL. 76° PERU 72° Neogene-Recent volcanic arc Triassic and Tertiary...Proterozoic basement rocks 16° 68° San Rafael Macusani 16° Cerro Verde Chojlla Cuajone La Paz Toquepala...percent biotite. Accessory constituents are zircon, apatite, and leucoxene. Small amounts of igneous clasts...rare hornblende relics, and accessory zircon, apatite, and leucoxene. Samples of the unaltered Atocha |  | Webster, James D., Thomas, Rainer, Rhede, Dieter, Förster, Hans-Jürgen, Seltmann, Reimar (1997) Melt inclusions in quartz from an evolved peraluminous pegmatite: Geochemical evidence for strong tin enrichment in fluorine-rich and phosphorus-rich residual liquids. Geochimica et Cosmochimica Acta, 61 (13) 2589-2604 doi:10.1016/s0016-7037(97)00123-3 | Journal (article/letter/editorial) | | Background The Erzgebirge is a classic metallogenetic province that is situated within the Saxothuringian zone...southern Germany showing the Erzgebirge mining province and the location of the Ehrenfriedersdorf mining...triplite-( zwieselite), fluorite, F- and REE-rich apatite, molybdenite, sphalerite, uraninite, vivianite...feldspar, quartz, topaz, cassiterite, triplite, apatite, fluorite, and berlinite which is similar to the...the presence of muscovite, quartz, apatite, cassiterite, topaz, and small amounts of K-, Na-, and Cafluorides |  | | Journal (article/letter/editorial) | | At present, the compositions of micas and of apatite can constrain F contents of melts, though only...phosphate analogs, (2) solubility models for apatite, and (3) the calibration of P distribution between...values for these same minerals in rhyolite from Macusani, Peru [from table 6 of Pichavant et al. (1988)] (Table... From Icenhower & London (1995). From Macusani rhyolites, Peru (Pichavant et al., 1987). 2 In evolved...et al., 1989) and peraluminous rhyolite from Macusani, Peru (London et al., 1988) measured, among other |  | Borisova, A. Y., Pokrovski, G. S., Pichavant, M., Freydier, R., Candaudap, F. (2010) Amorphous Materials: Properties, Structure, and Durability: Arsenic enrichment in hydrous peraluminous melts: Insights from femtosecond laser ablation-inductively coupled plasma-quadrupole mass spectrometry, and in situ X-ray absorption fine structure spectroscopy. American Mineralogist, 95 (7) 1095-1104 doi:10.2138/am.2010.3424 | Journal (article/letter/editorial) | | spectroscopy, in a rhyolitic peraluminous glass from Macusani (SE Peru) that is representative of anatectic melts...and in volcanic rhyolites from the Macusani volcanic field in Peru [100–300 ppm, Pichavant et al. (1987)]...an As-enriched natural silicate glass from the Macusani volcanic field (macusanite), representative of...enriched peraluminous obsidian glass from the Macusani area, SE Peru, named macusanite (Pichavant et al. 1987...description The Pliocene obsidian glasses from Macusani, SE Peru, are associated with felsic peraluminous ash-flow |  | | Journal (article/letter/editorial) | | example of coexisting monazite and obsidian from Macusani, Peru. The solubility of monazite can be used as...play the dominant role in felsic suites. Zircon, apatite, monazite, sphene, allanite and xenotime, for example... This point is clearly demonstrated in the Macusani (Peru) glasses. These peraluminous obsidian glasses...analyses and structural formula of monazite from the Macusani glass Crystal No. ThO2 P205 Y203 CaO UO2 Gd203...properties problem, but the fractionation measured the Macusani glass-monazite pairs have been used to build a |  | | Journal (article/letter/editorial) | | of minerals containing B and P (tourmaline and apatite) has also been investigated in granitic liquids...a natural F-, B-, and Prich composition (Macusani glass, Peru). Starting material and procedures Starting...composition of the natural sample (MAC-JV1, Macusani glass, Peru) used in this study is given in Table 2...the experiments. Table 2. Composition of the Macusani starting glass - Experimental procedure Experimental...are given in Table 4 10 [] P-bearing melt ] [] Macusani melt ~ ? - . " 9 c,~/4"- I " .,4 ,~. 8oooc |  | | Journal (article/letter/editorial) | | element-bearing pegmatitic dikes of the LNPG (~90 Ma, apatite, U–Pb, Barnes, 2010) are located in the Canadian...cookeite), columbite-group minerals, cassiterite, apatite, tourmaline, beryl, lithiophilite, garnet (Groat...sample of the peraluminous natural volcanic glass Macusani obsidian, was measured to determine whether it...samples (Macusani, Peru; Pichavant et al., 1988a, b) were measured. One sample of Macusani obsidian used...al. (1988a). A separate pre-ground sample of Macusani glass (Tomascak et al., 1999) was also analysed |  | | Journal (article/letter/editorial) | | volcanic rocks focused mostly on the field near Macusani, Peru, at the northern end of the tin belt (Barnes...American Museum of Natural History, New York; Macusani vitrophyre containing 0·3 wt % H2O) 602 MORGAN...(bounded by dashed lines) and the locations of the Macusani (MAC) and Los Frailles (LF) volcanic fields. ...sample 85-01, with inclusions of ilmenite (Ilm) and apatite (Ap). (b) Texturally late muscovite (Mus) phenocryst...Accessory glomerocryst from CR sample 85-24 showing apatite (Ap) with zircon (Zrn: medium gray) and Ce-monazite |  | | Journal (article/letter/editorial) | | granite-pegmatite systems: experimental results with Macusani glass at 200 MPa David London, Richard L. Hervig...lithophile-element-rich rhyolite obsidian from Macusani, Peru, reveal high miscibility of H20 and silicate...by the deposition of accessory phases including apatite ( T < 550 ~ C), which depletes the melt in P and...study using rhyolite obsidian (macusanite) from Macusani, Peru (Barnes et al. 1970; Noble et al. 1984; Pichavant...f this a n d c o m p a r a b l e studies. The macusani rhyolite obsidian (maeusanite) Macusanite is a |
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