 | | 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...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...latitude, 70 350 300 W longitude in Puno Department of southeastern Peru. The valley is eroded into the SE |  | | 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) | | 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...9 _ 7 5 , plagioelase, biotite, muscovite and andalusite (both coexisting in the entire volcanic field)...is essentially constant throughout the entire Macusani field. Two distinct generations of plagioclase |  | | 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 –...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;...et al., 1984; 1990a), a long-lived petrogenetic province distinct in numerous respects from the contemporaneously |  | 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) | | 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;...felsic rocks (e.g., granites from Central Spain and Macusani glasses). In the Abdel-Rahman (1994) diagrams...They are similar in this respect to biotites from Macusani glasses (Pichavant et al., 1988a) and from highly |  | | Report (issue) | | = 5.454(1) Z = [1] X-ray Powder Pattern: Macusani, Peru. 3.441 (100), 1.870 (25), 4.442 (13), 1.605...(1) 77.29 16.57 0.64 4.93 0.0 0.57 100.0 (1) Macusani, Peru; by electron microprobe and laser spectrograph;...peraluminous volcanic glass. Association: Quartz, andalusite, sillimanite, potassic feldspar, biotite, spinel...spinel. Distribution: From near Macusani, Puno Department, Peru. Name: In honor of Professor Virgil...lithium aluminum silicate mineral from the Macusani glass, Peru. Amer. Mineral., 63, 461{465. All rights |  | 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...magmatic andalusite and muscovite, have homogeneous major element compositions, with a narrow range of...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 |  | | Journal (article/letter/editorial) | | and Triassic Sn–W–(Ag-base metal) metallogenic province, commonly referred to as the Bolivian tin belt...proposal include: (1) the coincidence of the tin province and the Inner Arc in a marked bhumpQ in the Andean...tectonic indentation; (2) the symmetry of the tin province with respect to the Bolivian orocline, the axis...Central Andean tin belt is an elongated metallogenic province, confined to the Eastern Cordillera of the Andean...extending for more than 1000 km from southeastern Peru, through Bolivia, up to northern Argentina (Fig |  | BARNES, VIRGIL E., EDWARDS, GEORGE, McLAUGHLIN, W. A., FRIEDMAN, IRVING, JOENSUU, OIVA (1970) Macusanite Occurrence, Age, and Composition, Macusani, Peru. Geological Society of America Bulletin, 81 (5) 1539 doi:10.1130/0016-7606(1970)81[1539:moaacm]2.0.co;2 | Journal (article/letter/editorial) | | Macusanite Occurrence, Age, and Composition, Macusani, Peru ABSTRACT Macusanite, originally believed to...is shown to be related to sillar of the Macusani region, Peru. K-Ar measurements establish identical Pliocene...than normal; and highalumina minerals such as andalusite are present. INTRODUCTION geological and petrological...from Paucartambo, Peru, was a tektite, although it contained crystals of andalusite, sillimanite, wollastonite...Paucartambo glass. Heide (1936) described the Macusani glass. Martin (1934) and Martin and de Sitter-Koomans |  | | 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) | | 53 wt% P,Os) pet-aluminousobsidian glassfrom Macusani, Peru (PICHAVANT et al., 1987, 1988b) was used instead...aluminous melt commotions. The andalusites from Macusani, Peru have a composition close to the Al$SiOsendmember...and&site were also conducted to compare with the andalusite added experiments and with previous studies (HARRISON...G=gel: Ap=apatita; All experiments And=andalusite; Mac=Macusani And glass; Ca-P-Glass=glass are of...calculate A/CNK, except for experiments with the Macusani glass (A/CNK = molar A1/(2Ca + K + Na + Li), Li |  | | Journal (article/letter/editorial) | | newlithium aluminumsilicatemineralfrom the Macusaniglass,Peru BnveNM. FnsNcs 7408 WyndaleLqne,CheuyChase,Maryland...found in volcanic glassof unusualcompositionfrom Macusani,Peru.It is the only naturally-occurring representativeof...Institution,Washington,D. C. underMeteoriteColnear Macusani, Peru (latitude l4oS, longitude lectionnumberNMNH...commonlyobservedon the occursas a rare to commonphasein the Macusani crystalsof quartz(Figs.2, 3), K-feldspar,biotite...quartz fragment overgrown by fibrous virgilite in Macusani glass filled with small euhedral virgilite crystals |  | | Journal (article/letter/editorial) | | 945. Andamoolca, South Australia, opal, 429. Andalusite, pseudomorphs of kyanite after, Spain, xlix,... West Pakistan, kyanite pseudomorphous after andalusite, 669. Chrysoberyl, crystallization of from beryl...Di/co Abuja, Nassawara Xigeria, stolzite, 995. Province, DIMES (F. G.), see JOBBINS (E. A.), 881. Diopside...(C. J.) & Moss (A. A.), Natural glass from Macusani, Peru, 423. Emmons double-variation refractiveindex...Galicia, Spain, kyanite pseudomorphous after andalusite, xlix. Garnet, Donegal, anal., opt., X-ray, origin |  | | Journal (article/letter/editorial) | | Bolivia, define a layered stratigraphy of basal andalusite-, biotite(± muscovite)-bearing rhyolite tuffs...(405) 3253140. e-mail: gmorgan@ou.edu KEY WORDS: andalusite; cordierite; melt inclusions; peraluminous; rhyolite;...volcanic rocks focused mostly on the field near Macusani, Peru, at the northern end of the tin belt (Barnes...except for accessory phases. Inclusions in the andalusite-bearing rhyolite tuffs were devitrified; these...American Museum of Natural History, New York; Macusani vitrophyre containing 0·3 wt % H2O) 602 MORGAN |  | Ericksen, G.E., Smith, R.L., Luedke, R.G., Flores, Mario, Espinosa, Alfredo, Urquidi, Fernando B., Saravia, Fernando (1985) Preliminary geochemical study of ash-flow tuffs in the Morococala and Los Frailes volcanic fields, central Bolivian tin belt. Open-File Report Vol. 1985 (85-258) US Geological Survey doi:10.3133/ofr85258 | Report (issue) | | ash-flow tuffs from the western U. S. and southern Peru ................................ 1 1 4 5 6 8 ABSTRACT...minerals, the common peraluminous minerals of andalusite, cordierite, and muscovite. The tuffs probably...California (Hildreth, 1979) and the tuffs of Macusani of southern Peru (Noble and others, 1984). The Bishop Tuff...zoning in the parent magma chamber. The tuffs of Macusani were selected for comparison because of their...figure 3 have generally overlapping ranges. The Macusani tuffs (fig. 3), in contrast to the tuffs from |  | | Journal (article/letter/editorial) | | crystallization during magma ascent. Anhedral andalusite and rare sillimanite with hercynite are the aluminarich...peraluminous two-mica rhyolites and granites of Alaska, Peru, South-West England, Portugal, Czech Republic, Mongolia... accessory minerals 1 % (Villa et al. 1987). Andalusite, cordierite and locally sillimanite and hercynite...Carlsbad twinned K-feldspar [1.6 mm]; f) sericitised andalusite [0.6 mm]; g) hercynite associated with sillimanite...feldspar at the expenses of biotite, albite, andalusite, and quartz. A further argument in favor of this |  | 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) | | 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...crystals, apart from some andalusite needles. Only glass pieces without andalusite crystals were selected...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) | | 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...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...2143-17) contains < 0 . i vol.% phenocrysts of andalusite (micro and coarse grained) and virgilite (approximately |  | | Journal (article/letter/editorial) | | 85, 495-501, 1990 Finding of osumilite and andalusite ash layer in Niigata KATSUKI KUROKAWA*, Prefecture...data for at osumilite and of osumilite and andalusite has not been reported from the volcanic date...the silicic The ash are The and is in andalusite and peraluminous less stability in size...4mm coexisted 750•Ž andalusite Introduction The association from andalusite around 950-21, Japan... P-T the phenocrysts in and low of the andalusite University, Japan , Niigata volcanic subaqueous |  | | Journal (article/letter/editorial) | | example of coexisting monazite and obsidian from Macusani, Peru. The solubility of monazite can be used as...demonstrated in the Macusani (Peru) glasses. These peraluminous obsidian glasses, contain andalusite, sanidine...zircon have been reported mainly as inclusions in andalusite (Pichavant et al., 1987a, 1988). A systematic...analyses and structural formula of monazite from the Macusani glass Crystal No. ThO2 P205 Y203 CaO UO2 Gd203...39 Monazites 1 and 2 occur as inclusions in andalusite (Pichavant et al., 1988; fig. 6c). Others are |  | | Journal (article/letter/editorial) | | cordierite, the aluminum silicate polymorphs (mainly andalusite and sillimanite), muscovite, topaz, and tourmaline;...Cordierite } l.3-I.Sb Fe,Mg,Mn garnet Tounnaline Andalusite/ sillimanite Topaz AI2SiO, Infinite Infinite...& Clarke 1985). ALUMINUM SILICATE POLYMORPHS Andalusite and sillimanite are the principal polymorphs...Peak Granite. MUSCOVITE, TOURMALINE, TOPAZ, AND ANDALUSITE IN PERALUMINOUS GRANITIC ROCKS A persistent...the solidi intersects the stability field of andalusite. positional departures of these peraluminous |  | Lehmann, B., Dietrich, A., Heinhorst, J., Métrich, N., Mosbah, M., Palacios, C., Schneider, H. -J., Wallianos, A., Webster, J., Winkelmann, L. (2000) Boron in the Bolivian tin belt. Mineralium Deposita, 35 (2) 223-232 doi:10.1007/s001260050017 | Journal (article/letter/editorial) | | magmatic-hydrothermal systems of the Bolivian tin province. The average boron content in melt inclusions...the Andean tin belt of Bolivia and southernmost Peru. Both metal provinces represent short episodes of...central Andes The Andean tin belt of Bolivia, SE Peru and northernmost Argentina (Fig. 1), usually known...mine (Amlot 1998), is the San Rafael mine in SE Peru which works a vein system in association with a...fractionated tus and obsidian glasses of the Macusani volcanic ®eld, SE Peru (Fig. 3). The trends shown in Fig. |  | | Journal (article/letter/editorial) | | Mineralogist, Volume 87, pages 433–444, 2002 Andalusite-sillimanite replacement (Mazarrón, SE Spain):...Neogene Volcanic Province contain numerous xenocrysts and xenoliths with abundant andalusite that displays...coarse sillimanite. At the onset of replacement, andalusite dissolves along grain boundaries and (110) cleavage...replacement of andalusite is observed. The mutual crystallographic orientation of andalusite and sillimanite...proposed (discussion in Pattison 1992). In nature, andalusite together with fibrolite or coarse-grained sillimanite |
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