 | | 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 |  | Clark, Alan H., Palma, Vicente V., Archibald, Douglas A., Farrar, Edward, Arenas F., Mario J., Robertson, Ronald C. R. (1983) Occurrence and age of tin mineralization in the Cordillera Oriental, southern Peru. Economic Geology, 78 (3) 514-520 doi:10.2113/gsecongeo.78.3.514 | Journal (article/letter/editorial) | | OF TIN ORIENTAL, MINERALIZATION SOUTHERN IN PERU ALAN H. CLARK, VICENTE V. PALMA, DOUGLAS A. ARCHIBALD...polymetalliclode systems underdevelopmentin the Cordillerade Carabaya. The occurrence of significantamountsof tin in...tin-polymetallicsubprovinceon the 1:2,500,000metallogeneticmap of Peru (Bellido northeastern shore of Lake Titicaca in...the sub-Andeanrangesand tensioninto southeastern Peru is poorlydefined(Pe- the headwaters of the Rio Inambarl...Carabayadistrict(lat 14ø to 14ø$0'S dillera de Carabaya,at altitudesof up to 5,000 m. long70ø to 70ø45'W:Fig |  | | 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 |  | 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) | | Florida 33149 Macusanite Occurrence, Age, and Composition, Macusani, Peru ABSTRACT Macusanite, originally...is shown to be related to sillar of the Macusani region, Peru. K-Ar measurements establish identical Pliocene...Pliocene ages (4.2 m.y.) for macusanite and sillar and relate these deposits to the extensive ash flows...the transparent natural glass from Paucartambo, Peru, was a tektite, although it contained crystals of...Paucartambo glass. Heide (1936) described the Macusani glass. Martin (1934) and Martin and de Sitter-Koomans |  | 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...water and hydroxide ligands. Keywords: Arsenic, macusanite, XAFS spectroscopy, femtosecond LA-ICP-MS, fluid-melt...and in volcanic rhyolites from the Macusani volcanic field in Peru [100–300 ppm, Pichavant et al. (1987)]...natural silicate glass from the Macusani volcanic field (macusanite), representative of anatectic melts...peraluminous obsidian glass from the Macusani area, SE Peru, named macusanite (Pichavant et al. 1987, 1988a |  | 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) | | 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...With regard to major and most minor components, macusanite melt dissolves congruently in vapor. Among the...experimental study using rhyolite obsidian (macusanite) from Macusani, Peru (Barnes et al. 1970; Noble et al. 1984;...because of the unusual and problematic behavior of macusanite. These explanations, however, are important for |  | | 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...is essentially constant throughout the entire Macusani field. Two distinct generations of plagioclase...Miocene-Pliocene peraluminous volcanics from the Macusani area, SE Peru. Compared to previously described peraluminous |  | | Journal (article/letter/editorial) | | Springer-Verlag 1989 Vapor-undersaturated experiments with Macusani glass + H20 at 200 MPa, and the internal differentiation...fractional crystallization experiments with Macusani glass (macusanite), a peraluminous rhyolite obsidian, at...crystallization at 200 M P a for the Macusani rhyolite obsidian (macusanite) from SE Peru (Barnes et al. 1970; Pichavant...fractional crystallization and differentiation of macusanite melt for conditions at or below aqueous vapor...vapor saturation at 200 M P a total. The macusanite starting composition (Table 1), and the imposed pressure-temperature |  | | Journal (article/letter/editorial) | | B-enriched natural rhyolite obsidian, macusanitefrom Macusani, Peru, has also been determined. The viscosity of...The B-bearing haplogranitic compositions and macusanite 457 DINGWELL ET AL.: VISCOSITY OF HAPLOGRANITIC...Equation 3 range from 436 kJlmol to 304 kJ/mol. The macusanite liquid viscosity data are included inTable 2a...48 46 44 42 40 3,8 36 34 52 !-- 54 56 58 macusanite 60 62 64 10,oo0/T(K) Fig. 4. Comparison of...The viscosity-temperature relationship of the macusanite is compared in Figure 4 with that of a high silica |  | | Journal (article/letter/editorial) | | and macusanite (a peraluminous Li, B, F, and P enriched rhyolite obsidian from Macusani, Peru). Chrysoberyl...peraluminous macusanite at 850 °C (4016 ppm); we infer that the greater solubility of beryl in macusanite melt...P, and F-rich rhyolite obsidian (MAC) from Macusani, Peru (partial analysis in Table 1; see London et...complete analysis). The low solidus temperature of macusanite (London et al. 1989) permitted investigations...composition contained 75 wt% haplogranite or macusanite and 25 wt% beryl (e.g., referred to as HGS4 + |  | | 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 |  | | Journal (article/letter/editorial) | | internal differentiation Table 3. The Macusani glass (macusanite) Chemical analyses,Hacusani glass mol...element partitioning at 200 MPa using the Macusani glass (macusanite) as starting material are presently under...LONDON etal.,1986a; LONDON and HERVIG, 1986). The Macusani glass is an excellent analogue to rare-element...1977). Like the Harding pegmatite chip composite, macusanite is peraluminous, with wt.% Na20/Kz0 > 1. Total...abundances of all alkalis, F, B and P are higher in macusanite than in the Harding composite. High HffZr,.Ta/ |  | | Book | | Gemstonesof Peru . TO ' ..J.O[_)(ON '\J./ITI1 KY Be-51 R~GAF-P5 f JaroslavHyrsl Gemstonesof...Gemstonesof Peru GRflnil © 2012 Text by Jaroslav Hyr~I © 2012 Photos by Jaroslav Hycll (166), Fidel Salinas...Coll. Z. Rosales. Photo J Hyrsl. 6 Introduction Peru is a country rich in minerals, with numerous very...Crowley et al. (1997) and most recently in the book "Peru, Paradise of Minerals" (Hyrsl et al., 2011 ). N...deals with faceted gemstones, which are very rare in Peru. And finally, the reader can find the bibliography |  | 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) | | philippinites on Cabarruyan Island in Pangasinan Province. It is still a mystery (von Koenigswald, 1963b)...southern Viet Narn, in the southwest, and to the Province of Bukidnon, Mindanao, Philippines, in the southeast...common to layered tektites. The distance from the Province of Bukidnon to the northwesternmost layered tektites...arriving over a very short interval of time. MACUSANITE IN PERU Although it was unlikely that americanites...during 1961 I visited the locality reported near Macusani, Peru, which is at an elevation of about 4300 m. |  | | Report (volume) | | from 24 localities in the Western United States, Peru, Canada, and Czechoslovakia------------------- ...natural glasses from the Western United States, Peru, and Czechoslovakia-------- Page 21 23 24 26 28...have concordant fission-track and K-Ar ages (macusanite and moldavite; table 6, nos. I and 9) remained...s w (!) < a.. a.. < a: a: ~ < 5 MACUSANITE, PERU Sample 2, table 6 0~----------~---------...andJoensuu, Oiva, 1970, Macusanite occurrence, age, and composition, Macusani, Peru: Geological Society of |  | | Journal (article/letter/editorial) | | CENOZOIC VOLCANISM AND TECTONISM IN T H E ANDES OF PERU Donald C. NOBLE Mackay School of Mines, University...(USA) and Cia. de Minas Buenaventura, S.A., Lima (Peru] Edwin H. M c K E E U.S. Geological Survey, Menlo...major volcanic activity in central and southern Peru, northern Chile, and adjacent areas during the Early...aL, Volcanism and tectonism in the A n d e s o f Peru Pacific basin [3, 7]. Of particular importance...Castrovirryena in Huancavelica Department, central Peru (Fig. 1) [16,17]. This sequence is composed mainly |  | | Journal (article/letter/editorial) | | crystallization experiments with obsidian from Macusani, Peru; the composition of that obsidian is virtually...2006). Melt containing 4 wt% H2O derived from the Macusani obsidian (saturated at ~10 wt% H2O) at 200 MPa...K-feldspar Figure 2. A representative experiment with Macusani glass + 3–4 wt% added H2O, preconditioned at 750...corresponds to the normative feldspar composition of the Macusani glass. From London (2008). crystals only (Evensen...Vapor-undersaturated experiments in the system macusanite-H2O at 200 MPa, and the internal differentiation |  | Hervig, Richard L., Moore, Gordon M., Williams, Lynda B., Peacock, Simon M., Holloway, John R., Roggensack, Kurt (2002) Isotopic and elemental partitioning of boron between hydrous fluid and silicate melt. American Mineralogist, 87 (5) 769-774 doi:10.2138/am-2002-5-620 | Journal (article/letter/editorial) | | (Table 1) was a natural peraluminous sample from Macusani, Peru, containing ~2000 ppm B (Pichavant et al. 1987)...4 0.22 6.67 11.5 2.68 0.15 n.a. 2300 RESULTS Macusanite† 0.54 72.5 0.03 16.0 0.62 0.06 0.02 0.19 4.12...“ “ Au-Pd 170 1100 52 0.54 –1.3 (3.4) MACB-2 Macusanite Piston Cyl Au 500 850 48 1.19 –4.4 (2.0) MACB-4...granite-pegmatite systems: Experimental results with Macusani glass at 200 MPa. Contributions to Mineralogy...Treuil, M., and Vernet, M. (1987) The macusani glasses, SE Peru: evidence of chemical fractionation in |  | | Journal (article/letter/editorial) | | of a two-mica ignimbrite suite: the Macusani Volcanics, SE Peru Michel Pichavant and Jean-Marc Montel...ABSTRACT: The Miocene-Pliocene Macusani ash-flow tuffs and glasses from SE Peru are a rare example of two-mica...Cordillera Oriental in the Central Andes. In the Macusani field, the rocks are characterised by andalusite...differences between the magmatic evolution of the Macusani Volcanics and of Hercynian and Himalayan two-mica...paper focusses on the Miocene-Pliocene Macusani Volcanics from SE Peru, which, so far, constitute the only |  | | Journal (article/letter/editorial) | | 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...of a much higher Cl content compared with the macusanite material. These results make a strong case for...F-, B-, and P-rich system represented by the Macusani glass (London et al., 1988). FLUORINE At the |  | | Journal (article/letter/editorial) | | metaconglomerate, from Capoeira 2, Borborema Pegmatitic Province, Brazil. (c) A gigantic skeletal crystal of tourmaline...is virtually indistinguishable from the Macusani obsidian, Peru (London et al., 1988). The calculated bulk...be lower (e.g., near the solidus of the hydrous Macusani obsidian, 450 °C, at 200 MPa: London et al., 1989)...which should be close to the solidus of hydrous macusanite (i.e., if one of the phases trapped was a low-melting...plagioclase, and then monophase quartz. In the system macusanite–H2O (London et al., 1989), the initial assemblage |  | | Journal (article/letter/editorial) | | southern extension of the Altiplano of southern Peru, Bolivia, and northern Chile, is a high plateau..."inner magmatic arc" is a belt that extends from Peru through the Eastern Cordillera on the ea'stern margin...0 2 PANIZOS 66.7% Si02 CORANZULI 68.4% S i 0 2 MACUSANI 72.0% SiC>2 CERRILLOS67.8%Si0 2 K Ba Th Ta La...(PG353 in Table 2); Panizos (A-9 in Table 2); Macusani (MH5 in Pichavant et al., 1988) and Cerrillos...arc-like Ba/La ratios. Ba/Ta and La/Ta ratios in Macusani samples could reflect fractionation of minor accessory |  | Zhu, Jin-Chu, Li, Ren-Ke, Li, Fu-Chun, Xiong, Xiao-Lin, Zhou, Feng-Ying, Huang, Xiao-Long (2001) Topaz–albite granites and rare-metal mineralization in the Limu District, Guangxi Province, southeast China. Mineralium Deposita, 36 (5) 393-405 doi:10.1007/s001260100160 | Journal (article/letter/editorial) | | rare-metal mineralization in the Limu District, Guangxi Province, southeast China Received: 7 December 2000 / Accepted:...county, 65 km east of Guilin city, NE Guangxi Province, southeast China. The continental part of China...Austell, Beauvoir, Yichun and Podlesi, and the Macusani obsidian are well-studied representatives for... dike no. 431 in Xianghualing district, Hunan Province, shows an upward vertical zonation from microporphyritic...Burnol 1998) and the obsidian glass (macusanite) in volcanic tu in SE Peru (Pichavant et al. 1988) also have |
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Macusani, Carabaya Province, Puno, Peru