| Lustrino, Michele, Melluso, Leone, Brotzu, Pietro, Gomes, Celso B., Morbidelli, Lucio, Muzio, Rossana, Ruberti, Excelso, Tassinari, Colombo C.G. (2005) Petrogenesis of the early Cretaceous Valle Chico igneous complex (SE Uruguay): Relationships with ParanĂĄâEtendeka magmatism. Lithos, 82 (3) 407-434 doi:10.1016/j.lithos.2004.07.004 | Journal (article/letter/editorial) | Cidade UniversitaĚria, CEP 05508-900, SaĚo Paulo, Brazil e Departamento de Geologia, Instituto de Geologia...SiO2-rich rocks. Mineralogical (sporadic presence of pigeonite, Caâ Na and Na clinopyroxene, calcic- and calco-sodic...the south American plate, mostly concentrated in Brazil (Serra Geral Formation; Piccirillo and Melfi, 1988;...products mostly occur in the ParanaĚ basin (N95% in Brazil; b5% in Uruguay), whereas the felsic volcanic rocks...around the ParanaĚâEtendeka igneous province in Brazil, Bolivia, Paraguay, Uruguay, Angola and Namibia | | | Journal (issue) | Crystal 25x 17x 17mm. J& 60/13411. Agate (onyx) ?Brazil]. 6x 5 CM.N2 636/3292. Hofmann collection. All...Hungary, the Harz, Italy, Tirol, Saxony, Switzerland, Brazil, North America, Sitka Island, and Manila (Philippines)...80- L a Paz 81- Moctezuma 82- L o s Lamentos 83- Santa Eulalia; Naica 84- Ojuela mine, Mapimi 85- Cosala...Mine, Mohave Co.: ! arsenic â Washington Camp, Santa Cruz Co. â kidneys up to several kg in weight (E...official "state mineral"; ! quartz â Holland Mine, Santa Cruz Co. âJapan law twins up to 18 cm, probably | | | Book | .......................................... 167 Brazil..................................................particular of Africa, the U.S.S.R., Canada and Brazil, much of it inspired by the search for exploitable...Montreal area of Canada and for central Coais, Brazil. N11111ber and na111e Each occurrence has been...a n;:itional number, for example Jacupiranga is Brazil 88. This is followed by the preferred name of the...Wagontire Mountain 45 Buzzard Creek 46 Hart Mountain 47 Santa Rosa 48 New Idria 49 San Joaquin-Kings volcanic | | | Journal (article/letter/editorial) | Fazl,CaO o.42, Cr203 o.63 wt ~o; rim to Fal) and pigeonite (En73Fsl sWo9) in a lineated texture with triple...Secondary melt inclusions and veins in olivine and pigeonite contain clinopyroxene (Ensz_6oFs6_zsWo22~,2),...~978) are characterized by about 7o~o pyroxene (pigeonite En70Wo 11-En2owo2o and augite En48Wo32-En33Wo32)...most eucrites by low-pressure fractionation of pigeonite and plagioclase from liquids similar in composition...of magma by partial melting of olivine Fa 35, pigeonite En 65Wo 5, plagioclase An94, Cr-spinel, and metal | | | Report (issue) | However, as emphasized by DĂŠruelle et al. (2007), pigeonite, a mineral symptomatic of transitional lavas,...SĂŁo Paulo, Rua do Lago 562, 05508-080 SĂŁo Paulo, Brazil ABSTRACT Post-Paleozoic magmatism in Angola and...available samples; inset of Fig. 3). 20°W S 10° BRAZIL 10°S Araguaia -ParanaĂb a-Cabo F Pon ta G ros...the carbonatitic plug of the Lages district (Santa Catarina State, Brazil; ca. 76 Ma; Comin-Chiaramonti...to the Lages field in Santa Catarina State, Rio Grande RiseâUruguay lineaments (southern Brazil; Comin-Chiaramonti | | Cobbing, E. J., Pitcher, W. S., Wilson, J. J., Baldock, J. W., Taylor, W. P., McCourt, W., Snelling, N. J. (1981) The Geology of the Western Cordillera of northern Peru. Overseas Memoir 5. Institute of Geological Sciences | Report (issue) | c. - L.cF\ ďż˝- 0C\t:;24-0(\ COLOMBIA ECUADOR BRAZIL ,. ⢠1/f ., ... ... - - II ... - â˘...Rosa Supu-unit 44 The Santa Rosa Super-unit in the Huaura Complex 46 The Santa Rosa Super-unit in the...Fortaleza Complex 48 The Santa Rosa Super-unit in the Casma Complex 48 The Santa Rosa Super-unit: a summary...{Antamina/11agistral/Pasto Bueno) group 120 Cordillera egra (Santa Toribio/Pashpa/Patara) group 120 Quiruvilca/Chiletc...facies and 4 Diagrammatic 33 Distribution of the Santa Rosa and Paccho super-units stratigraphic relations | | | Book (volume) | at the Second International Conference, held in Santa Fe, New Mexico, October 3-7, 1977. Conference was...Kimberlites and Other Volcanics Kimberlite Conference, Santa Fe, New Mexico, 1977. Prinz, M., D.V. Manson...Geophysical Union Conference, Second Inter- Santa Fe, New Special Publications The Mantle Sample:...associated rocks, Second International Conference, Santa Fâ˘, NewMexico, 1977. and peridotitc cation to...kimberlites and Southern Wyoming Ă origin of kimberlite, Santa Fâ˘, New Mexico, A.J., Distribution and ultramafic | | | Book | ey Parenr ,nagrnas of the Sen1ail ophiolite pigeonite silica F1a . 2. Infe rred phase relations of...defor mation structures and metamorphic assemb lages similar to those o bserved in the CC are not present...dykes striking NW cur all of the deformed asse1nb lages and were themselves displaced along main ly W-side-up...levels. amphibolite facies and lower-grade assemb lages occur. Some textures suggest static mi neral overgrowths...orthopyroxene a nd microlites of subcalcic augite and pigeonite set in a glassy ground mass. Olivine forms euh | | | Journal (volume) | granulites-quartz (sapphirine-bearing in M2 assemb lages) C D )> (/'J I 2 3 .i l Sill + Opx Sil l +...worldwide, e.g. in Uganda (Nixon et al. 1973), in Brazil (Vicente et al. 1978), in India (Grew 1982), and...sapphirine + cordierite, while in spinelbearing assemb lages, the symplectites consist of sapphirine + orthopyroxene... occurrence in the Pien area, Parana. southern Brazil. Re,¡. Bras. Geoc., 8. 284-293. Vielzeuf, D. 1980...labradorite, labradorite-andesine, titaniferous augite, pigeonite and olivine. Hornblende, sphene, epidote and scarce | | | Book | India 4 1.2 Kimberlite and lamproite fields in Brazil 7 1.3 Kimberlite fields in South Africa 8 1...Histogram of radiometric dates of alkaline rocks in Brazil 250 14.6 Range of radiometric dates for different...described in Sanskrit texts. Brazil The next great diamond rush occurred in Brazil during in the first half...several diamond placers had been found in eastern Brazil in the region of Teune City, which was later renamed...southeastern Brazil. In 1844, rich diamond deposits were found in another region of Brazilâthe state of | | | Report (issue) | __304 Bolivia _____________________________304 Brazil _____________________________304 Cape Verde __...distinguishing pyritic zones in the vicinity of Santa Rita, N. Mex. The geochemical data delineated a...Georgetown silver district, 7.3 km northeast of Santa Rita. The high Fe-Mn ratio is accompanied by northeast-trending...mineralization solutions and a cogenesis for the Santa Rita copper deposits and the Georgetown silver deposits...A similar manganese halo is associated with the Santa Rita porphyry copper de posit to the west. A narrow | | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book | and Crystallographic Features in Brejui Mine, NE Brazil H. Beurlen, E.B. Melo, and H.S. Villaroel (With...Strata-Bound Mineral Deposits in the Early Cretaceous Santa Metallotect of North and Central Peru A. Samaniego...property of the Zambales Chromite Mining Company, Santa Cruz, Zambales, Luzon, Philippines. Unpubl report...von (1970) On the phase-change orthopyroxene-pigeonite and the resulting textures in the main and upper...and Crystallographic Features in Brejui Mine, NE Brazil H. BEURLEN, E.B. MELO, and H.S. VILLAROEL 1 Abstract | | | Book | clinopyroxene phenocrysts, to dolerite augite and pigeonite as the main mafic minerals. The variations in...mafic mineral with subordinate olivine in the pigeonite radorite chilled rimmed margins and by augite...with microliths of plagioclase, hornblende and pigeonite with small scattered garnets in the groundmass...a complementary decrease in the proportion of pigeonite compared to hornblende present reflected by a... commonly contain primary igneous assemb- lages. Many are mafic-rich and the suite is remarkably | | | Report (issue) | Carlin-type gold deposits in the Northumberland, Santa Fe, and Relief Canyon districts are thought to be...irnportant producer beginning in 1905, and the Santa Fe district, discovered in 1879 and rnainly exploited...specin1ens were difficult at best, and ,nineral assemb lages for many historic minin g ca ,nps are poorly known...Battle Mountain cListrict, in several tnines of the Santa Fe district, and in a few n1ines in the Spruce Mountain...n1etasomatic rock prospected for copper in the Santa Fe or Fitting districts. At the Killie Mine, in | | | Book | the later formed, more Fe-rich rocks contain a pigeonite (PIG) and a Ca-rich clinopyroxene (CPX), both...lamellae. This process is usually referred to as pigeonite inversion to orthopyroxene, although the term...10(b)) . As in WE 9(a) , the sequence of assemb lages developed with changing conditions will be strongly...lamellae. This process is usually referred to as pigeonite inversion to orthopyroxene, although the term | | | Report (volume) | significance of a coarse marine sediment from near. Santa Catalina Island, Calif.: Jour. Geology, vol. 52...Cotton, Charles Andrew. 1. Glacial epochs in the Santa Monica Mountains [Calif.], a discussion: Jour. Geology... 1. Hazzard, John Charles. 1. Some features of Santa Susana thrust, vicinity of Aliso Canyon field, Los...reputed destructive earthquake of Jan. 16-18,1840 [Santa Cruz, Calif.]: Seismol. Soc. America Bull., vol...particularmente en las zonas de Jarahueca, Prov. de Santa Clara y al este y oeste de la inisrna: Soc. cubana | | | Report (issue) | and Ribeira (Brazil) belts Porada, 1979 South America Complete Wilson Cycle. E. Brazil Pedreira, 1979...continental collision in the Rio Pardo basin of eastern Brazil: Geology, v. 7, p. 445-448. Piper, J.D.A., 1976...Pan-AfricanBraziliano cycle in Namibia (Southwest Africa) and Brazil as interÂŹ preted in terms of continental collision:...earliest part of the path accommodates tillites of Brazil (^600 Âą 25 Ma), Ghana (^620 Ma), Algeria and Mauretania...Africa which forms a lineament with locations in Brazil (Hurley and Rand, 1969); in common with a number | | | Book | natite-quartz veins hosted by Proterozoic iron formation in Brazil (Olivo et al., 1995). Alteration Mineralogy and...Au-Ag deposit. as well as in greenstone belts of Brazil and western Africa. However, Canadian deposits...diagenetic pyritization, in Ladeira, E.A., ed., Brazil Gold '91: The Economics, Geology, Geochemistry...according to wallrock-alteration minera l assemb lages: Ore Geology Reviews. v. 6. p. 291-331. Muir, T...liabira district, southern Sao Francisco craton, Brazil: Geo logic and structural controls: Economic Geology | | | Report (issue) | Revision of the geology of diamond districts in Bahia, Brazil. U. S. Geol. Surv. Prof. Pap. 424-D, 211-213. ...MgSiO;-CaMgSi.O, at 20 kbar showing the field for pigeonite (Cpx) after Kushiro (1969). CaM gSivOg above...have thus far been studied. The narrow field for pigeonite in the system MgSiO3CaMgSi.O, at 20 kbar discovered...reinvestigation in the light of Kushiroâs discovery. The pigeonite field in Figure 6 is considerably more Mgrich...possible that the clinopyroxenes in Kushiroâs pigeonite field (Fig. 6) actually have C2/c symmetry at | | | Report (issue) | _ 9 ________ Juniper claim ______________ _ a Santa Cruz County 61_ _____ _ Grand View group __________...- - - - - - - - - _Bonus _____________________ Brazil _____________________ _ Crazy GirL ________________...-----------------11 -------- -------- ~------Pigeonite ___ --------------~---------------------- -------12...with uranium. Molybdenum and, to a lesser extent, ~lages from one deposit or district to another because...Ridge, Tenn. - - - 1951, Annie Laurie prospect, Santa Cruz County, Arizona: U.S. Atomic Energy Comm. RM0-677 | | | Book | pyroxenes with coarse exsolution lamellae lie in the pigeonite field. It ,. remains uncertain whether the pigeonites...sapphirine + quartz in metapelites, relatively Mg-rich pigeonite or aluminous pyroxenes ¡in metabasites and meta-ironstones...Very-high-T indicators such as mesoperthite, pigeonite, or Spr + Qtz are generally absent. Some spatial...1200 Ha dykes camion. Contain Grt + Cpx assent>lages. Proterozoic ones probably absent. Several cross-cutting...Drumbeg; ~1000 S = Scourie; Reintegration pigeonite in St= Stoer of ferrometaironstone St S (Fig | | | Report (issue) | material was relatively unimportant in the assemb lages from below 3510 ft {1070 m) but a few specimens...pyroxene (2V positive, 30°- 40° , sub-calcic augite/pigeonite), magnetite, fibrous zeolite (levyne) and occasional...present : ° ° hypersthene (2V negative, large) and pigeonite (2V positive, 20 -30 ), and a few crystals with...may be hypersthene in a state of inversion to pigeonite. The flow from which this specimen came is very...5 Phyllopachyceras occlust,m, 80 Picrite, 98 Pigeonite, 99 Pine (Pinus), 1 38, 1 44 - Hill, 2 1 Placunopsis | | | Report (issue) | part of the Rio Grande Rise immediately offshore Brazil (Oreiro et al., 2006). The Atlantic Ocean contains...its surroundings, Santos and Campos basins, SE Brazil: An example of non-plumeârelated magmatism: http://mantleplumes...from the hotspot to the mid-Atlantic, and that Santa Maria is due to flow from the hotspot to a minor...Department, 1156 High Street, University of California, Santa Cruz, California 95064, USA Allen McNamara School...University of California at Santa Cruz, Earth and Marine Science Building, Santa Cruz, California 95064-1077 | | | Book (volume) | assemblages containing low-temperature albite to assembÂŹ lages containing low-temperature plagioclase with the...°C. Synthesized at 380°C. Natural, Brazil. Natural. Natural, Brazil. Natural, a-Quartz ; accurate cell...100-48 1-477 in) 0-001 2-354 Rose quartz (242 g.), Brazil (Vultee, 1955) (Includes PbO 0-006). Quartz (5...plane {1010}. Dauphine law. Twin plane {1120}. Brazil law. Twin plane {1122}. Japanese law. Twin plane...plane {1121}. Breithaupt law. Combined Dauphine-Brazil law. (In the so-called Zinnwald twin of quartz | | | Book (edition) | to use unexsolved, coexisting three-phase assem~lages following the textural criteria proposed by Hutchison...+quartz (> 900°C), osumilite +quartz(> 950°C). Pigeonite (ternary pyroxene) may also appear in high-grade...Wus Zo Zrn protoenstatite periclase paragonite pigeonite phengite phlogopite plagioclase pumpellyite pentlandite...193 Piemontite 264 Piezo-therrnic array 67, 69 Pigeonite 220 Pinitization 115 Plagioclase 42, 71, 82, 100 |
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