 | e Silva, Jonas Mota, Ferreira Filho, Cesar Fonseca, Bühn, Bernhard, Dantas, Elton Luiz (2011) Geology, petrology and geochemistry of the “Americano do Brasil” layered intrusion, central Brazil, and its Ni–Cu sulfide deposits. Mineralium Deposita, 46 (1) 57-90 doi:10.1007/s00126-010-0312-9 | Journal (article/letter/editorial) | | and geochemistry of the “Americano do Brasil” layered intrusion, central Brazil, and its Ni–Cu sulfide...Springer-Verlag 2010 Abstract The “Americano do Brasil” Complex (ABC) is part of a cluster of coeval...during the Brasiliano/Pan-African Orogenic Cycle in Brazil. The medium-sized ABC consists of interlayered...of olivine (up to Fo88) and the crystallization sequence of the ABC (Ol+Chr≥Ol+Opx+ Chr ≥ Cpx + Opx ≥ Opx...websterite and gabbronorite in the more fractionated sequence of the ABC, is a cluster of several Editorial |  | | Book | | complexities, and was happy to learn that platinum–palladium do exist at Sukinda–Nausahi Belt. However, what I saw...wild animals and a few tribal villages. I used to do geological studies in the forest from early morning...tpa/d SIC SUC USGS/USBM Bushveld Igneous Complex Complex Department of Mines and Geology Department...annum/day Sudbury/Stillwater Igneous Complex Sukinda Ultramafic Complex United States Geological Survey/...significant in Canada, United States, Australia, Africa, Brazil, New Caledonia, Philippines, Indonesia, and the |  | | Book | | Geosciences Institute University of São Paulo São Paulo Brazil Pedro Oyhantçabal Departamento de Geodinámica Interna...recognized similarities in the ‘old granites’ of Brazil and southern Africa. On the other hand, du Toit (1927)...‘Brazilian system’ defined by Alcide d’Orbigny in Brazil (Beaumont 1844), arguably corresponding to the...first to correlate the Damara and Gariep belts of southern Africa with the Ribeira Belt of South America...geochronological data of the Precambrian basement of southern Brazil, Uruguay and Argentina were reported by Hart |  | | Book | | Geochemistry 2. D.R. HUNTER (Editor) Precambrian of the Southern Hemisphere 3. K.C. CONDIE Archean Greenstone Belts...Department of Geological Sciences, Universityof Southern California, Los Angeles, CA 90089, U.S.A. NICOLAS...Department of Geological Sciences, University of Southern California, Los Angeles, CA 90089, USA. P. JONATHAN.... . . . . .......... ....... ....... Lewisian Complex, northwest Scotland . . . . . . . . . . . . . ...Pharusian belt. 63 - Dahomey belt. 64 Damara belt. southern Africa . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | complexes reported to contain a continuous layered sequence from anothosite to leuconorite, norite, mangerite...mangerites might represent the last residual liquid, they do have a higher initial Sr isotope ratio (Demaiffe...anorthosite. The BSL apparently has an exceptionally complex intrusive history which is still not thoroughly...mangerite (MN). ER monzonorites occur mainly in the southern part of the intrusion and consist of relatively...widespread in the Proterozoic Nain anorthosite complex (Wiebe, 1974, 1978). The BSL is intrusive into |  | | Report (issue) | | regional fault in east-central Massachusetts and southern New Hampshire, by Robert F. Novotny_____________...site on the Mullica River in the Wharton Tract, southern New Jersey, by S. M. Lang _____ ----- _______..._________ 318. Correlation of end moraines in southern Rhode Island, by J. P. Schafer_ ______________________...____________ 319. Residual sea water in the basement complex of the Fall Zone in the vicinity ·of Fredericksburg...Artesian water in the Spiritwood buried valley complex, North Dakota, by C. J. Huxel, Jr_ _____ ,,,.. |  | | Report (volume) | | _.... .... __..._ .. _ ._ .. _.. .._ ... _.__. Southern part of the region _ _____ ___ _________________...________________..____ ..___,___ .__._ .._..._______.__.___ Southern New Pass Range _______ ______ ______ _-. _ ________...series which is mostly Oligocene in age, and a southern sequence which contains Oligocene and younger rocks...based on 19 potassium-argon ages). Most of the units do not extend across the entire region nor Bl B2...Mountain Tuff, which is a part of the northern sequence, extends southeastward for at least 70 miles. |  | | Report (volume) | | upper Miocene flora. The basalts consist of plagioclase, subordinate clinopyroxene, variable amounts...porphyritic rocks containing phenocrysts of plagioclase are relatively common. Probable differentiation...only in the accumulation of plagioclase phenocrysts. The basalt sequence in and north of the northern...dark dense basalt, whereas the sequence in and south of the southern half lacks such flows and instead...xenolith in Columbia River Basalt, collected in the southern part of the quadrangle. The little petrologic |  | Almodóvar, G. R., Sáez, R., Pons, J. M., Maestre, A., Toscano, M., Pascual, E. (1997) Geology and genesis of the Aznalcóllar massive sulphide deposits, Iberian Pyrite Belt, Spain. Mineralium Deposita, 33 (1) 111-136 doi:10.1007/s001260050136 | Journal (article/letter/editorial) | | edge of the Iberian Pyrite Belt (IPB) containing complex geologic features that may help to understand the...Phyllite-Quartzite Group (PQ), Volcano-Sedimentary Complex (VSC) and Culm Group. Two sequences can be distinguished...distinguished within the VSC. The Southern sequence (SS) is mainly detritic and includes unusual features...part. In contrast, the AznalcoÂllar-Los Frailes sequence (AFS) contains abundant volcanics, related to...of volcanics is fractional crystallization of plagioclase (+accessories). This process took place in shallow |  | | Journal (article/letter/editorial) | | continental crust. The Narracoota Volcanics in the southern, autochthonous part of the region are dominated...resemble some boninites of the western Pacific. The southern volcanic rocks are interpreted to reflect open-system...petrochemical aspects of the Narracoota Volcanics, on the southern edge of the Capricorn Orogen, are described, and...Volcanics occur in the Glengarry Group, a thick sequence of clastic sediments and volcanic rocks in the...is at the western end of the Nabberu Basin, a complex of lower Proterozoic rocks flanking the northern |  | | Report (volume) | | George, Utah, is about 80 km to the south. The southern area is dominated by the domal Mormon Mountains...Mountains and the eastern end of the Caliente caldera complex about at the Nevada-Utah border. Geologic Studies...ash-flow tuffs in and near the Caliente caldera complex, southeastern Nevada and southwestern Utah By Peter...ash-flow tuffs in and near the Caliente caldera complex, southeastern Nevada and southwestern Utah By L...tuffs and related rocks from the Caliente caldera complex, southeastern Nevada and southwestern Utah By Daniel |  | Toscano, M., Pascual, E., Nesbitt, R.W., Almodóvar, G.R., Sáez, R., Donaire, T. (2014) Geochemical discrimination of hydrothermal and igneous zircon in the Iberian Pyrite Belt, Spain. Ore Geology Reviews, 56. 301-311 doi:10.1016/j.oregeorev.2013.06.007 | Journal (article/letter/editorial) | | TbN/YbN ratios N 1, and c) hydrothermal zircon grains do not display Ce or Eu anomalies, which are widespread...temperatures up to 350 °C and destruction of plagioclase or other Eu+2-hosting minerals. We suggest that...Phyllite–Quartzite Group (PQ), Volcano-Sedimentary Complex (VSC) and Culm Group. In the AZMD, two sequences...can be distinguished within the VSC. The Southern sequence is mainly detrital and includes basaltic pillow-lavas...1998). In contrast, the Aznalcóllar–Los Frailes sequence contains abundant felsic pyroclastic and subvolcanic |  | Childe, F. C., Thompson, J. F. H., Mortensen, J. K., Friedman, R. M., Schiarizza, P., Bellefontaine, K., Marr, J. M. (1998) Primitive Permo-Triassic volcanism in the Canadian Cordillera tectonic and metallogenic implications. Economic Geology, 93 (2) 224-231 doi:10.2113/gsecongeo.93.2.224 | Journal (article/letter/editorial) | | BritishColumbia,contri- of centralBritishColumbia, and a sequence of felsievolcanic bution 83. and intrusive rocks...Energold MiningLtd.,900-543Granville Street,Van- southern eouver,BritishColumbia,CanadaV6C 1XS. suggest...qtz.-pag. porphynj northem sequence 7.• trondhjemite <•[• southern sequence • Triassic KutchoAssemblage...sulfidedeposits. tad andGabrielse, 1986);cappingthe sequence are marine Geologyof the KutchoAssemblage sedimentary...phyritierhyodaeite inthelowerpartofthenorthern sequence The relationship betweenthe twosequences is unclearwith |  | | Journal (article/letter/editorial) | | the deposition of the Skellefte stratigraphic sequence during an extensional tectonic episode. A younger...district at the time when the Skellefte volcanic sequence was generated. Their alternative hypothesis is...pre-1.9 Ga basement represented by the metamorphic complex south of the Bureå Granitoid Belt (Fig. 1). If...cit.) postulate that this metamorphic complex, in their Southern Province, displays an earlier structural...of a major near E– W ductile shear zone in the Southern Province, which cross-cuts the dominant NE trending |  | | Report (issue) | | Higgins and N.J. Soper 79 An Archaean sill complex and associated supracrustal rocks, Arveprinsen...K. Schønwandt 87 The Archaean Atâ intrusive complex (Atâ tonalite), north-east Disko Bugt, West Greenland...Garde and A. Steenfelt 141 Deformation at the southern boundary of the late Archaean Atâ tonalite and...and south of Torsukattak . Boye Sø anorthosite complex .................................................Nunataq ........................... Shear zones in southern Nuussuaq and the boundary between the Nuussuaq |  | | Report (issue) | | Petrogenesis .................................... Plagioclase .......................................... Boulder...hornblende, and potassium feldspar: plagioclase ratios and An content of plagioclase in Boulder Creek Granodiorite...diagrams showing modal variation of quartz, plagioclase, and potassium feldspar for Boulder Creek Granodiorite...Ternary diagrams of modal variation of quartz-plagioclase-potassium feldspar for Twin Spruce Quartz Monzonite...Ternary diagram of modal variation in quartz-plagioclase-potassium feldspar for granite gneiss from the |  | SANDEMAN, H, HANMER, S, DAVIS, W, RYAN, J, PETERSON, T (2004) Neoarchaean volcanic rocks, Central Hearne supracrustal belt, Western Churchill Province, Canada: geochemical and isotopic evidence supporting intra-oceanic, supra-subduction zone extension. Precambrian Research, 134 (1) 113-141 doi:10.1016/j.precamres.2004.03.014 | Journal (article/letter/editorial) | | Churchill Province, Canada, comprises a diverse sequence of Neoarchaean volcanic and less abundant metasedimentary...the SW Pacific, whereby the formation of a thick sequence of coeval, intercalated, compositionally diverse...systematic and mappable stratigraphy. Although complex interfingering and on-lapping of volcanic rocks...intermediate volcaniclastic rocks and then a thick sequence of pillowed to massive basaltic volcanic rocks...of the Carr pluton (Sandeman et al., 2004). The southern package is characterized by small (<40 cm), ovoid |  | | Report (issue) | | published as Report No. 27 (1954). In passing from the southern area to the northern there is a notable change...from a boulder bed intercalated in the volcanic sequence at Thika. More detailed work in recent years failed...square miles of central Kenya in the Central and Southern Provinces, about thirty miles east of Nairobi...square miles in extent and lies partly in the Southern Province of Kenya, administered from Machakos...In general, the eastern half of the section of Southern Province in the area forms part of the Kamba Native |  | KING, PHILIP B., HADLEY, JARVIS B., NEUMAN, ROBERT B., HAMILTON, WARREN (1958) STRATIGRAPHY OF OCOEE SERIES, GREAT SMOKY MOUNTAINS, TENNESSEE AND NORTH CAROLINA. Geological Society of America Bulletin, 69 (8) 947 doi:10.1130/0016-7606(1958)69[947:soosgs]2.0.co;2 | Journal (article/letter/editorial) | | intergrading and intertonguing formations and have complex stratigraphic and structural relations. The Ocoee...by major thrust faults into three sequences, a southern, central, and northern, none of which contains...central sequence where it is more than 13,000 feet thick; it is much thinner in the southern sequence. In...phyllite. Above the Snowbird group in the southern sequence is the Great Smoky group, more than 25,000...marble belt. The Snowbird group in the central sequence is overlain in a few places by coarsergrained |  | | Journal (article/letter/editorial) | | compositional differences of the aliquots. The data do not permit to distinguish beyond any doubt whether...absolute age determinations were collected from a southern, older and northern, younger suite of granitic...15.400 15.404 II. Leucocratic granite of southern sequence S-56 S-57 S-57 r S-57 r S-57' S-57 r S-57...S-96 20.976 16.129 a W.R.: whole-rock; P1. : plagioclase; Kf. : K-feldspar; Mu. : muscovite; Bi. : biotite...comprise Salem-type but also related granotoids that do not possess the characteristical macroscopic properties |  | | Report (issue) | | anorogenic magmatism: The Potrillo volcanic field of southern New Mexico and the Franklin Mountains of west...features along the way. of tectonic models for this sequence within the context of Day 1: The Proterozoic...Red Bluff Granite complex. The intrusive contact between the Red Bluff Granite complex and this large xenolith...contact-metamorphosed by granites of the Red Bluff Granite complex to at least the albiteepidote-hornfels facies....metamorphism from intrusions of the Red Bluff Granite complex, all igneous and sedimentary textures and structures |  | | Report (issue) | | elongated lake at the right end of the image). The southern master faults of the graben, the Venta de Bravo...structure east of the Amealco caldera) and the southern part of the Amealco caldera (note the disrupted...from west to east, the Sierra Puruagua volcanic complex (just west of Tepuxtepec Reservoir), the Altamirano...papers do not comprehensively cover all of the details of the Cenozoic evolution, but they do provide...Mexico at 5,675 meters above sea level, has a complex history that includes self-destruction and rebuilding |  | | Report (issue) | | Ryan Preface INTRODUCTION The Caribbean is a complex region that has attracted a variety of geologic...Surrounding this composite arc terrane are zones of complex tectonic activity, including the Puerto Rico and...Greater Antilles occurred dur- entire volcanic sequence and provides a framework on which other chapters...counterclockwise rotation of north coast carbonate sequence, Puerto Rico: Geophysical Research Letters, v...platform, representative strata of the entire sequence are exposed. The island is subdivided into three |  | | Book | | focussing mainly on the landscapes of the Central and Southern Lakes. The others are revised and rewritten excursions...jewel in the crown of English upland landscapes. Do help to conserve it for future visitors and residents... Note: The details of routes given in this guide do not imply a right of way. Readers are reminded to...SILURIAN 450-405 Ma The Windermere Group of the southern Lake District. Shales and sandstones deposited...difficult to interpret. Structurally they are very complex. Besides having undergone many phases of folding |  | | Report (volume) | | colored rocks) of the Avan Hills mafic-ultramafic complex (Jurassic), western Brooks Range. The emplacement...mechanism of the Siniktanneyak mafic-ultramafic complex, which is also located in the western Brooks Range...is similar to the Avan Hills mafic-ultramafic complex, is the subject of a paper by Morin and Moore in...Gravity models of the Siniktanneyak mafic-ultramafic complex, western Brooks Range, Alaska: evidence for thrust...others, 1985) that compose part of an accretionary complex located seaward of the Contact fault. Volcanogenic |
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