Geology and Mineral Resources of Paraguay A Reconnaissance

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102 GEOLOGY AND MINERAL RESOURCES OF PARAGUAYBarclay, W. S., 1909, The River Parana: an economic survey:Geog. Jour., v. 33, p. 1-40, map, London.Interesting account, with notes on the lavas and on geologichistory of cataracts along the Parand and its tributaries.Beder, R., and Windhausen, H., 1918, Sobre la presencia delDevonico en la parte media de la Repiiblica del Paraguay:Bol. Acad. Nac. Cienc. de Cordoba, 23, p. 255-262.Describes fossils from near Arroyos y Esteros; notes on geologicsetting.Beder, R., 1923, Sobre un hallazgo de fosiles permicos en Villarrica:Bol. Acad. Nac. Cienc. de Cordoba, 27, p. 9-12.Brief descriptions of several building-stone quarries thatyielded vertebrate and invertebrate fossils of Santa Catarina(Gondwana) age.Bertoni, A. de W., 1939, Informe sobre rocas conchilianas deVilleta: Rev. de la Soc. Cient. del Paraguay, tomo 4, no. 4,p. 61.Brief notes on fossils of Tertiary age near Villeta.Bertoni, G. T., 1940, Geogr&fia econ6mica nacional del Paraguay:Biblioteca de la Soc. Cient. del Paraguay, Asuncion, Paraguay,235 p., no maps.Chapter 13 (p. 130-139) on "Estructura geologica del Paraguay"summarizes available knowledge of geology. Chapter 17(p. 189-212) on "Las producciones minerales del Paraguay" presentsmany data on metallic and industrial mineral resources,mostly taken from DuGraty (1865),'also contains good discussionof possibility of finding mineral fuels and excellent dataon water power resources.Bertoni, M. S., 1921, Datos preliminares sobre la geologia delParaguay: Rev. de la Soc. Cient. del Paraguay, v. 1, no. 2,Asunci6n.Not seen.Boettner, Ricardo, 1945, Homalonotus en el Paraguay: Re vistaFacultad de Quimica Farmacia, Univ. nac. del Paraguay,Asuncion, Paraguay, v. 1, no. 2, p. 25.Describes Homalonatus sp? from Minas-cue near Itacurubi.1947, Estudio geologico desde Puerto Fonciere hastaToldo-Cue: Rev. Facultad de Quimica Farmacia, Univ.nac. del Paraguay, Asuncion, Paraguay, v. 3, no. 6-7, p.9-14.Description of rocks along a traverse a short distance south ofthe Rio Apa.1952, Fosiles Paraguayos: Rev. del Centro ParaguayoIng., v. 1, p. 31-7, Asuncion.Summary of existing knowledge of Paraguayan fossils andgeologic history of the country.Bottignoli, P. J., 1926, Diccionario Guarani-Castellano y Castellano-Guarani:Asunci6n, 114 p.Bilingual dictionary, useful in translating names of places andnatural features.Bowman, Isaiah, 1909, The physiography of the Central Andes:Am. Jour. Sci., 4th ser., 28, p. 197-217, 373-402.Camargo, Mendes, J., 1951, Estratigrafia e malacofauna daformacao Corumbatai: Div. Geol. Min., Mon. 13, Rio deJaneiro.Carnier, Karl, 191 la, Reisen in Mato Grosso und Paraguay,Mitt, der Geog. Gesell, Miinchen, v. 6, p. 18-44.Superseded by Carnier, 191 Ic, which has many more details.1911b, Uber das Alter Holzer aus dem Randgebiet vonVilla Rica in Paraguay. Mitt, der Geog. Gesell., Munchen,v. 6, p. 430-431.Brief description of fossil woods from Villarrica, Maciel, andnear the Rio Parana.191 Ic, Paraguay, Versuch zu einer morphologischenBetrachtung der Landschaftformen, Mitt. Geog. Gesell.(fur Thuringen) v. 29, p. 1-50, Jena.Excellent description, with sketch cross sections and geologicmap, of geology and physiography particularly between Rio Apaand Rio Aquibadan, but including discussion of Amambayregion and area between Villarrica and Asuncion. Petrology ofsamples collected by Carnier described by Goldschlag (1913a).1913, Einige Bemerkungen uber die isolierten Gebirge imTieflande des Paraguay: Mitt, der Geog. Gesell. (furThuringen), v. 8, p. 7-17, Jena.Brief description of parts of northern Paraguay and southernMato Grosso, Brazil, with notes on augite syenite of Pao d'Acucarand Tres Hermanos hills and porphyry of Fuerte Olimpo.Clarke, J. M., 1897, Afauna Siluriana Superior do Rio Trombetas,Estado do Para, Brasil: Archives do Mus. Nac. do Rio deJaneiro, v. 10, 1897-1899, p. 1-174, pis. 1-8.Conradi, Sergio, 1935, Informe sobre los trabajos geologicosrealizados en el viaje a Pedro Juan Caballero: Rev. delJardin Botanico y Mus. de Historia Nat., v. 4, p. 63-81,Asunci6n.Geologic notes, with several cross sections, of a traverse fromConcepci6n to Pedro Juan Caballero and along the SierraAmambay. Includes excellent descriptions of the Serra Gerallavas and of the subjacent sandstone in this area.Cross, Whitman, 1897, The igneous rocks of the Leucite Hillsand Pilot Butte, Wyo.: Am. Jour. Sci., ser. 4, v. 4, p.115-141.Describes an amphibole similar to that in shonkinite fromMbocayaty.Dana, J. D., 1914, System of mineralogy: New York, Wiley &Sons, 6th ed., p. 609.Describes hydronephelite.Decoud, Hector Francisco, 1906, Geografia de la Republica delParaguay, 5th ed., Leipzig, Brockhaus, 127 p.Not seen.DeMersay, Alfredo, 1860, Histoire physique, economique etpolitique du Paraguay et des etablissements des Jesuits:Librairie de L. Hachette et Cie, Paris, 486 p. plus atlas ofmaps.Interesting account, with many useful notes on geology andmineral resources.
REFERENCES AND ANNOTATED BIBLIOGRAPHY 103Derby, O. A., 1878, Geologia da regiao diamantifera da provinciado Parana no Brasil: Arch. Mus. Nac. v. 3, p. 89-96.First known description of Parana trap rock (here calledSerra Geral lavas). Not seen.1887, 1891. On nepheline rocks in Brazil: Quart. Jour.Geol. Soc. (London), v. 43, p. 457-473 and v. 47, p. 251-265.Excellent description of alkaline rocks in eastern Brazil.1898, A study in consanguinity of eruptive rocks: Jour.Geology, v. 1, p. 597-605.Principally a discussion of alkaline rocks in eastern Brazil butcontains brief mention of foyaite and augite-syenite from Paod' A§ucar.Dorr, J. V. N., 1945, Manganese and iron deposits of Morro doUrucum, Mato Grosso, Brazil: U. S. Geol. Survey Bull.946 A, p. 1-47.DuGraty, A. M., 1865, La Republique de Paraguay, 2d ed.,Brussels, C. Muquardt, 407 p.Includes many data on geography, hydrology and climate withnumerous notes on lithology and mineral resources (latter inchap. 6, p. 273-301). Also includes useful glossary of Guaraniterms.Du Toit, A. L., 1927, A geological comparison of South Americawith South Africa: Carnegie Inst. Washington Pub. no. 381,158 p.Eckel, E. B., and Maz6, Ricardo, 1952, Posibilidad de establecerindustrias minerales en el Paraguay: Rev. del CentroEstudiantes de Cienc. Econ. 13, no. 110, p. 45-51, Asunci6n.Preliminary report, superseded by this paper.Evans, J. W., 1894, The geology of Mato Grosso (particularlythe region drained by the upper Paraguay): Quart. Jour.Geol. Soc. (London), v. 50, p. 85-104.Includes brief description on page 100 of augite-syenite fromPao d'A§ucar and vicinity.Freitas, Ruy Ozorio de, 1944, Jazimento das rochas alkalinasno Brasil meridional: Minera§ao e Metal, v. 8, no. 43,p. 45-48.Fries, C., Schaller, W. T., and Glass, J. J., 1942, Bixbyite andpseudobrookite from the tin-bearing rhyolite of the BlackRange, N. Mex.: Am. Mineralogist, v. 27, p. 305-322.Discusses occurrences of pseudobrookite comparable withthat in Serra Geral lavas.Gerth, Heinrich, 1932-41, Geologic Sudamerikas: 3 v., GebriiderBorntraeger, Berlin.Excellent compilation of available geologic facts on SouthAmerica.Goldschlag, M., 1913a, Beitrag zur Kenntnis der PetrographieParaguays und des angrenzenden Gebietes von MatoGrosso: 59 p., Inaug. diss., Jena.Detailed petrologic description, with many analyses, of rocksamples collected by Carnier, 1911.Goldschlag, M., 1913b, Zur Petrographie Paraguays und MatoGrosses: Mitt, der Geog. Gesell., Miinchen, v. 8, no. 3,p. 293-301.Condensation of material given by Carnier (191 la) andGoldschlag (1913a).Gordon, Mackenzie, Jr., 1947, Classification of the Gondwanicrocks of Parana, Santa Catarina, and Rio Grande do Sul:Dept. Nac. de Produ§ao Min., Div. de Geol. e Min., NotasPreliminares no. 38a, 19 p., Rio de Janeiro.Guimaraes, Djalma, 1947, Origin das rochas alcalinas MinasGerais: Inst. Tech. Ind., v. 5, 104 p.Hanson, E. P., Editor, 1950, New World guides, III, LatinAmerican Republics: Duell, Sloan & Pearce, New York,3ded.Harrington, H. J., 1950, Geologia del Paraguay Oriental: Contr.Cient., ser. E, Geologia, Univ. de Buenos Aires, to mo 1,82 p., map and plates.Excellent modern description of geology, stratigraphy, andpaleontology, with geologic map (1 inch=47 mi.) of easternParaguay.1956, Paraguay, in Handbook of South Americangeology: Geol. Soc. America Mem. 65, p. 99-114.Contains essentially the same material, in English, as appearsin Harrington (1950).Hibsch, J. Em., 1891, Einige Gesteine aus Paraguay: TschermaksMineralog. Petrog. Mitt., 12, p. 253-255, Wien.Describes specimens of nepheline basalt from Cerro Ybytymiand quartz porphyry from near Lago Ypoa, collected by Jordan(1893).Jerman, Ludwig, 1898, Der Unterlauf des Igatimi: Mitt, derGeog. Gesell., Hamburg, v. 14, no. 4, 28 p.Not seen.Johnston, Keith, 1876, Notes on the physical geography ofParaguay: Royal Geog. Soc., Proc., v. 20, p. 494-504.Good general description; no geologic observations.Jordan, Paul, 1893, Ueber meine Reisen in Paraguay: Mitt, derGeog. Gesell., Wien, v. 36, p. 627-655.Includes description of Sierra Ybyturuzu; rocks collected byJordan are described by Hibsch (1891). Not seen.Kanter, Helmuth, 1936, Der Gran Chaco und seine Randgebiete:Hamburg, Hansiche Univ., 376 p.Good description of natural history, including surface geologyof the Gran Chaco and surrounding areas. Contains smallscalesketch map of geology.Kennedy, W. A., 1933, Trends of differentiation in basalticmagmas: Am. Jour. Sci., 5th ser., v. 25, p. 239-256.Kerr, Sir John Graham, 1950, A naturalist in the Gran Cbaco:Cambridge Univ. Press, 229 p., ills.Excellent background material on Gran Chaco natural history;contains a few minor notes on geology.
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Geology and MineralResources of Par
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UNITED STATES DEPARTMENT OF THE INT
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IVCONTENTSMineral resources._______
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GEOLOGY AND MINERAL RESOURCES OF PA
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INTRODUCTION(1947, 1952) are the on
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GEOGRAPHYFIGURE 1. Index map showin
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GEOGRAPHYbisects the Republic of Pa
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GEOGRAPHY 9thorny semidesert plants
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GEOLOGY 11chiefly logs, rough lumbe
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IGNEOUS AND METAMORPHIC ROCKS 13and
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15FIGURE 7. Arkosic sandstone (spec
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IGNEOUS AND METAMORPHIC ROCKS 17FIG
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IGNEOUS AND METAMOKPHIC ROCKS 19acc
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IGNEOUS AND METAMOEPHIC ROCKS 23TAB
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25FIGURE 18. Ehyolite (specimen P-3
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IGNEOUS AND METAMORPHIC ROCKS 29PET
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IGNEOUS AND METAMORPHIC ROCKS 31DIA
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IGNEOUS AND METAMOEPHIC ROCKS 33a d
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GEOLOGICAL SURVEY PROFESSIONAL PAPE
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36 GEOLOGY AND MINERAL RESOURCES OF
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42dated by two kinds of porphyry. O
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44FJGTJEE 34. Porphyry (specimen P-
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Geology and Mineral Resources of Paraguay A Reconnaissance

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