En esta sección se compilan diversas publicaciones realizadas por miembros del SEGEMAR en contextos de cooperación internacional. https://repositorio.segemar.gov.ar/handle/308849217/4791 2026-04-12T23:55:45Z 2026-04-12T23:55:45Z Argentina. Dirección General de Minas y Geología https://repositorio.segemar.gov.ar/handle/308849217/4981 2025-12-16T13:19:56Z 1946-01-01T00:00:00Z

Tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en el Río Pilcomayo Argentina. Dirección General de Minas y Geología El Tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en el Río Pilcomayo registra 3 informes que conforman el Expediente N° 126405-46 bajo la autoría institucional de la Dirección General de Minas y Geología, dependiente de la Secretaría de Industria y Comercio, en total 3 informes mecanografiados con los siguientes datos: - Tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en el Río Pilcomayo, desglosado del Expediente N° 126.405-46, elaborado el 8 de abril de 1946, que incluye 7 artículos firmados por César Ameghino y Francisco L. Pecci, más un texto titulado "Protocolo especial anexo al tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en el Río Pilcomayo", con 19 artículos firmados por ambos autores y un "Informe final de la comisión mixta de límites Argentino-Paraguaya", firmado por Ramón Díaz Benza, Fernando Saguier Caballero, Luis A. Podestá Costa, Otto H. Helbling e Isaías Rafael Cordini, con fecha 16 de agosto de 1944, en Asunción del Paraguay. - Protocolo especial anexo al tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en Río Pilcomayo, cuenta con 19 artículos firmados por César Ameghino y Francisco L. Pecci y otra versión del mismo documento finalizado el 16 de agosto de 1944. - Tratado complementario de límites definitivos entre las Repúblicas Argentina y del Paraguay en el Río Pilcomayo, otra versión mecanografiada de los 7 Artículos firmados por Ameghino-Pecci. Los 3 informes integran una carpeta donde se establece el tratado elaborado entre ambos países con el propósito de dar solución definitiva a la cuestión de límites en el Río Pilcomayo, en la zona comprendida entre los puntos denominados "Horqueta" y "Salto Palmar", a la cual se refiere el Tratado Complementario de Límites del 5 de julio de 1939 y el Protocolo Especial Anexo al mismo. Fil: Secretaría de Industria y Comercio. Dirección General de Minas y Geología; Argentina.; El informe se encuentra disponible en soporte papel en la delegación SEGEMAR Buenos Aires, Mapoteca Felipe Enrique Godoy Bonnet del IGRM, ubicación A-20-12. En caso de requerir la consulta, por favor escribir al correo biblioteca.segemar@segemar.gov.ar

1946-01-01T00:00:00Z Biñón, Héctor H. https://repositorio.segemar.gov.ar/handle/308849217/4923 2025-11-06T14:57:24Z 2000-01-01T00:00:00Z

Tratado de integración y complementación minera entre la República Argentina y Chile Biñón, Héctor H. El presente informe ilustra el tratado binacional fundamentado principalmente en el acuerdo de complementación económica n°16 que dice convenir y ejecutar decisiones destinadas a facilitar el desarrollo de diversas actividades en el ámbito económico y entre ellas al estímulo a las invenciones recíprocas y a la complementación y coordinación para el desarrollo del sector minero. Como objetivos el tratado permite a los inversionistas de las partes la exploración, explotación y comercialización de los recursos minerales que se encuentran en la zona fronteriza de ambos países. Fil: Biñón, Héctor H. Ministerio de Economía. Subsecretaría de Minería de la Nación. Servicio Geológico Minero Argentino; Argentina.; El informe se encuentra disponible en soporte papel en la delegación SEGEMAR Tucumán, en caso de requerir la consulta, por favor escribir al correo biblioteca.segemar@segemar.gov.ar

2000-01-01T00:00:00Z Carcavilla, Luis Miranda, Fernando Faraone, Mauricio Vargas Anaya, Marianela https://repositorio.segemar.gov.ar/handle/308849217/4784 2025-12-01T13:38:30Z 2024-01-01T00:00:00Z

ASGMI. Sitios de interés geológico de Iberoamérica Carcavilla, Luis; Miranda, Fernando; Faraone, Mauricio; Vargas Anaya, Marianela Esta publicación incluye 73 sitios o lugares de interés geológico distribuidos en el territorio continental e insular de 16 países Iberoamericanos (Argentina, Brasil, Chile, Colombia, Costa Rica, Cuba, Ecuador, El Salvador, España, Guatemala, México, Paraguay, Perú, Portugal, República Dominicana y Uruguay). Cada capítulo está dedicado a un país y presenta un mapa de ubicación de los sitios considerados, la descripción de sus principales características geológicas, aspectos sobre medidas de protección e información general para su visita. Los sitios incluidos abarcan gran parte de las disciplinas geológicas y aportan al conocimiento y divulgación de la geología como ciencia. Esta publicación, surgida desde el Grupo de Expertos en Patrimonio Geológico (GEPG) de la Asociación de Servicios de Geología y Minería Iberoamericanos (ASGMI), resalta el valor de la geodiversidad y el patrimonio geológico como elementos fundamentales para el desarrollo económico y social de las comunidades. La puesta en valor de estos recursos, tal y como se refleja en la presente obra, es clave para la promoción de iniciativas como los Geoparques y el turismo geológico, y para fomentar una mayor conciencia sobre la importancia de preservar nuestro patrimonio geológico, como testimonio invaluable de la historia de nuestro planeta y recurso estratégico para las generaciones futuras. Se incluye título y autoría de los trabajos presentados por los geólogos y geólogas del SEGEMAR: La Mejicana y el cablecarril: patrimonio testigo de la minería argentina de principios del siglo XX / Ramón Carrizo -- El triásico de la cuenca de Ischigualasto-Talampaya: una ventana hacia el origen de los dinosaurios y los mamíferos / Carlos Nelson Dal Molin -- Los cerros Fitz Roy y Torre "gritos de piedra" / Andrés Kosmal y Fernando Miranda -- Cerro Galán: una mega-caldera en el noroeste argentino / Eduardo Molina y Marina Corvalán -- El “agua grande” de fama mundial / Fernando Miranda, Alberto Ardolino y Eduardo Salamuni (perteneciente al Departamento de Geología de la Universidad Federal del Paraná). Fil: Miranda, Fernando. Servicio Geológico Minero Argentino; Instituto de Geología y Recursos Minerales; Argentina.; Fil: Carrizo, Ramón. Servicio Geológico Minero Argentino; Instituto de Geología y Recursos Minerales; Argentina.; Fil: Dal Molin, Carlos Nelson. Servicio Geológico Minero Argentino; Instituto de Geología y Recursos Minerales; Argentina.; Fil: Molina, Eduardo. Servicio Geológico Minero Argentino; Instituto de Geología y Recursos Minerales; Argentina.; Fil: Corvalán, Marina. Servicio Geológico Minero Argentino; Instituto de Geología y Recursos Minerales; Argentina.

2024-01-01T00:00:00Z Lyons, Patrick Skirrow, Roger G. Stuart-Smith, Peter G. https://repositorio.segemar.gov.ar/handle/308849217/2751 2025-10-27T14:43:00Z 1997-01-01T00:00:00Z

Report on Geology and Metallogeny of the “Sierras de Septentrionales de Córdoba” 1:250.000 Map Sheet Province of Córdoba Geoscientific Mapping of the Sierras Pampeanas, Argentine-Australian Cooperative Project Lyons, Patrick; Skirrow, Roger G.; Stuart-Smith, Peter G. Geology The Sierras septentrionales de Córdoba sheet area is located in the northern Sierra Grande and Sierra Chica. They form part of the southern Sierras Pampeanas which are part of a distinct morphotectonic province of tilt blocks of Early to Mid Paleozoic metamorphic and igneous basement. Recent work, as part of the Argentina-Australia Cooperative Project, has shown that basement in the sheet area is part of the Pampean domain intruded by Cambrian, Ordovician, and Devonian granitoids. The domain is comprised of a number of metamorphic complexes and formations, the Ascochinga Igneous Complex, and some major shear zones, most notably the Guamanes Shear Zone. The oldest basement rocks are principally metapelite, calc-silicate and marble, and minor amphibolite which reached amphibolite grade conditions (M1; high T, low P), with localised migmatisation, about 530 Ma. Localised melting produced a number of S-type granites which probably crystallised about 10 to 15 Ma later. East of the Carape Fault, in the Sierra Chica, the Early Cambrian Ascochinga Igneous Complex, consisting of tonalite, granodiorite, granite and minor enclaves of paragneiss, probably crystallised at about 515 Ma. Protolith sediments were deposited on the passive western margin of Gondwana which developed during the separation of Laurentia from Gondwana, and the opening of the Iapetus Ocean, at the beginning of the Cambrian about 540 Ma. Following intrusion of mafic dykes, progressive deformation (D1) and metamorphism (M1) produced the penetrative differentiated foliation formed during the westerly directed thrusting of the Pampean cycle. Compressive deformation, closely followed by extension, possibly as a continuos event, (D2) and lower amphibolite/upper greenschist metamorphism (M2) during the Early Ordovician (490-470 Ma) resulted in tight folding of D1 fabrics and development of gneissic fabrics in the Ascochinga Igneous Complex. Thrusting occurred on the Carape Fault and within the El Manzano Formation. First movement on the Guamanes Shear Zone probably occurred at this time. Phyric granites within the Guamanes Shear Zone are interpreted to have been emplaced during extension, around 470 Ma. The Ordovician deformation, the Famatinian cycle, resulted from the closure of the Iapetus Ocean and eastward subduction beneath the Gondwana continent. The resumption of convergence on the Gondwana margin in the Early Devonian, during the Achalian cycle, resulted in the reactivation of the Guamanes Shear Zone and local isoclinal folding of earlier fabrics (D3), greenschist facies metamorphism (M3), and the development of a magmatic arc which generated large volumes of felsic magma from partial melting of MgO depleted crust. Devonian granites in the sheet area were emplaced at this time and magnetics indicate that a number of plutons have not been uncovered, or are buried beneath Cainozoic cover. Small bodies south of the Capilla del Monte Granite are apophyses of a larger body. The Achalian cycle continued until the end of the Devonian, as evidenced by 40Ar-39Ar dates from the Guamanes Shear Zone. Peneplanation of the basement was followed by deposition of fluvio-lacustrine sediments of the Carbo-Permian Panganzo Group which are preserved in a graben in the north-west of the sheet area. Graben formation may have initiated at this time and continued (episodically?) until the Early Cretaceous, when extension accommodated on the Punilla and La Calera Faults formed half-grabens accompanied by the deposition of continental clastic material and extrusion of mafic lavas. Block tilting of basement during the Cainozoic Andean uplift gave rise to the present day topography. Uplift occurred on moderate to steeply dipping reverse faults. Economic Geology Three principal Paleozoic metallogenic cycles and one Neogene cycle are recognised in the southern Sierras Pampeanas, including the Sierras de San Luis and Comechingones. The first two metallogenic stages are closely related to the Famatinian (early Ordovician) tectonic and magmatic cycle, and the third major period of mineralisation occurred during the Achalian (Devonian) tectonic cycle. The most important metallic mineral deposits in the Sierras septentrionales de Córdoba broadly correlate with the Achalian (Devonian) tectonic cycle which constitutes the third metallogenic phase in the southern Sierras Pampeanas. It is characterised by diverse deposits of Au, W, Ag, Pb, Zn, Cu, and a second period of pegmatite-related mineralisation including Be, Li, Nb, Ta, U, REE, Th and F. The deposit styles include mesothermal shear-related Au quartz vein deposits in the Candelaria, high-level Ag-Pb-Zn quartz veins in the El Guaico district and W-quartz vein deposits near Aguas de Ramón. Epigenetic W±Cu deposits hosted mainly by calc-silicate rocks in the Punilla region of the Sierras de Cór doba (e.g., El Zinqui) are proposed to have formed during the Achalian phase. Regional mapping and metallogenic modelling have allowed delineation of zones of potential for Au, Ag- Pb-Zn, Cu and W mineralisation in the Sierras septentrionales de Córdoba, focussed on Devonian structures and granites and suitable chemical and structural trap environments. New 40Ar-39Ar dating of white mica hydrothermal alteration associated with shearrelated Au±Cu, W vein and Ag-Pb-Zn vein mineralisation in the southern Sierras Pampeanas suggests mineralisation occurred from about 390 to 360 Ma. This metallogenic phase commenced during the period of Devonian felsic magmatism, which includes granites yielding U-Pb (zircon) crystallisation ages of about 403 to 382 Ma. Throughout the Sierras Pampeanas, these granites are fractionated, peraluminous to borderline-metaluminous, oxidised to weakly reduced, magnetic to non-magnetic S- and I-types, and form zoned ovoid plutons that were emplaced at relatively high crustal levels synchronous with compressive deformation. Oxygen and hydrogen isotope compositions of alteration and vein minerals are compatible with input of evolved meteoric fluids with or without a minor component of magmatic or metamorphic waters in the formation of the Au±Cu, W and Ag-Pb-Zn deposits. The Neogene metallogenic cycle is characterised by epithermal Au (-Ag-Pb-Zn) and porphyry-style Cu mineralisation formed in association with Miocene-Pliocene volcanism in the La Carolina - Sierra del Morro volcanic belt of San Luis Province. Volcanic rocks of similar composition and age occur in the Volcán Pocho region, south of the Sierras septentrionales de Córdoba area. Exploration for epithermal Au- Ag in this region has been relatively limited. Fil: Lyons, Patrick. Australian Geological Survey Organisation; Australia.; Fil: Skirrow, Roger G. Australian Geological Survey Organisation; Australia.; Fil: Stuart-Smith, Peter G. Australian Geological Survey Organisation; Australia.

1997-01-01T00:00:00Z Sims, John P. Skirrow, Roger G. Stuart-Smith, Peter G. Lyons, Patrick https://repositorio.segemar.gov.ar/handle/308849217/2750 2025-10-27T14:47:13Z 1997-01-01T00:00:00Z

Report on Geology and Metallogeny of the "Sierras de San Luis y Comechingones" 1:250.000 Map Sheet Provinces of San Luis and Córdoba Geoscientific Mapping of the Sierras Pampeanas, Argentine-Australian Cooperative Project Sims, John P.; Skirrow, Roger G.; Stuart-Smith, Peter G.; Lyons, Patrick Geology The Sierras de San Luis y Comechingones map area covers 12 000 km2 extending from east of the Sierras de Comechingones to west of the Sierras de San Luis. The city of San Luis is located in the south west of the map area. The ranges form the southernmost part of the Sierras Pampeanas morphotectonic province of basement tilt blocks. Recent work, as part of the Geoscientific Mapping of the Sierras Pampeanas Argentine- Australian Cooperative Project, has shown that the basement is comprised of three lithostratigraphic domains, a Cambrian domain, a Cambro Ordovician domain and a younger Ordovician domain. These three domains have shared a common tectonic history since the Early Devonian. The Cambrain domain is comprised of the Monte Guazú, Conlara and Nogoli metamorphic complexes. These rocks consist of pelitic and psammitic gneiss and schist with subordinate orthogneiss. The meta-sedimentary protoliths are interpreted to have deposited on the a passive margin during the separation of Laurentia from Gondwana and the opening of the Iapetus Ocean at around 540 Ma. Deformation and upper amphibolite- to granulite-facies metamorphism of the Pampean cycle had commenced by about 530 Ma and occurred during convergence on the newly created margin of Gondwana. Widespread magmatism at the closing stages of the cycle produced granitoids within the Monte Guazú Metamorphic Complex and possibly the Nogoli Metamorphic Complex at around 515 Ma(?). The Cambro Ordovician domain consists of pelitic gneiss and schist of the Pringles Metamorphic Complex. The protoliths to these metasediments were probably deposited in a back-arc basin formed within the older basement, coincident with the commencement of subduction along the margin of Gondwana in the latest Cambrian. During the Early Ordovician widespread compressive deformation, metamorphism, and magmatism of the Famatinian cycle resulted in amalgamation of the back arc basin with the Cambrian basement. Mafic and ultramafic bodies of the Las Aguilas Group intruded the Pringles Metamorphic Complex at ~480 Ma and provided a significant heat source for high-grade metamorphism. Deformation at upper amphibolite- to granulite-facies was accompanied by the development of kilometre-scale ductile shear zones. Towards the close of the Famatinian cycle, discrete belts of extensional tectonism developed at upper greenschist-facies conditions accompanied by emplacement of S-type granite and pegmatite. New U-Pb monazite data suggests that the Famatinian tectonism had ceased and the terrain was cooling by approximately 450 Ma. The Ordovician domain comprises the San Luis Formation, which consists of phyllites, arenites and minor conglomerates. These low-grade metasediments were deposited during the Famatinian cycle and are intruded by granitoids that have been dated at about 470 Ma. The absence of Famatinian tectonic fabrics in these rocks suggests they were deposited in a basin formed during the late extensional phase. The resumption of convergence on the Gondwana margin in the Early Devonian, resulted in compressive deformation of the San Luis Formation, and older basement rocks. This important tectonic episode is termed the Achalian cycle. Partial melting of crust during this tectonism produced voluminous felsic magmas which intruded during and after shearing. The magmatism had commenced by about 404 Ma and may have continued until the Early Carboniferous. Deformation was at greenschist facies and produced westerly directed thrusting and regionally extensive ductile to brittle-ductile, conjugate, strike-slip shear-zones. New 40Ar-39Ar data shows the shearing had ceased by approximately 350 Ma. Subduction of the Nazca Plate resulted initially in Andesitic volcanism at the start of the Andean cycle in the Mid Miocene. The volcanism resulted in basement uplift with volcanic edifices and extensive pyroclastic aprons. Following cessation of volcanism in the Pliocene, continuing east-west compression has resulted in uplift of the basement along moderate to steeply dipping reverse faults. Metallogeny Three principal Paleozoic metallogenic cycles and one Neogene cycle are recognised in the southern Sierras Pampeanas, including the Sierras de San Luis and Comechingones. The first two metallogenic stages are closely related to the Early Ordovician Famatinian tectonic and magmatic cycle, and the third major period of mineralisation occurred during the Devonian Achalian cycle. The earliest metallogenic stage includes Ni-Cu-Co sulfide deposits with anomalous PGEAu hosted by mafic/ultramafic intrusions, in the Las Aguilas district. Sulfide mineralisation formed initially in magmatic cumulate zones, with partial remobilisation during deformation. New U-Pb (zircon) age dating indicates that differentiates of the tholeiitic parent magma crystallised during the early Ordovician at 478±6 Ma, approximately coeval with Famatinian high grade metamorphism and compressive deformation. A resource of 2.2 Mt at 0.51% Ni and 0.50% Cu has previously been estimated. Regional mapping and metallogenic modelling indicates potential for Ni-Cu mineralisation in several exposed and concealed zones elsewhere in the Sierras de San Luis. The second metallogenic phase is spatially and temporally related to extensional deformation of the final stages of the Famatinian cycle. Historically important deposits of Li, Be, Nb, Ta, Sn, and currently exploited industrial mineral resources (mica, feldspar, quartz), are associated with granites and voluminous pegmatites emplaced during this and the Achalian cycles. The third phase of metallogenic evolution in the southern Sierras Pampeanas is broadly correlated with the Achalian cycle, and is characterised by diverse deposits of Au, W, Ag, Pb, Zn, Cu, and a second period of pegmatite-related mineralisation including Be, Li, Nb, Ta, U, REE, Th and F. New 40Ar-39Ar dating of white mica hydrothermal alteration associated with shear-related Au±Cu, W vein and Ag-Pb-Zn vein mineralisation in the southern Sierras Pampeanas suggests mineralisation occurred from about 390 to 360 Ma, including at least some of the W mineralisation in the Sierra de Los Morillos. This metallogenic phase commenced during the period of Devonian felsic magmatism, which includes granites yielding U-Pb (zircon) crystallisation ages of about 403 to 382 Ma. Oxygen and hydrogen isotope compositions of alteration and veins minerals are compatible with input of evolved meteoric fluids with or without a minor component of magmatic or metamorphic waters in the formation of these Au±Cu, W and Ag-Pb-Zn deposits. Numerous tungsten deposits hosted in calc-silicate rocks in the Sierras del Morro, Yulto and Estanzuela are proposed to be epigenetic in origin and to have formed during the Devonian metallogenic phase. However, it is conceivable that minor tungsten accumulated in calc-silicate rocks prior to the Devonian and was remobilised during the Achalian cycle. Localisation of quartz-scheelite vein deposits and possibly some Au±W quartz vein deposits in the Sierras de San Luis in structures characteristic of the Achalian cycle suggests these deposits also formed during the Devonian metallogenic cycle. Structural studies and metallogenic modelling have been used to outline areas of potential for shear-related mesothermal Au in the Sierras de San Luis. The Neogene metallogenic cycle is characterised by Au (-Ag-Pb-Zn) and Cu mineralisation formed in association with Miocene-Pliocene volcanism in the La Carolina - Sierra del Morro volcanic belt. Alteration, geochemical, and geological characteristics of the Au mineralisation indicate metal deposition in the upper levels of low sulfidation epithermal systems, controlled in part by Tertiary and pre-Tertiary structures. Quartz-chalcopyrite vein stockworks and alteration in andesite breccia at Diente Verde suggest the existence of porphyry Cu style mineralisation in the La Carolina - Sierra del Morro volcanic belt. Despite the extent of this belt, exploration for Au-Ag and Cu in this region has been relatively limited. Fil: Sims, John P. Australian Geological Survey Organisation; Australia.; Fil: Skirrow, Roger G. Australian Geological Survey Organisation; Australia.; Fil: Stuart-Smith, Peter G. Australian Geological Survey Organisation; Australia.; Fil: Lyons, Patrick. Australian Geological Survey Organisation; Australia.

1997-01-01T00:00:00Z