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    Wyświetlanie 1-6 z 6
    Tytuł:
    Constraints on the nature and evolution of the volcanic fields of the Andahua Group, Central Volcanic Zone, southern Peru
    Autorzy:
    Gałaś, Andrzej
    Németh, Károly
    Lewińska, Paulina
    Powiązania:
    https://bibliotekanauki.pl/articles/2201223.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    monogenetic volcanoes
    small lava dome
    petrological modelling
    Andes
    Opis:
    The Andahua Group is a distinct cluster of typically monogenetic volcanoes located in the northernmost part of the Central Volcanic Zone in the Andes, characterized by small-volume lava domes and scoria cones. Seven volcanic clusters have been distinguished. Using satellite imagery, geological mapping, and fieldwork, we found a total of 103 lava domes, 43 scoria cones, and 3 small composite volcanoes. Most of the lava domes are monogenetic but 9 were formed by multiple eruptions. Petrogenetic models have been developed for the magma evolution of the Andahua Group. They show local crustal influence on the magmas generated, and possible controls on the magma pathway to the surface, and potential segregation. Local compositional variation of the crustal rocks is inferred to have a strong influence on the magma that ascends through the thick continental crust. Assimilation and contamination by deeply seated granitoids of the Arequipa and Paracas massifs are also inferred to play a role in the final magmatic products. Future activity with gas emissions from the Andahua Group volcanoes may cause hazardous conditions for tourists.
    Źródło:
    Geological Quarterly; 2022, 66, 3; art. no. 25
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New insights into the early diversification of the Ostracoda: Tremadocian ostracods from the Cordillera Oriental, Argentina
    Autorzy:
    Salas, M.J.
    Vaccari, N.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/22883.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    insight
    early diversification
    Ostracoda
    Tremadocian
    ostracod
    Argentina
    Andes Mountains
    Opis:
    New species of ostracods from the Tremadocian in the northwest region of Argentina are described. These are among the earliest well−documented records of ostracods, which shed new light onto the early diversification of the group. The described fauna consists of seven species, five of which are new: Saltite uchuy sp. nov., Saltite kuraq sp. nov., Conchoprimitia? iglesiasi sp. nov., Orechina violetae sp. nov., and Orechina catalinae sp. nov. The fauna consists primarily of soanellids, a non−dimorphic family of palaeocopids, and of binodicopids. One factor leading to diversification of the group in this region may have been the complex configuration of the northwest basin, which had a restricted pattern of circulation. The distribution of the first ostracods is largely restricted to Gondwana and peri−Gondwana regions. Accordingly, it is possible to envision that the origin or at least an important radiation of the group was centred in this region. Both the Soanellidae and the genus Orechina would have originated in Gondwana and would have become widespread later during the Middle Ordovician. The Tremadocian fauna located in Argentina show significant affinities with fauna located in the warm−water setting of the east Gondwana, mainly in Australia and China.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The extent and volcanic structures of the Quaternary Andahua Group, Andes, southern Peru
    Autorzy:
    Gałaś, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191656.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    lava dome
    pyroclastic cone
    minor volcanic centres
    Andahua group
    Peruvian Andes
    Opis:
    The Quaternary Andahua volcanic group in southern Peru has been studied by present author since 2003. The Andahua Group stretches out at intervals within an area, which is 110 km long and 110 km wide. Seven regions bearing centres of volcanic eruptions have been distinguished: the Valley of the Volcanoes, Antapuna, Rio Molloco, Laguna Parihuana, Rio Colca Valley, Jaran, and Huambo. The Valley of the Volcanoes, where the Andahua Group was identified for the first time, contains the biggest variety of volcanic landforms. The valley is covered by a nearly 60 km long, continuous cover of lava flows. 165 individual eruption centres of the Andahua Group were distinguished including apparent pyroclastic cones, 50–300 m high, and usually smaller lava domes and fissure vents. Domes, eruptive vents and lava craters greatly outnumber pyroclastic cones. Most commonly, lava flows start from lava domes or craters. Small domes are often aligned along their feeding fissures. Lava domes and pyroclastic cones of the Andahua Group are aligned mainly along N–S and WNW–ESE trending fault systems. Projection points of the analysed Andahua lavas on the TAS diagram concentrate in the lower part of the trachyandesite field, entering also the basaltic trachyandesite or trachyte/trachydacite fields.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2011, 81, No 1; 1-19
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault network in Rio Colca valley between Maca and Pinchollo, Central Andes, southern Peru
    Autorzy:
    Żaba, J.
    Małolepszy, Z.
    Gaidzik, K.
    Ciesielczuk, J.
    Paulo, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191912.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    tectonics
    structural geology
    fault activity
    Rio Colca Valley
    Andes
    southern Peru
    Opis:
    The network of faults and joints within the Mesozoic, Miocene and Pleistocene–Holocene formations was studied in the Rio Colca valley, in the Pinchollo–Lari–Maca area (Central Andes, southern Peru). A complex, multi-phase development of these structures was revealed. The results show that the structural framework of the Rio Colca valley consists of WNW–ESE and NE–SW faults, and a few W–E faults. The strike of the most common fault sets is approximately parallel (longitudinal) or perpendicular (transverse) to the W–E oriented strike of stratification surfaces in the Mesozoic sedimentary series and the W–E fold macro-structures, developed in these strata. Diagonal faults and joints are less common, although at some localities they are numerous. The recurrence of major fault systems throughout the Mesozoic and Miocene series and the Pleistocene–Holocene (mainly colluvial) deposits is proof of recent, tectonic activity in the study area. The recent faulting has led to the development of a system of distinct, primary fault scarps, tectonic grabens and horsts, as well as open fissures, which are well marked in the surface morphology, and in many cases have not yet been eroded.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 3; 279--290
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Homage to Ignacy Domeyko at the 200th anniversary of his birth
    Autorzy:
    Narębski, W.
    Wójcik, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/191530.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Domeyko
    Philomat
    Polska
    Lithuania
    Belorussia
    France
    Chile
    geosciences
    ores
    Andes
    chemical mineralogy
    Opis:
    Ignacy Domeyko was born on July 31, 1802 in Niedźwiadka, Novogrodek district. After attending the Piarist College in Szczuczyn he studied at the Vilna University and got the M. Sc. degree in 1822. As member of the illegal Philomat Society was interned till 1829. In 1831 as participant of anti-Russian insurrection had to escape to Prussia, from where moved to Saxony and France. In the years 1832-1838 Domeyko was studying exact and geosciences at Sorbonne and École des Mines. Invited by the Government of Chile was teaching physico-chemical and geo-sciences in the Coquimbo College in La Serena in the years 1838-1846, carrying out large-scale geological and ethnographic field studies as well as chemical-mineralogical investigations. In the years 1846-1884 Domeyko was very active as academic teacher and in the period 1867-1883 as rector of the Chile University in Santiago, continuing research works and reforming local education system. His many-sided activity contributed significantly to economic and educational progress of Chile. In the final stage of his life (1884-1888) Domeyko, as already world-wide known scientist, could visit his homeland and other European countries, as well as Holy Land, but on the way back felt ill and on January 23, 1889 died in Santiago admired and venerated by Chileans as their apostle of science and education. The present paper deals with essential Domeyko's achievements in geosciences. Already during his stay in Paris the results of his observations on sinking of the area of East Prussia in historic times were published and Domeyko has prepared the geographic atlas of the territory of the native Polish-Lithuanian Commonwealth but only its part could be printed. In Chile, apart from didactic activity, accented by edition of handbooks on mineralogy and assaying, Domeyko was carrying out large-scale geological, mining and mineralogical investigations of Andes showing predilection to chemical analyses of collected materials. As follows from the inspection of archival materials, he is the author of at least 160 analyses of various, often chemically very complicated, minerals (including meteorites) and about 60 analyses of waters. This resulted in the discovery of several new minerals which were announced in renowned European periodicals. One of them - copper arsenide - was named by W. Haidinger domeykite. Besides, several Andean fossils sent by Domeyko to France were by A. d'Orbigny and other French palaeontolo- gists named after their discoverer. Following several minor papers on regional geology, including detailed studies of volcanic phenomena, he published in 1878 in Polish a monograph on Chilean Cordilleras and ore deposits, comparing some their fragments with similar horizons in the Polish Carpathians. These and other problems treated by Domeyko in numerous publications are discussed in the present paper. Domeyko's achievements were highly appreciated by several European and American scientific societies and universities by conferring him memberships and honorary doctorates. Moreover, due to his exceptional personality and spirituality, expressed in deeply Christian virtues realized in private and social life, Domeyko is a candidate for beatification. Geoscientists of Poland, Lithuania, Chile, Belorussia, France and other countries are celebrating 200th anniversary of his birth, paying homage to this eminent citizen of the world.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2003, 73, No 1; 1-26
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości mapowania partycypacyjnego w zakresie postrzeganych granic społeczności w centralnych Andach Ekwadorskich
    Autorzy:
    López-Sandoval, María F.
    Salazar, Joel
    Gonzáles, Diego
    Powiązania:
    https://bibliotekanauki.pl/articles/763088.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    participatory mapping
    payments for ecosystem services
    perceived community limits
    the Andes
    Ecuador
    mapowanie partycypacyjne
    płatności z tytułu świadczeń na rzecz ekosystemu
    postrzegane granice społeczności
    Andy
    Ekwador
    Opis:
    This paper presents how participatory mapping can contribute to the understanding of the local meanings of community limits and perceptions about tenure security in agro-pastoral communities of the Andes, which participate in the payments for environmental services (PES) program. Literature about PES sustains that increasing tenure security might be an additional element of participating in such programs. We focused on the “Socio Páramo” conservation program to analyze how the inclusion of land in this program has influenced perception on limits and tenure security for the local communities. With two case studies in the high grasslands (páramo) of Ecuador, we first used sketch maps to elicit how the area inscribed in the PES program has modified the spatial structures of the community territory and what type of limits are found in this territory. Then, we conducted narrative walking to track GPS points with descriptions of land uses, perceived communitarian limits and narratives about meaning or concerns with regard to limits for the community and the relation between the legalized area inscribed in the PES program and tenure security. Maps were produced through GIS support and narratives were analyzed through thematic coding. The study reveals that: a) legal tenure obtained in frame of PES implementation is perceived as a pre-condition to participate in the program and has influenced positively or negatively land tenure security for the entire community; b) knowledge about community limits of páramo is the main concern for elder members, who regard this knowledge as the key element to maintain community cohesion. We conclude that participatory mapping is a powerful tool to elucidate concerns about limits, rules and control over land use and persistence of communitarian life, elements that should be considered when implementing PES.
    W artykule przedstawiono, w jaki sposób mapowanie partycypacyjne może przyczynić się do zrozumienia lokalnych znaczeń w zakresie ograniczeń społeczności i postrzegania bezpieczeństwa posiadania wśród rolno-pasterskich społeczności Andów, które uczestniczą w programie płatności z tytułu świadczeń na rzecz ekosystemu (PES). Literatura przedmiotu wskazuje, że zwiększenie bezpieczeństwa posiadania może być dodatkowym elementem uczestnictwa w takich programach. Autorzy skupili się na programie ochrony „Socio Páramo” w celu przeanalizowania, w jaki sposób włączenie gruntów do tego programu wpłynęło na kwestię postrzegania limitów oraz bezpieczeństwa wśród lokalnych społeczności. Zostały zrealizowane dwa studia przypadków na wysoko położonych pastwiskach (páramo) w Ekwadorze. Najpierw użyto map szkicowych, aby dowiedzieć się, w jaki sposób obszar wpisany w program zmodyfikował struktury przestrzenne terytorium społeczności i jaki typ ograniczeń znajduje się w danej strukturze. Następnie przeprowadzono spacery narracyjne. Badanie ujawniło, że: a) tytuł własności gruntów uzyskany w ramach wdrażania programu jest postrzegany jako warunek wstępny uczestnictwa w programie; b) kwestia wiedzy na temat ograniczeń społeczności páramo jest głównym problemem w przypadku osób starszych, którzy uważają taką wiedzę za kluczowy aspekt, jeśli chodzi o utrzymanie spójności danej społeczności. Wnioskujemy, że mapowanie partycypacyjne jest skutecznym narzędziem służącym wyjaśnianiu obaw dotyczących ograniczeń, zasad i kontroli użytkowania gruntów oraz trwałości życia wspólnotowego, czyli elementów, które należy uwzględnić przy wdrażaniu PES.
    Źródło:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia; 2019, 74
    0137-1983
    Pojawia się w:
    Annales Universitatis Mariae Curie-Sklodowska, sectio B – Geographia, Geologia, Mineralogia et Petrographia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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