Matches in SemOpenAlex for { <https://semopenalex.org/work/W1580459230> ?p ?o ?g. }
Showing items 1 to 47 of
47
with 100 items per page.
- W1580459230 endingPage "200" @default.
- W1580459230 startingPage "187" @default.
- W1580459230 abstract "RESUMEN. Rocas volcanicas de edad paleocena-eocena que corresponden a la Formacion Ventana, en las cercanias de San Martin de los Andes, han sufrido metamorfismo regional de muy bajo grado con facies de ceolita, prehnita, pumpellyita y transicional a esquistos verdes. Las asociaciones morfologicas mas comunes observadas son: esmectita-iddingsita-serpentina; esmectita-heulandita-mordenita; wairakita-Iaumontita-albita; wairakita-laumontita-pumpellyita-epidota; pumpellyita-esmectita-epidota-titanita; prehnita-hematita-interestratificados de esmectita/clorita-titanita; interestratificados de esmectita/clorita-epidota-actinolita-titanita-albita-cuarzo. El metamorfismo tuvo lugar bajo condiciones de alta fugacidad de oxigeno en la fase fluida indicada por la coexistencia de hematita, epidota (pistacita) y pumpellyita. Cuatro zonas de metamorfismo progresivo fueron establecidas y de acuerdo a las asociaciones minerales encontradas, el metamorfismo habria alcanzado una temperatura de 300°C a presiones menores que 2 kb. Las zonas halladas son: A- esmectita-heulandita; B- laumontita-wairakita; C- prehnita-pumpellyita; D- epidota-actinolita. Los minerales diagnosticos: heulandita, laumontita, wairakita, prehnita, pumpellyita, epidota y actinolita, sugieren que la evolucion metamorfica habria tenido lugar en areas de intrusiones igneas emplazadas en altos niveles de la corteza. ABSTRACT. Very low-grade metamorphism in volcanic rocks of Formacion Ventana, San Martin de los Andes, Neuquen, Argentina. Paleocene-Eocene volcanic rocks of the Formacion Ventana, near San Martin de los Andes, have been affected by very low-grade regional metamorphism under zeolite, prehnite-pumpellyite and transitional to greenschists facies conditions. The mineral assemblages commonly observed are: smectite-iddingsite-serpentine; smedite-heulanditemordenite; wairakite-Iaumontite-albite; wairakite-Iaumontite-pumpellyite-epidote; pumpellyite-smectite-epidote-titanite; prehnite-hematite-interstratified smectite/chlorite-titanite; interstratified smectite/chlorite-epidote-actinolite-titanite-albitequartz. Metamorphism took place under oxidizing conditions (high f02) in the fluid fase, indicated by the stable existence of hematite, epidote (pistacite) and pumpellyite. Four progressive metamorphic zones have been establishea and according to the mineral assemblages, the maximum temperature could have reached 300°C and the pressures 2 kbar. Those zones are: A- smectite-heulandite; B- wairakite-Iaumontite; C- prehnite-pumpellyite; D- epidote-actinolite. The diagnostic minerals: heulandite, laumontite, wairakite, prehnite, pumpellyite, epidote and actinolite suggest that the metamorphic evolution took place in an area characterized by the presence of shallow igneous intrusions." @default.
- W1580459230 created "2016-06-24" @default.
- W1580459230 creator A5007831147 @default.
- W1580459230 creator A5055970624 @default.
- W1580459230 date "1996-12-01" @default.
- W1580459230 modified "2023-09-26" @default.
- W1580459230 title "Metamorfismo de muy bajo grado en rocas volcánicas de la Formación Ventana, San Martín de los Andes, Neuquén, Argentina" @default.
- W1580459230 cites W1967419857 @default.
- W1580459230 cites W1993619314 @default.
- W1580459230 cites W1996381212 @default.
- W1580459230 cites W2008509380 @default.
- W1580459230 cites W2041371796 @default.
- W1580459230 cites W2064576463 @default.
- W1580459230 cites W2085244764 @default.
- W1580459230 cites W2143085622 @default.
- W1580459230 cites W2619465735 @default.
- W1580459230 cites W3149841401 @default.
- W1580459230 cites W617353587 @default.
- W1580459230 doi "https://doi.org/10.5027/andgeov23n2-a06" @default.
- W1580459230 hasPublicationYear "1996" @default.
- W1580459230 type Work @default.
- W1580459230 sameAs 1580459230 @default.
- W1580459230 citedByCount "4" @default.
- W1580459230 crossrefType "journal-article" @default.
- W1580459230 hasAuthorship W1580459230A5007831147 @default.
- W1580459230 hasAuthorship W1580459230A5055970624 @default.
- W1580459230 hasConcept C112764850 @default.
- W1580459230 hasConcept C127313418 @default.
- W1580459230 hasConcept C142362112 @default.
- W1580459230 hasConcept C15708023 @default.
- W1580459230 hasConcept C17409809 @default.
- W1580459230 hasConceptScore W1580459230C112764850 @default.
- W1580459230 hasConceptScore W1580459230C127313418 @default.
- W1580459230 hasConceptScore W1580459230C142362112 @default.
- W1580459230 hasConceptScore W1580459230C15708023 @default.
- W1580459230 hasConceptScore W1580459230C17409809 @default.
- W1580459230 hasIssue "2" @default.
- W1580459230 hasLocation W15804592301 @default.
- W1580459230 hasOpenAccess W1580459230 @default.
- W1580459230 hasPrimaryLocation W15804592301 @default.
- W1580459230 hasVolume "23" @default.
- W1580459230 isParatext "false" @default.
- W1580459230 isRetracted "false" @default.
- W1580459230 magId "1580459230" @default.
- W1580459230 workType "article" @default.