Matches in SemOpenAlex for { <https://semopenalex.org/work/W2031166475> ?p ?o ?g. }
Showing items 1 to 85 of
85
with 100 items per page.
- W2031166475 endingPage "177" @default.
- W2031166475 startingPage "167" @default.
- W2031166475 abstract "K-Ar and 40Ar/39Ar dating of volcanic rocks from the Maricunga belt of north-central Chile indicate that igneous activity took place throughout most of Miocene time at various places in the 150 by 30 km belt. No migration patterns of volcanism appear in the Miocene rocks of the belt. Volcanic activity ceased by the end of the Miocene. All the Miocene volcanic rocks studied are calcic andesites to dacites with about 62% SiO2, 18% A12O3, 4% Fe2O3 (total), and 2% K2O. Initial 87Sr/86Sr (Sri) values fall into two groups, one of lower values around 0.7050 to the west and the other of higher values around 0.7060 to the east. It is postulated that the two Sri groups reflect two adjoining coherent lower-crustal magma sources of possibly different age and subtly different composition that form part of the western edge of the South American craton. Dataciones radiométricas K-Ar y 40Ar/39Ar realizadas en vocas volcánicas libres de alteración en la faja de Maricunga (150 × 30 km), Cordillera norte-central Chile, indican que la actividad ignea ocurrió durante todo el Mioceno. A pesar de que la actividad volcánica cesó a fines del Mioceno y emigró hacia el este, en la franja no se aprecian tendencias de dirección y migración. Todas las rocas volcánicas estudiadas son andesitas y dacitas calcic con alradedor de 60% SiO2, 18% A12O3, 4% de Fe2O3 (total), y 2% K2O. Los valores iniciales de 87Sr/86Sr (Sri) se dividen en dos grupos; uno alrededor de 0.7060, y el otro alrededor de 0.7050, que corresponden al grupo occidental (bajo Sri) y al grupo oriental (alto Sri). Se postula que los grupos reflejan dos fuentes coherentes de magma de corteza inferior posiblemente de diferente edad y ingeniosamente de diferente composición forman parte del borde occidental del cratón sudamericano." @default.
- W2031166475 created "2016-06-24" @default.
- W2031166475 creator A5025206992 @default.
- W2031166475 creator A5033320937 @default.
- W2031166475 creator A5064941759 @default.
- W2031166475 creator A5069226521 @default.
- W2031166475 creator A5080978349 @default.
- W2031166475 date "1994-04-01" @default.
- W2031166475 modified "2023-09-27" @default.
- W2031166475 title "Age and Sr isotopic composition of volcanic rocks in the Maricunga Belt, Chile: implications for magma sources" @default.
- W2031166475 cites W1994413331 @default.
- W2031166475 cites W2018793997 @default.
- W2031166475 cites W2023320566 @default.
- W2031166475 cites W2035558641 @default.
- W2031166475 cites W2052205130 @default.
- W2031166475 cites W2067257157 @default.
- W2031166475 cites W2072500053 @default.
- W2031166475 cites W2089057318 @default.
- W2031166475 cites W2098776744 @default.
- W2031166475 cites W2108377869 @default.
- W2031166475 cites W2143436979 @default.
- W2031166475 cites W2154603570 @default.
- W2031166475 cites W2321208578 @default.
- W2031166475 cites W2479351267 @default.
- W2031166475 doi "https://doi.org/10.1016/0895-9811(94)90006-x" @default.
- W2031166475 hasPublicationYear "1994" @default.
- W2031166475 type Work @default.
- W2031166475 sameAs 2031166475 @default.
- W2031166475 citedByCount "19" @default.
- W2031166475 countsByYear W20311664752012 @default.
- W2031166475 countsByYear W20311664752013 @default.
- W2031166475 countsByYear W20311664752014 @default.
- W2031166475 countsByYear W20311664752019 @default.
- W2031166475 countsByYear W20311664752022 @default.
- W2031166475 crossrefType "journal-article" @default.
- W2031166475 hasAuthorship W2031166475A5025206992 @default.
- W2031166475 hasAuthorship W2031166475A5033320937 @default.
- W2031166475 hasAuthorship W2031166475A5064941759 @default.
- W2031166475 hasAuthorship W2031166475A5069226521 @default.
- W2031166475 hasAuthorship W2031166475A5080978349 @default.
- W2031166475 hasConcept C120806208 @default.
- W2031166475 hasConcept C127313418 @default.
- W2031166475 hasConcept C147717901 @default.
- W2031166475 hasConcept C151730666 @default.
- W2031166475 hasConcept C17409809 @default.
- W2031166475 hasConcept C183222429 @default.
- W2031166475 hasConcept C192241223 @default.
- W2031166475 hasConcept C2779321686 @default.
- W2031166475 hasConcept C36986328 @default.
- W2031166475 hasConcept C42787717 @default.
- W2031166475 hasConcept C6363049 @default.
- W2031166475 hasConcept C77928131 @default.
- W2031166475 hasConceptScore W2031166475C120806208 @default.
- W2031166475 hasConceptScore W2031166475C127313418 @default.
- W2031166475 hasConceptScore W2031166475C147717901 @default.
- W2031166475 hasConceptScore W2031166475C151730666 @default.
- W2031166475 hasConceptScore W2031166475C17409809 @default.
- W2031166475 hasConceptScore W2031166475C183222429 @default.
- W2031166475 hasConceptScore W2031166475C192241223 @default.
- W2031166475 hasConceptScore W2031166475C2779321686 @default.
- W2031166475 hasConceptScore W2031166475C36986328 @default.
- W2031166475 hasConceptScore W2031166475C42787717 @default.
- W2031166475 hasConceptScore W2031166475C6363049 @default.
- W2031166475 hasConceptScore W2031166475C77928131 @default.
- W2031166475 hasIssue "2" @default.
- W2031166475 hasLocation W20311664751 @default.
- W2031166475 hasOpenAccess W2031166475 @default.
- W2031166475 hasPrimaryLocation W20311664751 @default.
- W2031166475 hasRelatedWork W2006824932 @default.
- W2031166475 hasRelatedWork W2031166475 @default.
- W2031166475 hasRelatedWork W2045579966 @default.
- W2031166475 hasRelatedWork W2087616905 @default.
- W2031166475 hasRelatedWork W2143103861 @default.
- W2031166475 hasRelatedWork W2317736492 @default.
- W2031166475 hasRelatedWork W2386616448 @default.
- W2031166475 hasRelatedWork W2493384121 @default.
- W2031166475 hasRelatedWork W2902790696 @default.
- W2031166475 hasRelatedWork W3138171758 @default.
- W2031166475 hasVolume "7" @default.
- W2031166475 isParatext "false" @default.
- W2031166475 isRetracted "false" @default.
- W2031166475 magId "2031166475" @default.
- W2031166475 workType "article" @default.