Matches in SemOpenAlex for { <https://semopenalex.org/work/W2618146351> ?p ?o ?g. }
- W2618146351 abstract "Megacrystic sapphires are frequently associated with alkaline basalts, most notably in Asia and Australia, although basalt is not generally normative in corundum. Most of these sapphire occurrences are located in alluvial or eluvial deposits, making it difficult to study the enigmatic relationship between the sapphires and their host rocks. Here, we present detailed petrological and geochemical investigations of in situ megacrystic sapphires within alkaline basalts from the Cenozoic Siebengebirge Volcanic Field (SVF) in Germany. Markedly, the sapphires show several micrometer thick spinel coronas at the contact with the host basalt, indicating chemical disequilibrium between the sapphire and the basaltic melt, supporting a xenogenetic relationship. However, in situ U–Pb dating of a Columbite Group inclusion within one Siebengebirge sapphire using laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) indicates a close genetic relationship between sapphire crystallization and alkaline mafic volcanism in the SVF. The syngenetic mineral inclusion suite including carbonates, members of the Pyrochlore, Betafite and Columbite Groupe minerals, as well as a high abundance of HFSE and of gaseous low-density CO2 inclusions support a parentage of a highly evolved, MgO and FeO deficient carbonatitic melt. We identified CO2 to be the link between alkaline basaltic volcanism and the xenocrystic sapphires. Only alkaline volcanic suites can build up enough CO2 in this magma chamber upon fractionation so that at high degrees of fractionation a carbonatitic melt exsolves which in turn can crystallize sapphires." @default.
- W2618146351 created "2017-06-05" @default.
- W2618146351 creator A5006627575 @default.
- W2618146351 creator A5020609698 @default.
- W2618146351 creator A5028630953 @default.
- W2618146351 creator A5030081327 @default.
- W2618146351 creator A5031933983 @default.
- W2618146351 creator A5037054243 @default.
- W2618146351 creator A5083889522 @default.
- W2618146351 creator A5091454535 @default.
- W2618146351 date "2017-05-23" @default.
- W2618146351 modified "2023-09-27" @default.
- W2618146351 title "Petrogenesis of alkaline basalt-hosted sapphire megacrysts. Petrological and geochemical investigations of in situ sapphire occurrences from the Siebengebirge Volcanic Field, Germany" @default.
- W2618146351 cites W1662762401 @default.
- W2618146351 cites W1964465140 @default.
- W2618146351 cites W1965110918 @default.
- W2618146351 cites W1968383788 @default.
- W2618146351 cites W1968418663 @default.
- W2618146351 cites W1972875957 @default.
- W2618146351 cites W1977650828 @default.
- W2618146351 cites W1978533014 @default.
- W2618146351 cites W1978771740 @default.
- W2618146351 cites W1983248190 @default.
- W2618146351 cites W1983717932 @default.
- W2618146351 cites W1989978545 @default.
- W2618146351 cites W1991595292 @default.
- W2618146351 cites W1996080599 @default.
- W2618146351 cites W1999373964 @default.
- W2618146351 cites W2000950886 @default.
- W2618146351 cites W2001426515 @default.
- W2618146351 cites W2001869050 @default.
- W2618146351 cites W2004304960 @default.
- W2618146351 cites W2005195754 @default.
- W2618146351 cites W2006855425 @default.
- W2618146351 cites W2007105153 @default.
- W2618146351 cites W2008875313 @default.
- W2618146351 cites W2009227467 @default.
- W2618146351 cites W2011360320 @default.
- W2618146351 cites W2012933447 @default.
- W2618146351 cites W2015361267 @default.
- W2618146351 cites W2016756950 @default.
- W2618146351 cites W2016904546 @default.
- W2618146351 cites W2017299709 @default.
- W2618146351 cites W2020973699 @default.
- W2618146351 cites W2023415915 @default.
- W2618146351 cites W2026862001 @default.
- W2618146351 cites W2027124220 @default.
- W2618146351 cites W2029011462 @default.
- W2618146351 cites W2029013584 @default.
- W2618146351 cites W2029211105 @default.
- W2618146351 cites W2031400338 @default.
- W2618146351 cites W2034207475 @default.
- W2618146351 cites W2037616576 @default.
- W2618146351 cites W2039797272 @default.
- W2618146351 cites W2041514173 @default.
- W2618146351 cites W2041627403 @default.
- W2618146351 cites W2043004112 @default.
- W2618146351 cites W2043466950 @default.
- W2618146351 cites W2043868825 @default.
- W2618146351 cites W2053014251 @default.
- W2618146351 cites W2058660077 @default.
- W2618146351 cites W2059356468 @default.
- W2618146351 cites W2059838702 @default.
- W2618146351 cites W2063080801 @default.
- W2618146351 cites W2066357442 @default.
- W2618146351 cites W2066548489 @default.
- W2618146351 cites W2066997802 @default.
- W2618146351 cites W2070360508 @default.
- W2618146351 cites W2073159006 @default.
- W2618146351 cites W2078236626 @default.
- W2618146351 cites W2081888905 @default.
- W2618146351 cites W2085064498 @default.
- W2618146351 cites W2088240363 @default.
- W2618146351 cites W2089783854 @default.
- W2618146351 cites W2094309826 @default.
- W2618146351 cites W2095199328 @default.
- W2618146351 cites W2098360149 @default.
- W2618146351 cites W2100411277 @default.
- W2618146351 cites W2101254437 @default.
- W2618146351 cites W2104453960 @default.
- W2618146351 cites W2109054209 @default.
- W2618146351 cites W2109772946 @default.
- W2618146351 cites W2116892955 @default.
- W2618146351 cites W2117289252 @default.
- W2618146351 cites W2120561922 @default.
- W2618146351 cites W2141802516 @default.
- W2618146351 cites W2143308701 @default.
- W2618146351 cites W2158043264 @default.
- W2618146351 cites W2164936193 @default.
- W2618146351 cites W2167782460 @default.
- W2618146351 cites W2315955109 @default.
- W2618146351 cites W2316331563 @default.
- W2618146351 cites W2317672672 @default.
- W2618146351 cites W2321314106 @default.
- W2618146351 cites W2321457144 @default.
- W2618146351 cites W2326789469 @default.
- W2618146351 cites W2328057613 @default.
- W2618146351 cites W2328558817 @default.
- W2618146351 cites W2334729014 @default.
- W2618146351 cites W2335827078 @default.