caa a22 4500 477062628 CHVBK 20180405111405.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/s004450050144 doi (NATIONALLICENCE)springer-10.1007/s004450050144 The 1669 eruption at Mount Etna: chronology, petrology and geochemistry, with inferences on the magma sources and ascent mechanisms [Elektronische Daten] [Rosa Anna Corsaro, Renato Cristofolini, Loredana Patanè]  Analysis of the petrochemical characters of the 1669 Etnean lavas shows that they can be grouped into two sets: SET1 lavas were erupted from 11 to 20 March and are more primitive in composition than SET2, erupted later until the end of activity. Both sets may be interpreted as the result of crystallization under different conditions of two primary magmas which are compositionally slightly distinct and which fractionate different volumetric proportions of minerals. To explain why more mafic lavas (SET1) were erupted earlier than more acid ones (SET2), we argue that new deeper magma rose up into a reservoir where residing magma was fractionating. Density calculations demonstrate that new magma is less dense and may originate a plume, rapidly rising through the residing magma which is cooler and more volatile-depleted than the new magma. Calculations of uprise velocity assuming laminar flow are consistent with this hypothesis. Springer-Verlag Berlin Heidelberg, 1996 Key words Lava compositions nationallicence Magma sources nationallicence Plume ascent nationallicence Mount Etna nationallicence 1669 eruption nationallicence Corsaro Rosa Anna Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut Cristofolini Renato Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut Patanè Loredana Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut https://doi.org/10.1007/s004450050144 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050144 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Corsaro Rosa Anna Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut NATIONALLICENCE 700 1- Cristofolini Renato Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut NATIONALLICENCE 700 1- Patanè Loredana Istituto di Scienze della Terra, University of Catania, C.so Italia, 55, I-95129 Catania, Italy Fax: +95 719 5760, IT aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer