********************************************************************* Lothar Viereck-Götte <lothar.viereck-goette@xxxxxxxxxxx> ********************************************************************* Dear all, the deadline for submission of abstracts to IGC 33 (www.33igc.org) has been extended to Friday 7th March, so you still have the option to submit an abstract to: Session MPI-05 Large Igneous Provinces: Initiation, evolution and origin Conveners: Lothar Viereck-Goette, Jena, Germany lothar.viereck-goette@xxxxxxxxxxx Sverre Planke, Oslo, Norway planke@xxxxxxx Description: The events during initiation of some mafic Large Igneous Provinces (North Atlantic, Ferrar, and Karoo Igneous Province) were studied recently, with spectacular results and new (?) concepts. In all cases we see that early emplacement occurred as sills into sedimentary basins with abundant magma-wet sediment interaction and formation of vent complexes. We can neither identify a precursor phase of small volume magma emplacement, nor a regular early involvement of molten continental crust. In the Ferrar Province, we recognize that the magmas belong to the tholeiitic differentiation series with the early intrusive andesitic magmas being more evolved than the later plateau forming basaltic andesitic lavas. Which of these observations are of general relevance for mafic LIP formation and are crucial pieces in the big puzzle ? Is the formation of shallow sedimentary basins always a precursor stage of mafic continental LIPs ? How are silicic Large Igneous Provinces initiated, do they start with a mafic initial phase ? We invite all colleagues working on the topic of initiation of mafic or silicic LIP to present their new data from other LIPs in order to gain a more precise understanding of the early processes during production, evolution and emplacement of such catastrophic volumes of magma. We also invite you to whom it is of greater relevance that the interlayering of sediments and lava flows / pillows / hyaloclastites in the lower part of the effusive pile could be of economical interest (oil in sandstones). ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
