Burchardt, Leonore

[["dc.bibliographiccitation.artnumber","85"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Bulletin of Volcanology"],["dc.bibliographiccitation.volume","78"],["dc.contributor.author","Berg, S. E."],["dc.contributor.author","Troll, Valentin R."],["dc.contributor.author","Deegan, F. M."],["dc.contributor.author","Burchardt, S."],["dc.contributor.author","Krumbholz, Michael"],["dc.contributor.author","Mancini, L."],["dc.contributor.author","Polacci, M."],["dc.contributor.author","Carracedo, J. C."],["dc.contributor.author","Soler, V."],["dc.contributor.author","Arzilli, F."],["dc.contributor.author","Brun, F."],["dc.date.accessioned","2018-11-07T10:04:42Z"],["dc.date.available","2018-11-07T10:04:42Z"],["dc.date.issued","2016"],["dc.description.abstract","During the first week of the 2011 El Hierro submarine eruption, abundant light-coloured pumiceous, high-silica volcanic bombs coated in dark basanite were found floating on the sea. The composition of the light-coloured frothy material ('xeno-pumice') is akin to that of sedimentary rocks from the region, but the textures resemble felsic magmatic pumice, leaving their exact mode of formation unclear. To help decipher their origin, we investigated representative El Hierro xeno-pumice samples using X-ray computed microtomography for their internal vesicle shapes, volumes, and bulk porosity, as well as for the spatial arrangement and size distributions of vesicles in three dimensions (3D). We find a wide range of vesicle morphologies, which are especially variable around small fragments of rock contained in the xeno-pumice samples. Notably, these rock fragments are almost exclusively of sedimentary origin, and we therefore interpret them as relicts an the original sedimentary ocean crust protolith(s). The irregular vesiculation textures observed probably resulted from pulsatory release of volatiles from multiple sources during xeno-pumice formation, most likely by successive release of pore water and mineral water during incremental heating and decompression of the sedimentary protoliths."],["dc.identifier.doi","10.1007/s00445-016-1080-x"],["dc.identifier.isi","000394130700001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14358"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38755"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-0819"],["dc.relation.issn","0258-8900"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Heterogeneous vesiculation of 2011 El Hierro xeno-pumice revealed by X-ray computed microtomography"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","401"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Solid Earth"],["dc.bibliographiccitation.lastpage","414"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Krumbholz, Michael"],["dc.contributor.author","Bock, M."],["dc.contributor.author","Burchardt, S."],["dc.contributor.author","Kelka, U."],["dc.contributor.author","Vollbrecht, Axel"],["dc.date.accessioned","2018-11-07T09:14:31Z"],["dc.date.available","2018-11-07T09:14:31Z"],["dc.date.issued","2012"],["dc.description.abstract","In recent years, the electromagnetic radiation (EMR) method has been used to detect faults and to determine main horizontal stress directions from variations in intensities and directional properties of electromagnetic emissions, which are assumed to be generated during micro-cracking. Based on a large data set taken from an area of about 250 000 km(2) in Northern Germany, Denmark, and southern Sweden with repeated measurements at one location during a time span of about 1.5 yr, the method was systematically tested. Reproducible observations of temporary changes in the signal patterns, as well as a strongly concentric spatial pattern of the main directions of the magnetic component of the EMR point to very low frequency (VLF) transmitters as the main source and hence raise serious concerns about the applicability of the method to determine recent crustal stresses. We conclude that the EMR method, at its current stage of development, does not allow determination of the main horizontal stress directions."],["dc.description.sponsorship","University of Gottingen"],["dc.identifier.doi","10.5194/se-3-401-2012"],["dc.identifier.isi","000321443000005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27435"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1869-9510"],["dc.title","A critical discussion of the electromagnetic radiation (EMR) method to determine stress orientations within the crust"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]