DOI: 10.1007/s00531-014-1006-9
Scopus记录号: 2-s2.0-84908574029
论文题名: Volatile (sulphur and chlorine), major, and trace element geochemistry of mafic to intermediate tephras from the Chilean Southern Volcanic Zone (33–43°S)
作者: Wehrmann H. ; Hoernle K. ; Jacques G. ; Garbe-Schönberg D. ; Schumann K. ; Mahlke J. ; Lara L.E.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 7 起始页码: 1945
结束页码: 1962
语种: 英语
英文关键词: Chilean Southern Volcanic Zone
; Chlorine
; Melt inclusions
; Subduction zone
; Sulphur
Scopus关键词: chlorine
; fractionation
; Holocene
; igneous geochemistry
; melt inclusion
; subduction zone
; sulfur
; tephra
; trace element
; Chile
; Southern Volcanic Zone
英文摘要: Here we present the first systematic investigation of volatile geochemistry along the Southern Volcanic Zone (SVZ) of Chile. Holocene olivine-hosted melt inclusions in the most mafic tephras sampled from 16 volcanoes along the volcanic front of the SVZ between 33°S and 43°S were analysed for pre-eruptive sulphur, chlorine, and major element contents. These results are combined with trace element compositions of the host whole rocks. The highest fractionation-corrected gas contents occur in the least-degassed melt inclusions from small monogenetic cones of Los Hornitos, Cabeza de Vaca, and Apagado from both the transitional and the southern-central SVZ, reaching ~3,000 μg/g S and 1,400 μg/g Cl, while the lowest abundances of ~1,100 μg/g S and ~600 μg/g Cl were found in the central SVZ at Volcán Lonquimay, Volcán Llaima, and Volcán Villarrica. Chlorine co-varies with trace element indicators for the degree of melting and/or source enrichment, such that the lowest Cl contents are found in high-degree melts from the most depleted mantle sources. The size of the volcanic edifices correlates inversely with Cl abundances in the melt. This could reflect more extensive degassing during ascent through the complex magma plumbing systems beneath the stratovolcanoes or greater dilution during larger degrees of melting of more depleted sources, or a combination of these factors. Compared to other subduction zones, the SVZ melt inclusions exhibit Cl and S abundances in the same range as most of those from the Central American and those from the Marianas arcs. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908574029&doi=10.1007%2fs00531-014-1006-9&partnerID=40&md5=a9b81ed9647925e6eeb37efc64d82fe6
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70337
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: SFB 574, GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstr. 1-3, Kiel, Germany; SFB 574, Institute of Geosciences, Christian-Albrechts-University of Kiel, Ludewig-Meyn-Str. 10, Kiel, Germany; Sernageomín (Servicio Nacional de Geología y Minería), Av. Santa María 0104, Santiago, Chile
Recommended Citation:
Wehrmann H.,Hoernle K.,Jacques G.,et al. Volatile (sulphur and chlorine), major, and trace element geochemistry of mafic to intermediate tephras from the Chilean Southern Volcanic Zone (33–43°S)[J]. International Journal of Earth Sciences,2014-01-01,103(7)