DOI: 10.1007/s00531-013-0899-z
Scopus记录号: 2-s2.0-84881610459
论文题名: Long-distance lava correlation in the Paraná volcanic province along the Serra Geral cuesta, southeastern Brazil
作者: Hartmann L.A. ; Arena K.R. ; Duarte S.K. ; Pertille J.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2013
卷: 102, 期: 6 起始页码: 1655
结束页码: 1669
语种: 英语
英文关键词: Gamma-spectrometry
; Geochemistry
; Lava correlation
; Lava stratigraphy
; Paraná volcanic province
; Serra Geral cuesta
Scopus关键词: andesite
; chemical composition
; dacite
; igneous geochemistry
; lava flow
; lithostratigraphy
; pahoehoe
; rhyolite
; sequence stratigraphy
; volcanology
; Brazil
; Parana [Brazil]
英文摘要: The capability of determining the flow-by-flow stratigraphy and the long-distance correlation of lava flows in large continental volcanic provinces leads to a considerable advance in the understanding of processes related to generation and evolution of the lavas. The Paraná volcanic province is exposed along the Serra Geral cuesta of southern Brazil in a steeply inclined, 1,000-m-high section starting 40-m above sea level. Each of the 10-20 pahoehoe flows and rhyodacite flow units has a unique chemical composition. Integrated with field stratigraphy and gamma-spectrometric measurements, this leads to the establishment of the correct stratigraphic sequence in each of three different vertical sections. The number of flows integrating the three serras is 26 ("serra" is a mountain range in Portuguese). Each serra has basaltic andesites at the base, whereas rhyodacites are intercalated with basaltic andesites at the top. Three basaltic andesite flows and one rhyodacite flow unit are correlated between Serra Umbu and Serra Boa Vista (10 km). In the Serra Faxinal, a thick (170 m) sill at the base correlates with flow 13F, whereas a dike-sill in the Graxaim quarry (24 km distance) correlates with flow 3F. One basaltic andesite and two rhyodacite flow units correlate between Serra Faxinal and Serra Umbu (50 km). The results are most significant for the understanding of large tracts of continental volcanic provinces with use of common geochemical and gamma-spectrometric techniques. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881610459&doi=10.1007%2fs00531-013-0899-z&partnerID=40&md5=cabdd306802dda851fde161ec11ee997
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70529
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
Recommended Citation:
Hartmann L.A.,Arena K.R.,Duarte S.K.,et al. Long-distance lava correlation in the Paraná volcanic province along the Serra Geral cuesta, southeastern Brazil[J]. International Journal of Earth Sciences,2013-01-01,102(6)