DOI: 10.1007/s00531-014-1048-z
Scopus记录号: 2-s2.0-84928909954
论文题名: Are flood basalt eruptions monogenetic or polygenetic?
作者: Sheth H.C. ; Cañón-Tapia E.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 8 起始页码: 2147
结束页码: 2162
语种: 英语
英文关键词: Deccan Traps
; Flood basalt
; Hawaii
; Iceland
; Monogenetic
; Polygenetic
; Volcanism
Scopus关键词: Deccan Traps
; flood basalt
; igneous province
; shield volcano
; volcanic eruption
; volcanism
; volcanology
; Hawaii [United States]
; Iceland
; United States
英文摘要: A fundamental classification of volcanoes divides them into “monogenetic” and “polygenetic.” We discuss whether flood basalt fields, the largest volcanic provinces, are monogenetic or polygenetic. A polygenetic volcano, whether a shield volcano or a stratovolcano, erupts from the same dominant conduit for millions of years (excepting volumetrically small flank eruptions). A flood basalt province, built from different eruptive fissures dispersed over wide areas, can be considered a polygenetic volcano without any dominant vent. However, in the same characteristic, a flood basalt province resembles a monogenetic volcanic field, with only the difference that individual eruptions in the latter are much smaller. This leads to the question how a flood basalt province can be two very different phenomena at the same time. Individual flood basalt eruptions have previously been considered monogenetic, contrasted by only their high magma output (and lava fluidity) with typical “small-volume monogenetic” volcanoes. Field data from Hawaiian shield volcanoes, Iceland, and the Deccan Traps show that whereas many feeder dykes were single magma injections, and the eruptions can be considered “large monogenetic” eruptions, multiple dykes are equally abundant. They indicate that the same dyke fissure repeatedly transported separate magma batches, feeding an eruption which was thus polygenetic by even the restricted definition (the same magma conduit). This recognition helps in understanding the volcanological, stratigraphic, and geochemical complexity of flood basalts. The need for clear concepts and terminology is, however, strong. We give reasons for replacing “monogenetic volcanic fields” with “diffuse volcanic fields” and for dropping the term “polygenetic” and describing such volcanoes simply and specifically as “shield volcanoes,” “stratovolcanoes,” and “flood basalt fields.” © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928909954&doi=10.1007%2fs00531-014-1048-z&partnerID=40&md5=e0ca8ced44eaef1c489a947285bbf115
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70230
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: Department of Earth Sciences, Indian Institute of Technology Bombay (IITB), Powai, Mumbai, India; Earth Sciences Division, Centro de Investigación Cientifica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, Mexico
Recommended Citation:
Sheth H.C.,Cañón-Tapia E.. Are flood basalt eruptions monogenetic or polygenetic?[J]. International Journal of Earth Sciences,2015-01-01,104(8)