DOI: 10.1007/s00531-012-0836-6
论文题名: Origin of deformed halite hopper crystals, pseudomorphic anhydrite cubes and polyhalite in Alpine evaporites (Austria, Germany)
作者: Leitner C. ; Neubauer F. ; Marschallinger R. ; Genser J. ; Bernroider M.
刊名: International Journal of Earth Sciences
出版年: 2013
卷: 102, 期: 3 起始页码: 813
结束页码: 829
语种: 英语
英文关键词: Alps
; Ar-Ar dating
; Evaporites
; Halite
; Polyhalite
Scopus关键词: anhydrite
; argon-argon dating
; crystal structure
; deformation
; evaporite
; halite
; mudstone
; Permian-Triassic boundary
; rift zone
; sedimentation
; Alps
; Austria
; Germany
英文摘要: The Alpine Haselgebirge Formation represents an Upper Permian to Lower Triassic evaporitic rift succession of the Northern Calcareous Alps (Eastern Alps). Although the rocksalt body deposits are highly tectonised, consisting mainly of protocataclasites and mylonites of halite and mudrock, the early diagenetic history can be established from non-tectonised mudrock bodies: Cm-sized euhedral halite hopper crystals formed as displacive cubes within mud just during shallow burial. The crystals were deformed by subsequent compaction. Later, migrating fluids led to the replacement of halite by anhydrite retaining the shapes of deformed halite cubes. Polyhalite formed from subsequent enhanced fluid migration. Mudrock provided water by dewatering, while potassium and magnesium were dissolved from primary salt minerals. When these fluids interacted with sulphates, polyhalite precipitated. 40Ar/39Ar analyses date the polyhalite from within the retaining shapes of deformed halite hopper-shaped cubes from two localities to ca. 235-232 Ma (Middle Triassic). At this time, ca. 20-25 Ma after sedimentation, polyhalite crystallised at shallow levels. © 2012 The Author(s). URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875384173&doi=10.1007%2fs00531-012-0836-6&partnerID=40&md5=1c15e8857ebeee1672b17cc6be5f7ec2
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70584
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: Fachbereich für Geographie und Geologie, Universität Salzburg, Hellbrunnerstraße 34, 5020 Salzburg, Austria; Institut für Geographic Information Science, Österreichische Akademie der Wissenschaften, Schillerstrasse 30, 5020 Salzburg, Austria
Recommended Citation:
Leitner C.,Neubauer F.,Marschallinger R.,et al. Origin of deformed halite hopper crystals, pseudomorphic anhydrite cubes and polyhalite in Alpine evaporites (Austria, Germany)[J]. International Journal of Earth Sciences,2013-01-01,102(3)