DOI: 10.1007/s00531-014-1046-1
论文题名: Hydrothermal alteration and zeolitization of the Fohberg phonolite, Kaiserstuhl Volcanic Complex, Germany
作者: Weisenberger T.B. ; Spürgin S. ; Lahaye Y.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 8 起始页码: 2273
结束页码: 2300
语种: 英语
英文关键词: Götzenite
; Hydrothermal alteration
; Kaiserstuhl Volcanic Complex
; Pectolite
; Sepiolite
; Zeolite
Scopus关键词: hydrothermal alteration
; meteoric water
; mineralogy
; organic matter
; phonolite
; physicochemical property
; sepiolite
; zeolite
; Baden-Wurttemberg
; Germany
; Kaiserstuhl
英文摘要: The subvolcanic Fohberg phonolite (Kaiserstuhl Volcanic Complex, Germany) is an economic zeolite deposit, formed by hydrothermal alteration of primary magmatic minerals. It is mined due to the high (>40 wt%) zeolite content, which accounts for the remarkable zeolitic physicochemical properties of the ground rock. New mineralogical and geochemical studies are carried out (a) to evaluate the manifestation of hydrothermal alteration, and (b) to constrain the physical and chemical properties of the fluids, which promoted hydrothermal replacement. The alkaline intrusion is characterized by the primary mineralogy: feldspathoid minerals, K-feldspar, aegirine–augite, wollastonite, and andradite. The rare-earth elements-phase götzenite is formed during the late-stage magmatic crystallization. Fluid-induced re-equilibration of feldspathoid minerals and wollastonite caused breakdown to a set of secondary phases. Feldspathoid minerals are totally replaced by various zeolite species, calcite, and barite. Wollastonite breakdown results in the formation of various zeolites, calcite, pectolite, sepiolite, and quartz. Zeolites are formed during subsolidus hydrothermal alteration (<150 °C) under alkaline conditions. A sequence of Ca–Na-dominated zeolite species (gonnardite, thomsonite, mesolite) is followed by natrolite. The sequence reflects an increase in (Formula presented.) and decrease in (Formula presented.) of the precipitating fluid. Low radiogenic 87Sr/86Sr values indicate a local origin of the elements necessary for secondary mineral formation from primary igneous phases. In addition, fractures cut the intrusive body, which contain zeolites, followed by calcite and a variety of other silicates, carbonates, and sulfates as younger generations. Stable isotope analysis of late-fracture calcite indicates very late circulation of meteoric fluids and mobilization of organic matter from surrounding sedimentary units. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957958802&doi=10.1007%2fs00531-014-1046-1&partnerID=40&md5=a2f8c46f002dc2340c151703b46095d3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70319
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 Geosciences, University of Oulu, P.O. Box 3000, Oulu, Finland; Hans G. Hauri Mineralstoffwerke, Bötzingen, Germany; Geological Survey of Finland, Espoo, Finland
Recommended Citation:
Weisenberger T.B.,Spürgin S.,Lahaye Y.. Hydrothermal alteration and zeolitization of the Fohberg phonolite, Kaiserstuhl Volcanic Complex, Germany[J]. International Journal of Earth Sciences,2014-01-01,103(8)