DOI: 10.1007/s00531-016-1363-7
Scopus记录号: 2-s2.0-84978033976
论文题名: Interaction between two contrasting magmas in the Albtal pluton (Schwarzwald, SW Germany): textural and mineral-chemical evidence
作者: Michel L. ; Wenzel T. ; Markl G.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 5 起始页码: 1505
结束页码: 1524
语种: 英语
英文关键词: Granite
; Mafic enclave
; Magma chamber processes
; Magma mixing
; Plagioclase
; Schwarzwald
Scopus关键词: chemical composition
; enclave
; granite
; mafic rock
; magma chamber
; mixing
; plagioclase
; pluton
; texture
; Baden-Wurttemberg
; Black Forest
; Germany
英文摘要:
The magmatic evolution of the Variscan Albtal pluton, Schwarzwald, SW Germany, is explored using detailed textural observations and the chemical composition of plagioclase and biotite in both granite and its mafic magmatic enclaves (MMEs). MMEs probably formed in a two-step process. First, mafic magma intruded a granitic magma chamber and created a boundary layer, which received thermal and compositional input from the mafic magma. This is indicated by corroded “granitic” quartz crystals and by large “granitic” plagioclase xenocrysts, which contain zones of higher anorthite and partly crystallized from a melt of higher Sr content. Texturally, different plagioclase types (e.g. zoned and inclusion-rich types) correspond to different degrees of overprint most likely caused by a thermal and compositional gradient in the boundary layer. The intrusion of a second mafic magma batch into the boundary layer is recorded by a thin An50 zone along plagioclase rims that crystallized from a melt enriched in Sr. Most probably, the second mafic intrusion caused disruption of the boundary layer, dispersal of the hybrid magma in the granite magma and formation of the enclaves. Rapid thermal quenching of the MMEs in the granite magma is manifested by An30 overgrowths on large plagioclase grains that contain needle apatites. Our results demonstrate the importance of microtextural investigations for the reconstruction of possible mixing end members in the formation of granites. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978033976&doi=10.1007%2fs00531-016-1363-7&partnerID=40&md5=f2489c0b4b97dbfd54773c8f6796a518
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70015
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 Tübingen, Wilhelmstrasse 56, Tübingen, Germany
Recommended Citation:
Michel L.,Wenzel T.,Markl G.. Interaction between two contrasting magmas in the Albtal pluton (Schwarzwald, SW Germany): textural and mineral-chemical evidence[J]. International Journal of Earth Sciences,2017-01-01,106(5)