DOI: 10.1007/s00531-016-1296-1
Scopus记录号: 2-s2.0-84955244712
论文题名: Durbachites from the Eastern Moldanubicum (Bohemian Massif): erosional relics of large, flat tabular intrusions of ultrapotassic melts—geophysical and petrological record
作者: Leichmann J. ; Gnojek I. ; Novák M. ; Sedlák J. ; Houzar S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 1 起始页码: 59
结束页码: 77
语种: 英语
英文关键词: Geological setting
; Radiometric, magnetic and gravity survey results
; Třebíč and Jihlava ultrapotassic plutons
Scopus关键词: airborne survey
; erosion
; geophysical survey
; petrology
; pluton
; syenite
; Bohemian Massif
; Czech Republic
; Jihlava
; Trebic Massif
; Vysocina
英文摘要:
The results of the airborne survey comprising gamma-ray spectrometry and proton magnetometry, ground gravity survey, and field geological observations (e.g., deep borehole profiles, contact aureole in dolomite marbles, distribution of granitic pegmatites within the Třebíč pluton) suggest that the ultrapotassic Třebíč and Jihlava plutons are flat intrusions. They intruded distinct deep levels of the crust, 2–4 kbar for Třebíč pluton, and 5–7 kbar for Jihlava-pluton. Current thickness of the intrusions is generally less than 2 km, with two exceptions: (1) central part of the Jihlava pluton and (2) a small body near Věžnice, where the estimated depth of tube-shaped stocks of shoshonitic and ultrapotassic gabbros or monzogabbros is around 2.5 km. These stocks could represent feeding pipes of basic and alkaline and dry magmas protruding to the upper crust level. The NE part of the Třebíč pluton is a bottom part of this body, whereas the NW corner and the southern promontory of the pluton could represent an upper (roof) part of the intrusion. Small isolated durbachite bodies located within the Moldanubian gneisses and migmatites of the Strážek Unit represent rootless remnants of a former large and flat durbachite body initially extending significantly more to N and NE and eroded since Lower Carboniferous. Discrepancy between the long-wave magnetic and gravity anomalies, and surface geological structure of the eastern part of the Moldanubian Zone indicates a crucial role of the thrust tectonics. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955244712&doi=10.1007%2fs00531-016-1296-1&partnerID=40&md5=7c3dd37d3d6de6759539ad14cdde2c5e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70094
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 Geological Sciences, Masaryk University, Kotlářská 2, Brno, Czech Republic; Miligal, s.r.o., Axmanova 531/13, Brno, Czech Republic; Department of Mineralogy and Petrography, Moravian Museum, Zelný trh 2, Brno, Czech Republic
Recommended Citation:
Leichmann J.,Gnojek I.,Novák M.,et al. Durbachites from the Eastern Moldanubicum (Bohemian Massif): erosional relics of large, flat tabular intrusions of ultrapotassic melts—geophysical and petrological record[J]. International Journal of Earth Sciences,2017-01-01,106(1)