DOI: 10.1007/s00531-013-0963-8
Scopus记录号: 2-s2.0-84893522921
论文题名: Long-term fluid circulation in extensional faults in the central Catalan Coastal Ranges: P-T constraints from neoformed chlorite and K-white mica
作者: Cantarero I. ; Lanari P. ; Vidal O. ; Alías G. ; Travé A. ; Baqués V.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 1 起始页码: 165
结束页码: 188
语种: 英语
英文关键词: Catalan Coastal Ranges
; Chlorite-mica multi-equilibrium
; Fault rocks
; Hydrothermalism
; Low-P-low-T estimates
Scopus关键词: chlorite
; crystallization
; extensional tectonics
; geothermal gradient
; Mesozoic
; mica
; microcline
; muscovite
; P-T conditions
; rift zone
; rifting
; structural geology
; tectonic evolution
; tectonic setting
; Catalonia
; Catalonian Coastal Ranges
; Spain
英文摘要: The neoformation of chlorite and K-white mica in fault rocks from two main faults of the central Catalan Coastal Ranges, the Vallès and the Hospital faults, has allowed us to constrain the P-T conditions during fault evolution using thermodynamic modeling. Crystallization of M1 and M2 muscovite and microcline occured as result of deuteric alteration during the exhumation of the pluton (290 °C > T > 370 °C) in the Permian. After that, three tectonic events have been distinguished. The first tectonic event, attributed to the Mesozoic rifting, is characterized by precipitation of M3 and M4 phengite together with chlorite and calcite C1 at temperatures between 190 and 310 °C. The second tectonic event attributed to the Paleogene compression has only been identified in the Hospital fault with precipitation of low-temperature calcite C2. The shortcut produced during inversion of the Vallès fault was probably the responsible for the lack of neoformed minerals within this fault. Finally, the third tectonic event, which is related to the Neogene extension, is characterized in the Vallès fault by a new generation of chlorite, associated with calcite C4 and laumontite, formed at temperatures between 125 and 190 °C in the absence of K-white mica. Differently, the Hospital fault is characterized by the precipitation of calcite C3 during the syn-rift stage at temperatures around 150 °C and by low-temperature fluids precipitating calcites C5, C6 and PC1 during the post-rift stage. During the two extensional events (Mesozoic and Neogene), faults acted as conduits for hot fluids producing anomalous high geothermal gradients (50 °C/km minimum). © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893522921&doi=10.1007%2fs00531-013-0963-8&partnerID=40&md5=ba04956e00337e03a784e714248f398b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70373
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: Departament de Geoquímica, Petrologia i Prospecció Geològica, Universitat de Barcelona (UB), Martí i Franqués s/n, 08028 Barcelona, Spain; Institute of Geology, University of Bern, Baltzestrasse 1 3, Bern, CH-3012, Switzerland; ISTerre, Université de Grenoble I, CNRS, 1381 Rue de la Piscine, 38041 Grenoble, France
Recommended Citation:
Cantarero I.,Lanari P.,Vidal O.,et al. Long-term fluid circulation in extensional faults in the central Catalan Coastal Ranges: P-T constraints from neoformed chlorite and K-white mica[J]. International Journal of Earth Sciences,2014-01-01,103(1)