globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.06.013
Scopus记录号: 2-s2.0-85049553214
论文题名:
Crustal-scale fluid circulation and co-seismic shallow comb-veining along the longest normal fault of the central Apennines, Italy
作者: Smeraglia L.; Bernasconi S.M.; Berra F.; Billi A.; Boschi C.; Caracausi A.; Carminati E.; Castorina F.; Doglioni C.; Italiano F.; Rizzo A.L.; Uysal I.T.; Zhao J.-X.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 498
起始页码: 152
结束页码: 168
语种: 英语
英文关键词: calcite veins ; carbonate faults ; comb fractures ; fault–fluid interaction ; fluid inclusions ; seismicity
Scopus关键词: Calcite ; Earthquakes ; Groundwater ; Calcite precipitation ; Calcite veins ; Fluid inclusion ; Fluid interactions ; Precipitation depths ; seismicity ; Seismogenic structures ; Shallow groundwater ; Fault slips ; calcite ; carbonate ; circulation ; coseismic process ; crust ; fluid inclusion ; fluid-structure interaction ; fracture ; normal fault ; seismicity ; vein (geology) ; Apennines ; Italy
英文摘要: The extensional Val Roveto Fault, which is the longest exhumed potentially-seismogenic structure of central Apennines, Italy, is examined to constrain earthquake-related fluid circulation and fluid sources within shallow carbonate-hosted faults. The study focuses on fault-related comb and slip-parallel veins that are calcite-filled and cut through the principal surface of the Val Roveto Fault. We observe multiple crack-and-seal events characterized by several veining episodes, probably related to different slip increments along the fault plane. We show that vein calcite precipitated in Late Pleistocene time below the present-day outcrop level at a maximum depth of ∼350 m and temperatures between 32 and 64 °C from meteoric-derived fluids modified by reactions with crustal rocks and with a mantle contribution (up to ∼39%). The observed warm temperatures are not compatible with a shallow (≤∼350 m) precipitation depth, which, in this region, is dominated by circulation of cold meteoric water and/or shallow groundwater. Based on structural–geochemical data, we propose that deep-seated crust–mantle-derived warm fluids were squeezed upward during earthquakes and were hence responsible for calcite precipitation at shallow depths in co-seismic comb and slip-parallel fractures. As comb- and slip-parallel veins are rather common, particularly along seismogenic extensional faults, we suggest that further studies are necessary to test whether these veins are often of co-seismic origin. If so, they may become a unique and irreplaceable tool to unravel the seismic history of hazardous active faults. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109737
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Dipartimento di Scienze della Terra, Sapienza Università di Roma, P.le Aldo Moro 5, Roma, 00185, Italy; Geological Institute, ETH Zürich, Sonneggstrasse 5, Zürich, 8092, Switzerland; Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Mangiagalli 34, Milano, 20133, Italy; Consiglio Nazionale delle Ricerche, Dipartimento di Scienze della Terra, Sapienza Università di Roma, P.le Aldo Moro 5, Roma, 00185, Italy; Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Via Moruzzi 1, Pisa, 56124, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa 153, Palermo, 90146, Italy; Istituto Nazionale di Geofisica e Vulcanologia, sede di Roma, Via di Vigna Murata 605, Roma, 00143, Italy; CSIRO Energy, 26 Dick Perry Avenue, Kensington, WA 6151, Australia; Queensland Geothermal Energy Centre of Excellence, The University of Queensland, Queensland, 4072, Australia; Radiogenic Isotope Facility, School of Earth Sciences, The University of Queensland, Brisbane, Qld 4072, Australia

Recommended Citation:
Smeraglia L.,Bernasconi S.M.,Berra F.,et al. Crustal-scale fluid circulation and co-seismic shallow comb-veining along the longest normal fault of the central Apennines, Italy[J]. Earth and Planetary Science Letters,2018-01-01,498
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