Assessing the past thermal and chemical history of fluids in crystalline rock by combining fluid inclusion and isotopic investigations of fracture calcite

Blyth, Alexander; Frape, Shaun K.; Blomqvist, R.; Nissinen, Pasi

doi:10.1016/s0883-2927(00)00007-x

Cited by 46 publications

(22 citation statements)

References 20 publications

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“…9B). This value suggests a fluid of basinal, metamorphic or magmatic origin (Taylor 1987;Blyth et al 2000), or a fluid exchanged with rock. Liquid aqueous inclusions imply crystallisation temperatures near or below 50°C (Goldstein & Reynolds 1994), which casts doubt upon a magmatic or metamorphic origin.…”

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confidence: 99%

The relevance of vein texture in understanding the past hydraulic behaviour of a crystalline rock mass: reconstruction of the palaeohydrology of the Mecsekalja Zone, south Hungary

Dabi¹,

Siklósy²,

Schubert³

et al. 2011

Geofluids

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This study reconstructs the palaeohydrogeologic evolution of the shallow-to-moderate Mesozoic subsidence history for the Mecsekalja Zone (MZ), a narrow metamorphic belt in the eastern Mecsek Mountains, Hungary. Brittle deformation of the MZ produced a vein system with a cement history consisting of five sequential carbonate generations and one quartz phase. Vein textures suggest different fluid-flow mechanisms for the parent fluids of subsequent cement generations. Combined microthermometric and stable-isotope measurements permit reconstruction of the character of subsequent fluid generations with different flow types, as defined by vein textures, yielding new information regarding the hydraulic behaviour of a metamorphic crystalline complex. Textural observations and geochemical data suggest that fracture-controlled flow pathways and externally derived fluids were typical of some flow events, while percolation through the rock matrix and the relationship to the Cretaceous volcanism and dyke emplacement were typical of others. The difference in the mode of calcite deposition from pervasive fluids (i.e. pervasive carbonatisation along grain boundaries versus deposition in antitaxial veins) between two calcite generations related to the volcanism inspired a stress-dependent model of antitaxial vein growth. Textural and isotope variations in a vein generation produced by the same parent fluid indicate rock-dependent hydraulic behaviour for different rock types, distinct action of the contemporaneous fracture systems and different extents of fluid-rock interaction. Cathodoluminescence microscopy and fluid-inclusion microthermometry shed light on the possible role of hydraulic fracturing in the formation of massive calcite. The time of formation was estimated from the isotope composition of the oldest calcite generation and its presumptive relationship with the sedimentary sequences to the north, whereas microthermometry permitted conciliation of the reconstructed flow sequence with the Mesozoic subsidence history of the Mó rá gy Block (including the MZ).

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confidence: 99%

The relevance of vein texture in understanding the past hydraulic behaviour of a crystalline rock mass: reconstruction of the palaeohydrology of the Mecsekalja Zone, south Hungary

Dabi¹,

Siklósy²,

Schubert³

et al. 2011

Geofluids

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“…It completely fills some fractures and lines the sides of open fractures in others (Figure 4). Calcite is among the most common and easily studied fracture-lining mineral that is used to obtain information about the formation fluids from which the calcite precipitated [36,40,41]. In addition, small pockets of fluid that are captured in the interior of calcite crystals (fluid inclusions) commonly can serve as microsamples of the formation fluid [42].…”

Section: Fracture Mineral Analysesmentioning

confidence: 99%

Synthesis of Geochemical and Fracture Mineral Studies Relevant to a Deep Geological Repository for Nonfuel Wastes at Chalk River

King-Sharp¹,

Frape²,

Peterman³

et al. 2016

CNL Nuclear Review

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“…The combination of isotopic characteristics of fracture-fill minerals may yield a very good picture of the nature of the paleowaters from which the calcites precipitated; and thus provide a basis on which to reproduce the paleohydrology of a geological site (McNutt et al, 1990;Stuckless et al, 1991;Wallin and Peterman, 1999;Blyth et al, 2000Blyth et al, , 2009. The present study focuses on aa granitoid bedrock located in the ''Seuil du Poitou'', a basement ridge between the sedimentary Paris basin to the NE and Aquitaine basin to the SW.…”

Section: Introductionmentioning

confidence: 99%

Paleo water–rock interaction determined through isotopic tracing (Sr, O, C, U) in fracture-fill minerals: Evidence from the Vienne granitoids (France)

Négrel

Casanova

Bourguignon

2013

Applied Geochemistry

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Assessing the past thermal and chemical history of fluids in crystalline rock by combining fluid inclusion and isotopic investigations of fracture calcite

Cited by 46 publications

References 20 publications

The relevance of vein texture in understanding the past hydraulic behaviour of a crystalline rock mass: reconstruction of the palaeohydrology of the Mecsekalja Zone, south Hungary

The relevance of vein texture in understanding the past hydraulic behaviour of a crystalline rock mass: reconstruction of the palaeohydrology of the Mecsekalja Zone, south Hungary

Synthesis of Geochemical and Fracture Mineral Studies Relevant to a Deep Geological Repository for Nonfuel Wastes at Chalk River

Paleo water–rock interaction determined through isotopic tracing (Sr, O, C, U) in fracture-fill minerals: Evidence from the Vienne granitoids (France)

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