From hydroplastic to brittle deformation: Controls on fluid flow in fold and thrust belts. Insights from the Lower Pedraforca thrust sheet (SE Pyrenees)

Cruset, David; Cantarero, Irene; Benedicto, Antonio; John, Cédric M.; Vergés, Jaume; Albert, Richard; Gerdes, Axel; Travé, Anna

doi:10.1016/j.marpetgeo.2020.104517

Cited by 19 publications

(17 citation statements)

References 117 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, the similar C‐isotope composition can be interpreted to reflect a low mixing ratio of magmatic and/or igneous derived fluids. The δ 18 O and REE + Y signals of primitive deep‐seated hydrothermal fluids changed significantly upon mixing with external fluid, while δ 13 C remained relatively constant may be caused by their different concentrations (Banner & Hanson, 1990; Cruset et al., 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Under ideal conditions, such as long enough reaction time or insufficient fluid fluxes, a geochemical composition equilibrium between fluids and host rocks would eventually be achieved (Kirschner & Kennedy, 2001). However, the more depleted δ 18 O values and the different REE + Y compositions for Cd, Sd and Qd dolomites compared to the adjacent host rocks indicate only partial re-equilibration between dolomitising fluids and surrounding sediments, thus suggesting low fluid-rock interactions or a hydrologically open fluid system (Cruset et al, 2016(Cruset et al, , 2018(Cruset et al, , 2020. The burial history shows that at the time of hydrothermal dolomitisation, the strata were buried deeper than 3,000 m (Wang et al, 2014).…”

Section: Evolutions Of the Dolomitising Fluidsmentioning

confidence: 99%

See 1 more Smart Citation

Volcanic events‐related hydrothermal dolomitisation and silicification controlled by intra‐cratonic strike‐slip fault systems: Insights from the northern slope of the Tazhong Uplift, Tarim Basin, China

et al. 2021

View full text Add to dashboard Cite

Ordovician carbonate rocks on the northern slope of the Tazhong Uplift in the Tarim Basin are modified to varying degrees by hydrothermal fluids related to multiple tectonic-thermal events, but the nature, origin and circulation mechanisms of such hydrothermal fluids remain debated. In this article, in situ rare-earth elements and yttrium (REE + Y) concentrations, previously published geochemical datasets and petrographic investigations are integrated to develop a thermo-tectonic evolution model to improve understanding of silicification and dolomitisation occurring in the interior of the craton basin. δ 30 Si values, REE + Y ratios and fluid mixing models using modern black smoker fluid and seawater indicate that magma-sourced hydrothermal fluids, rather than basinal brine heated by magmatism, are responsible for the precipitation of cherts. Petrological and geochemical evidence suggests that deep-seated, ultramafic-derived hydrothermal fluids and/or magmatic fluids associated with Permian volcanism may have been involved in the formation of hydrothermal dolomites in the study area. Accompanying formation and reactivation of the strike-slip faults on the northern slope of the Tazhong Uplift, small volumes of hydrothermal fluids might have been triggered by seismic pumping. The early formed strike-slip fault systems may also have served as conduits for the subsequent large-scale transport of deep-seated, ultramafic-derived thermal fluids and/or Permian magmatic fluids, along which fluids were transported upwards at high flow rates. Carbonation of ultramafic rocks through interaction with deep-seated hydrothermal fluids rich in CO 2 may have served as a magnesium and silica source for dolomitisation and silicification. Trans-tensional troughs on NNE-trending strike-slip faults with positive flower structure are favourable locations for dolomitisation and silicification.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Evolutions Of the Dolomitising Fluidsmentioning

confidence: 99%

Volcanic events‐related hydrothermal dolomitisation and silicification controlled by intra‐cratonic strike‐slip fault systems: Insights from the northern slope of the Tazhong Uplift, Tarim Basin, China

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Besides, the well-exposed outcrops can provide excellent reservoir analogues to investigate fracture distributions in folded alluvial-fluvial successions at basin margins. However, most studies of the southern Pyrenees focused on unravelling the different 4 tectonic events and/or analysing the fingerprints of fluids to decipher the evolution of fluid flow (Travé et al, 2000;Beaudoin et al, 2015;Taillefer et al, 2017;Cruset et al, 2018Cruset et al, , 2020Lacroix et al, 2018;Nardini et al, 2019;Muñoz-López et al, 2020b), while only a few studies focused on the formation or distribution of fractures (e.g., Tavani et al, 2011Tavani et al, , 2020Gutmanis et al, 2018). Here we present a systematic analysis of the fracture network of a folded fluvial succession exposed in the Puig-reig anticline.…”

Section: Introductionmentioning

confidence: 99%

Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)

X¹,

Gomez‐Rivas²,

Alcalde³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Sedimentary rocks of foreland fold-and-thrust belts typically undergo intensive fracturing as fold grows. The resulting fracture networks can present significant variations depending on the distribution of sedimentary facies and the complex structural characteristics of fold-and-thrust belts. The Puig-reig anticline, located in the south-eastern Pyrenees, mainly exposes proximal fluvial deposits in the north limb and medial fluvial deposits in the rest of the anticline. Thus, this anticline constitutes an excellent case study to investigate the main controls on the distribution of fracture networks in folded fluvial deposits, in terms of structural position and lithofacies variations. Outcrops were selected to be representative of different structural positions, from the fold hinge to its limbs, and of a variety of the main lithofacies, from proximal to medial fluvial deposits. Fracture data were acquired using the linear scanline method. Results indicate that the anticline is affected by four sets of fractures. The north limb is dominated by thick conglomerate bodies with interlayered sandstones deposited from unconfined flash floods and wide-shallow channel streams in the proximal fluvial fan, and presents large fracture spacing and low fracture intensity but relatively large fracture length and aperture. The crest and the crest-limb transition zones are mainly composed of interlayered conglomerates, sandstones, siltstones and clays, deposited from braided channel streams and overbanks in the medial fluvial fan and present fractures with relatively high fracture intensity and variable fracture length and aperture. The south limb, composed of channel filling sandstone layers and stable overbank fine deposits in the medial fluvial fan, is characterised by low fracture intensity and small fracture length and aperture. Based on multiple linear regression analysis, fracture intensity is mainly controlled by the structural position, bedding thickness and lithological associations, with relatively more intense fracturing in thin sandstone layers with multiple interlayers of fine deposits in the anticline crest. The fracture length is mainly controlled by bedding thickness 2 and is affected lithological associations. The fracture apertures are mainly controlled by lithofacies, with relatively higher apertures affecting conglomerate bodies. The results of this study are relevant for characterising similar systems in the subsurface, where data is scarce.

show abstract

“…These extrabasinal carbonate grains favour the nucleation and growth of carbonate cement in these alluvial-fluvial deposits. In addition, at foreland basin margins, intensive fracturing, thrusting and folding are accompanied with fluid flow of various geological fluids including hydrothermal, meteoric and formation fluids, from which carbonate cement precipitates (Travé et al, 1997(Travé et al, , 2000(Travé et al, , 2007Cruset et al, 2018Cruset et al, , 2020. Thus, intensive carbonate cementation can result in an overall or localised low matrix porosity of alluvial-fluvial deposits at basin margins, e.g., the Peraltilla and Sariñena formations in the central Ebro Basin (Yuste et al, 2004), the Berga Group and the Solsona Formation in the eastern Ebro Basin (Cruset et al, 2016), the Siwalik Group in the Himalayan Basin (Guilbaud et al, 2012), and the Wuqia Group and the Artux Formation in the south-western Tarim Basin (Zheng et al, 2006).…”

Section: Reservoir Potential Of Folded Alluvial-fluvial Successions At Foreland Basin Marginsmentioning

confidence: 99%

Fluvial sedimentation and its reservoir potential at foreland basin margins: A case study of the Puig-reig anticline (South-eastern Pyrenees)

X¹,

Alcalde²,

Gomez‐Rivas³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Fluvial fans represent one of the dominant sedimentary systems at the active margins of non-marine foreland basins. The Puig-reig anticline at the north-eastern margin of the Ebro Foreland Basin (SE Pyrenees, Spain) exposes continuous outcrops of late Eocene-early Oligocene fluvial deposits, from proximal to medial fluvial fan environments. The proximal deposits, located in the northern limb of the anticline, especially in the northwest zone, are characterised by conglomerates with minor interbedded sandstones, which present thick and wide sheet-like geometries with unscoured or scoured basal surfaces. These are interpreted to be the deposits of unconfined flash floods and wide-shallow channel streams. The medial deposits, covering the rest of the anticline, consist of interbedded beds of conglomerates, sandstones and claystones, deposited from braided channel streams and overbanks. Distal deposits are found towards the south, beyond the anticline, and are characterised by sandstone and clay deposits of terminal lobes or lacustrine deltas and interdistributary bays. This study assesses the impact of the primary depositional characteristics, diagenesis and deformation of the most heterolithic portion of the system, with implications for the understanding of folded fluvial reservoirs. Diagenetic processes, mainly mechanical compaction and calcite cementation, resulted in overall low matrix porosity, with limited relatively higher porosity developed in sandstone lithofacies in the medial deposits. Deformation associated with thrusting and fold growth resulted in the formation of abundant fractures, with relatively higher fracture intensities observed in sandstone lithofacies in the anticline crest. This study shows that post depositional processes can both improve and diminish the reservoir potential of basin proximal fluvial deposits, by the development of open fracture networks and by compaction-cementation, respectively. The comparison of the Puig-reig anticline with other similar settings worldwide shows that foreland basin margin locations can be potential areas for effective reservoirs, even in the case of low matrix porosity.

show abstract

From hydroplastic to brittle deformation: Controls on fluid flow in fold and thrust belts. Insights from the Lower Pedraforca thrust sheet (SE Pyrenees)

Cited by 19 publications

References 117 publications

Volcanic events‐related hydrothermal dolomitisation and silicification controlled by intra‐cratonic strike‐slip fault systems: Insights from the northern slope of the Tazhong Uplift, Tarim Basin, China

Volcanic events‐related hydrothermal dolomitisation and silicification controlled by intra‐cratonic strike‐slip fault systems: Insights from the northern slope of the Tazhong Uplift, Tarim Basin, China

Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)

Fluvial sedimentation and its reservoir potential at foreland basin margins: A case study of the Puig-reig anticline (South-eastern Pyrenees)

Contact Info

Product

Resources

About