Analyse des sediments polygeniques neogenes a facies de cargneules associes a des gypses dans les Alpes du Sud; extension de ces facies au pourtour de la Mediterranee occidentale

Grandjacquet, C.; Haccard, D.

doi:10.2113/gssgfbull.s7-xvii.2.242

Cited by 7 publications

(6 citation statements)

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“…The controversy over the age, nature and definition of cargneule in the Digne and Var region of the external zones, Provence, France (Grandjacquet & Haccard, 1975) is beyond the scope of this paper. Here I consider those which can be related to the internal zones of the Alps.…”

Section: The Origin Of Cargneulementioning

confidence: 97%

“…Cargneule (Warrak, 1974;Grandjacquet & Haccard, 1975) is a non-dolomitic veined or brecciated carbonated rock, usually yellow-brown in colour associated with Trias dolomite, gypsum and anhydrite. In this paper I have followed recent French authors in the spelling of 'cargneule' in preference to 'cornieule', favoured on historical grounds by Weidman (1971).…”

Section: Cargneulementioning

confidence: 99%

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The tectonic significance of Triassic dolomite and cargneule in the Gran Paradiso region, Western Alps

Vearncombe

1982

Geol. Mag.

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The interrelationships of dolomite, anhydrite, gypsum and cargneule (a yellow-brown dedolomitised breccia), are discussed with specific reference to the Gran Paradiso region, Western Alps. The dolomite is a highly deformed rock which occurs along the soles of both early and late-Alpine thrusts. Evidence suggests that cargneule formed late in the geological history of the region. It is suggested that dolomite + anhydrite + water acted as an important decollement horizon. Recent exposure to the surface, hydration of anhydrite to gypsum and dedolomitisation resulted in cargneule formation.

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Section: The Origin Of Cargneulementioning

confidence: 97%

Section: Cargneulementioning

confidence: 99%

The tectonic significance of Triassic dolomite and cargneule in the Gran Paradiso region, Western Alps

Vearncombe

1982

Geol. Mag.

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“…They are however known within some syn-tectonic tertiary flyschs [16,17]. Accordingly, it seems that the "primary" cornieules were not formed during the beginning of the Alpine event but close to its end.…”

Section: Origin Of the Mont-jovet Pseudo-cornieulesmentioning

confidence: 99%

“…For Grandjacquet and Haccard [16,17], the cornieules of the south-western Alps, are syn-to-post-tectonic sediments. They postulate that cornieules represent a tectono-sedimentary complex formed during the Neogene thrusting of the Digne and Castellane areas.…”

Section: Introductionmentioning

confidence: 99%

Dykes and Pipes of Remobilized Cornieules within the Cornieule Evaporitic-Complex of the Mont Jovet Area (Northwestern French Alps)

2010

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Dykes and pipes of remobilized cornieules outcrop widely within the evaporitic complex of the thrust sole of the Mont Jovet klippe, (NorthWestern French Alps). The morphology, nature, structures and pattern of these rocks are described. The bodies are not linked to erosive processes; they represent inherited morphologies within the gypsum exhumed by erosion. These upstanding pseudo-cornieules very likely originated from fault-related remobilization of primary cornieules from the tectonic contact. A genetic model is proposed to explain the genesis of these pseudocornieules, to highlight the possible relationships between these pseudo-cornieules and the other documented types of cornieules.

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“…Many authors have studied similar breccia formations in the Alpine system (Goguel, 1936; Bruckner, 1941; Ricour, 1962; Sturani, 1963; Warrak, 1974; Grandjacquet & Haccard, 1975; Bourgois, 1979). Re‐examination of their origin, considering the possibility that they are of evaporite solution‐collapse origin, is worthwhile.…”

Section: Introductionmentioning

confidence: 99%

Facies analysis of the Trypali carbonate unit (Upper Triassic) in central‐western Crete (Greece): an evaporite formation transformed into solution‐collapse breccias

Pomoni-Papaioannou¹,

Karakitsios²

2002

Sedimentology

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The Trypali carbonate unit (Upper Triassic), which crops out mainly in central‐western Crete, occurs between the parautochthonous series (Plattenkalk or Talea Ori‐Ida series, e.g. metamorphic Ionian series) and the Tripolis nappe (comprising the Tripolis carbonate series and including a basal Phyllite–Quartzite unit). It consists of interbedded dolomitic layers, represented principally by algally laminated peloidal mudstones, foraminiferal, peloidal and ooidal grainstones, as well as by fine‐grained detrital carbonate layers, in which coarse baroque dolomite crystals and dolomite nodules are dispersed. Baroque dolomite is present as pseudomorphs after evaporite crystals (nodules and rosettes), which grew penecontemporaneously by displacement and/or replacement of the host sediments (sabkha diagenesis). However, portions of the evaporites show evidence of resedimentation. Pre‐existing evaporites predominantly consisted of skeletal halite crystals that formed from fragmentation of pyramidal‐shaped hoppers, as well as of anhydrite nodules and rosettes (salt crusts). All microfacies are characteristic of peritidal depositional environments, such as sabkhas, tidal flats, shallow hypersaline lagoons, tidal bars and/or tidal channels. Along most horizons, the Trypali unit is strongly brecciated. These breccias are of solution‐collapse origin, forming after the removal of evaporite beds. Evaporite‐related diagenetic fabrics show that there was extensive dissolution and replacement of pre‐existing evaporites, which resulted in solution‐collapse of the carbonate beds. Evaporite replacement fabrics, including calcitized and silicified evaporite crystals, are present in cements in the carbonate breccias. Brecciation was a multistage process; it started in the Triassic, but was most active in the Tertiary, in association with uplift and ground‐water flow (telogenetic alteration). During late diagenesis, in zones of intense evaporite leaching and brecciation, solution‐collapse breccias were transformed to rauhwackes. The Trypali carbonate breccias (Trypali unit) are lithologically and texturally similar to the Triassic solution‐collapse breccias of the Ionian zone (continental Greece). The evaporites probably represent a major diapiric injection along the base of the parautochthonous series (metamorphic Ionian series) and also along the overthrust surface separating the parautochthonous series from the Tripolis nappe (Phyllite–Quartzite and Tripolis series). The injected evaporites were subsequently transformed into solution‐collapse breccias.

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Analyse des sediments polygeniques neogenes a facies de cargneules associes a des gypses dans les Alpes du Sud; extension de ces facies au pourtour de la Mediterranee occidentale

Cited by 7 publications

References 0 publications

The tectonic significance of Triassic dolomite and cargneule in the Gran Paradiso region, Western Alps

The tectonic significance of Triassic dolomite and cargneule in the Gran Paradiso region, Western Alps

Dykes and Pipes of Remobilized Cornieules within the Cornieule Evaporitic-Complex of the Mont Jovet Area (Northwestern French Alps)

Facies analysis of the Trypali carbonate unit (Upper Triassic) in central‐western Crete (Greece): an evaporite formation transformed into solution‐collapse breccias

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