Terroir 2006 banner
IVES 9 IVES Conference Series 9 Results of late-wurmian to present-day climatic-geological evolution on to spatial variability of pedologic-geological characters of the AOC Gaillac terroirs (Tarn, Midi-Pyrénées)

Results of late-wurmian to present-day climatic-geological evolution on to spatial variability of pedologic-geological characters of the AOC Gaillac terroirs (Tarn, Midi-Pyrénées)

Abstract

The AOC Gaillac area is divided into three main terroirs : « The left bank terraces », « The right bank coteaux » and « The plateau Cordais ». This division is valid at a regional scale, but it suffers of a number of local-scale exceptions. This spatial variability of the pedologic-geologic characteristics at the plot scale has been derived mainly from the main late-Würmian solifluxion phase occurring at the transition between the peri-glacial climate and the Holocene temperate conditions (13,000-10,000 yrs BP). This soil movement processing has generated tongue-shaped features composed of a mixed molassic-fluviatil material mostly on north-oriented slopes, concealing the in-situ molassic bedrock. This spatial variability has to be taken into account in any viticultural zoning strategy using extraction of morphometric data from a Digital Elevation Model (DEM) as slope gradient and slope orientation maps.

DOI:

Publication date: December 22, 2021

Issue: Terroir 2006

Type: Article

Authors

Pierre COURJAULT-RADE (1), Marguerite MUNOZ (1), Eric MAIRE1 et Nicolas HIRISSOU (2)

(1) Laboratoire des Mécanismes de Transferts en Géologie (LMTG), UMR 5563 CNRS, 14, avenue E. Belin, 31400 Toulouse, France
(2) Domaine du Moulin, chemin de Bastié, 81600 Gaillac, France

Contact the author

Keywords

Gaillac, geology, scale analysis, terroirs, viticultural zoning

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

Soil and topography effects on water status and must composition of chardonnay in burgundy & a mini meta‐analysis of the δ 13C/water potentials correlation

The measurement of carbon isotopic discrimination in grape sugars 13 at harvest (δ C) is an integrated assessment of water status during ripening.

High-power ultrasound for improving chromatic characteristics in wines. Does a varietal effect exist?

The use of high-power ultrasound (US) during the winemaking process has been extensively studied at laboratory scale in order to demonstrate its possible use to improve the extraction of compounds of interest. However, studies on semi-industrial and industrial scale are needed to confirm this positive effect, since the International Organization of Vine and Wine approved its industrial use in 2019 [1].

Soluble solids and firmness responses of a very slow ripening mutant to ripening acceleration treatments

Wine grapes have the ability to accumulate high amounts of hexoses (glucose and fructose), which is considered one of the main processes occurring during the ripening stage. Sugar accumulation dynamics respond to genetic, environmental and vineyard management factors, with a changing climate leading to advanced and faster sugar accumulation worldwide. Research on mitigation techniques to this phenomenon is ongoing, with the largest focus being vineyard techniques to delay sugar accumulation. Breeding represents another powerful tool to address the issue of high sugar concentration at harvest, since historical trends of selecting best sugar-accumulators may be inverted to breed varieties that accumulate diminished concentrations of hexoses while maintaining optimal acidity, color, mouthfeel and aroma compounds.

A new path for sustainable development. First results in a Venetian “bio-métaéthique company“ (Italy)

This paper will show the results of changes in income in a Veneto winery located in the municipality of Motta di Livenza (Treviso) in the North East of Italy, determined by the application of the “Holistic Universal Sustainability Charter” Metaethic 4.1CC “or” Sustainability Charter BIO-MétaÉthique 4.1CC “of GiESCO (Carbonneau, Cargnello, 2017).

Effects of fast dehydration at low temperature and relative humidity on the phenolic composition of Nebbiolo grapes

Grape postharvest dehydration is a widely used technique for the special wines production, where genetic features, ripeness degree and environmental factors strongly influence the metabolic processes [1].