Coring Site / Carottage THU10-I (IGSN IEFRA00BB) - Lac de la Thuile - Avril 2010 - ROZA Zone Atelier Alpes

Core THU10-I : 18m long core

An 18-m-long core was extracted in April 2010 from Lake "La Thuile" using a Uwitec platform and coring devices (Uwitec Usinger 90, Niederrreiter 63, Uwitec Gravity Pilote device) .

(IEFRA00BB THU10-I https://www.cybercarotheque.fr/index.php?virt=4 21)

Context of the study :

Lake La Thuile, in the Northern French Prealps (874 m a.s.l.), provides an 18-m long sedimentary sequence spanning the entire Lateglacial/Holocene

period. The high-resolution multi-proxy (sedimentological, palynological, and geochemical) analysis of the uppermost 6.2 m reveals the Holocene dynamics of erosion in the catchment in response to landscape modifications. The mountain belt is at relevant altitude to study past human activities, and the watershed is sufficiently disconnected from large valleys to capture a local sedimentary signal. From 12,000 to 10,000 cal. BP (10–8 kyr cal. BC), the onset of hardwood species triggered a drop in erosion following the Lateglacial/Holocene transition. From 10,000 to 4500 cal. BP (8–2.5 kyr cal. BC), the forest became denser and favored slope stabilization, while erosion processes were very weak. A first erosive phase was initiated at ca. 4500 cal. BP without evidence of human presence in the catchment. Then, the forest declined at approximately 3000 cal. BP, suggesting the first human influence on the landscape. Two other erosive phases are related to anthropic activities: approximately 2500 cal. BP (550 cal. BC) during the Roman period and after 1600 cal. BP (350 cal. AD) with a substantial accentuation in the Middle Ages. In contrast, the lower erosion produced during the ‘Little Ice Age’, when climate deteriorations are generally considered to result in an increased erosion signal in this region, suggests that anthropic activities dominated the erosive processes and completely masked the natural effects of climate on erosion in the late Holocene.

Keywords : climate, Holocene, human activities, montane lake, terrigenous inputs, vegetation

Date (Creation): 2016-08-31T10:00:00

Citation identifier: https://portail.indigeo.fr/geonetwork/srv/metadata/12c4141e-2cdd-40a0-bf62-83ef3335f695

Status: Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
EDYTEM UMR5204 (ISNI:0000 0001 2109 3638)	Cécile Pignol (orcid:0000-0003-4411-8898)	Curator-Edytem@univ-savoie.fr	Point of contact

Maintenance and update frequency: Not planned

GEMET

données géoréférencées

GEMET - Concepts, version 2.4

sédiment
lac
échantillonnage
environnement

Régions de France

RHONE-ALPES

Theme

ZAA
Zone Atelier Alpes

Use limitation: Utilisation libre sous réserve de mentionner la source (a minima le nom du producteur) et la date de sa dernière mise à jour

Access constraints: Other restrictions

Use constraints: Intellectual property rights

Other constraints: Le partenaire fournisseur n’est pas en mesure de garantir l’exactitude, la mise à jour, l’intégrité, l’exhaustivité des données et en particulier qu'elles sont exemptes d'erreurs ou d'imprécisions, notamment de localisation, d’identification ou de qualification. Aucune garantie quant à l'aptitude des données à un usage particulier n'est apportée par le partenaire fournisseur. Les utilisateurs utilisent les données sous leur responsabilité pleine et entière, sans recours possible contre le partenaire fournisseur dont la responsabilité ne saurait être engagée du fait d’un dommage résultant directement ou indirectement de l’utilisation de ces données. En particulier, il appartient aux utilisateurs d’apprécier, sous leur seule responsabilité : l'opportunité d'utiliser les données; la compatibilité des fichiers avec leurs systèmes informatiques; l’adéquation des données à leurs besoins; qu’ils disposent de la compétence suffisante pour utiliser les données. Le fournisseur partenaire n’est en aucune façon responsable des éléments extérieurs aux données et notamment des outils d’analyse, matériels, logiciels, réseaux..., utilisés pour consulter et/ou traiter les données. L’utilisateur veille à vérifier que l’actualité des informations mises à disposition est compatible avec l’usage qu’il en fait

Spatial representation type: Vector

Denominator: 1000

Language: fre

Character set: UTF8

Topic category

Geoscientific information

Begin date: 2010-04-25

End date: 2010-04-25

Reference system identifier: EPSG / WGS 84 EPSG:4326 / 7.4

Distribution format

Name	Version
Texte	6.0

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
DT INSU - CNRS, La seyne sur Mer	Elodie Godinho		Distributor

OnLine resource

Protocol	Linkage	Name
WWW:LINK-1.0-http--link	https://www.cybercarotheque.fr/index.php?virt=421	Cyber-carothèque nationale francaise C2FN
WWW:LINK-1.0-http--link	http://hol.sagepub.com/content/26/3/350.abstract
WWW:LINK-1.0-http--link	https://hal.archives-ouvertes.fr/hal-01758971	Erosion record in Lake La Thuile sediments (Prealps, France): Evidence of montane landscape dynamics throughout the Holocene

Hierarchy level: Dataset

Conformance result

Date (Publication): 2013-10-21

Explanation: L’article 7, paragraphe 1, de la directive 2007/2/CE correspond aux modalités techniques de

l’interopérabilité : il s’agit du règlement relatif à l’interopérabilité : règlement n°1253/2013 du

21 octobre 2013 modifiant et complétant le règlement n°1089/2010 du 23 novembre 2010

Pass: Yes

Statement: Coring and sediment lithological description :

An 18-m-long core was extracted in April 2010 from Lake "La Thuile" using a Uwitec platform and coring devices (Uwitec Usinger 90, Niederrreiter 63, Uwitec Gravity Pilote device) . The core was retrieved from the deepest part of the lake (8 m depth, N45 31.813, E6 03.394). The sediment long sequence (THU10, IGSN:IEFRA00BB – IGSN codes refer to an open international database, www.geosamples.org) is composed of two overlapping core sites, THU10-01 and THU10-02, made of seven and nine sections, respectively. Sections from the second hole were taken following a 1-m shift in depth to ensure a sufficient overlap to provide a continuous record. A short gravity core was also taken to provide a well-preserved water–sediment interface sample (IGSN: IEFRA00BA) which was subsequently correlated to the composite sequence. At the EDYTEM laboratory, the cores were split into two halves. Each half-section was described in detail and pictures were taken with a 20-pixel mm−1 resolution. The lithological description of the sequence allowed the identification of different sedimentary units. A composite profile was built using clearly identifiable layers from the overlapping sections of all cores. Except for the first centimeters of the interface core, no compaction due to the coring system was observed.

Principal Investigator : CROUZET C (ORCID:0000-0002-4138-5213 )

Corer Operators : ARNAUD Fabien (ORCID:0000-0002-8706-9902) , Laurent augustin,

Metadata

File identifier: f5e3f5b8-dcfb-4a95-b409-bc8d9fc724fa XML

Metadata language: fre

Character set: UTF8

Hierarchy level: Dataset

Date stamp: 2023-03-06T16:12:38

Metadata standard name: ISO 19115

Metadata standard version: 1.0

Metadata author

Organisation name	Individual name	Electronic mail address	Role
EDYTEM UMR5204 (ISNI:0000 0001 2109 3638)	Cécile Pignol (orcid:0000-0003-4411-8898)	Curator-Edytem@univ-savoie.fr	Point of contact
ISTERRE (ISNI: 0000 0004 5376 3722)	CROUZET C (ORCID:0000-0002-4138-5213 )	Curator-Edytem@univ-savoie.fr	Point of contact
EDYTEM UMR5204 (ISNI:0000 0001 2109 3638)	Manon Bajard (orcid:0000-0003-4622-0482)	Curator-Edytem@univ-savoie.fr	Point of contact