Geologica Belgica

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Sophie VERHEYDEN, Eddy KEPPENS, Yves QUINIF, Hai J. CHENG & Laurence R. EDWARDS

Late-glacial and Holocene climate reconstruction as inferred from a stalagmite - grotte du Père Noël, Han-sur-Lesse, Belgium

(volume 17 (2014))
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Mots-clés : stable isotopes, speleothem, Mg, Sr, growth rate, U-series dating

Abstract

The 64.5 cm long Père Noël stalagmite PN-95-5 was deposited between 12.9 ka and 1.8 ka (U-series dated) with an uncertainty on the ages of the order of ca. 100 years.  Besides changes in the macroscopic aspect of the stalagmite along its longitudinal section, changes in its isotopic (18O and 3C) and chemical (Sr/Ca, Mg/Ca) composition are observed. These changes, combined with changes in stalagmite diameter are interpreted in terms of changes in climate in the Han-sur-Lesse region. This multi-proxy approach based on previous studies of the chemical and isotopic functioning of the cave suggests a generally wet early Holocene, important and rapid dry-wet changes around 8.5 ka, a wetter and warmer period between 7.9 ka and 6.6 ka and a dry and/or colder climate after 6.6 ka. This preliminary interpretation from the Père Noël speleothem should be tested against other speleothems and from other caves to construct a regional climate model for the Holocene.

Om dit artikel te citeren:

Sophie VERHEYDEN, Eddy KEPPENS, Yves QUINIF, Hai J. CHENG & Laurence R. EDWARDS, «Late-glacial and Holocene climate reconstruction as inferred from a stalagmite - grotte du Père Noël, Han-sur-Lesse, Belgium», Geologica Belgica [En ligne], volume 17 (2014), 83-89 URL : https://popups.uliege.be/1374-8505/index.php?id=4412.

Over : Sophie VERHEYDEN

Royal Belgian Institute of Natural Sciences, Geological Survey, Jenner straat 13, B-1000 Brussels and Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium. E-mail: sophie.verheyden@naturalsciences.be

Over : Eddy KEPPENS

Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.

Over : Yves QUINIF

Université de Mons, Rue de Houdain 9, B-7000 Mons, Belgium.

Over : Hai J. CHENG

Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China and Department of Geological Sciences, University of Minnesota, 100 Union Street SE, Minneapolis MN 55455, USA.

Over : Laurence R. EDWARDS

Department of Geological Sciences, University of Minnesota, 100 Union Street SE, Minneapolis MN 55455, USA.