KarstBase a bibliography database in karst and cave science.
Featured articles from Cave & Karst Science Journals
Characterization of minothems at Libiola (NW Italy): morphological, mineralogical, and geochemical study, Carbone Cristina; Dinelli Enrico; De Waele Jo
Chemistry and Karst, White, William B.
The karst paradigm: changes, trends and perspectives, Klimchouk, Alexander
Long-term erosion rate measurements in gypsum caves of Sorbas (SE Spain) by the Micro-Erosion Meter method, Sanna, Laura; De Waele, Jo; Calaforra, José Maria; Forti, Paolo
The use of damaged speleothems and in situ fault displacement monitoring to characterise active tectonic structures: an example from Zapadni Cave, Czech Republic , Briestensky, Milos; Stemberk, Josef; Rowberry, Matt D.;
Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
Chemical Geology, 2000, Vol 162, Issue 5, p. 221-243
Comparative study of a stalagmite sample by stratigraphy, laser induced fluorescence spectroscopy, EPR spectrometry and reflectance imaging
Perrette Yves, Delannoy Jean Jacques, Bolvin Herve, Cordonnier Michel, Destombes Jean Luc, Zhilinskaya Elena A. , Aboukais Antoine,
Abstract:
In the last few years, it has been shown that multi-proxy data are recorded in speleothems and that these secondary deposits can be used to retrieve records of environmental evolution in extra-glacial continental conditions. The goal of many current research is to obtain a better understanding of the processes leading to the growth of these chemical sediments and to relate them to changes in environmental conditions. In the present research, the multi-proxy study of a well-laminated speleothem sample points out the interest of reflectance trend measurement as a water excess indicator. Results from stratigraphy, laser induced fluorescence spectroscopy, EPR spectrometry and reflectance imaging have been combined in order to get a better understanding of the environmental conditions pertaining during speleothem growth. Several parameters have been measured: (i) Mn2 concentration evolution (shown to be linked to soil processes); (ii) linewidth [Delta]H of the low field Mn2 EPR line (linked to crystalline properties of the speleothem); (iii) intensities of the laser excited fluorescence (linked to organic matter content of calcite) and reflectance (linked to calcite porosity); (iv) wavelength [lambda]peak of the intensity maximum of laser excited fluorescence bands (linked to the size of trapped organic molecules). Other data resulting from statistical treatment of the annual fluorescence cycles have also been used. Significant correlations demonstrate the covariation of [lambda]peak and calcite reflectance with the hydrological regime of the cave. In the well drained soils of a karstic area, Mn2 and [lambda]peak appear to be accurate proxies for soil moisture evolution, directly linked to the water excess. These results are confirmed by the comparison with historical knowledge of environmental changes of the surrounding plateau
In the last few years, it has been shown that multi-proxy data are recorded in speleothems and that these secondary deposits can be used to retrieve records of environmental evolution in extra-glacial continental conditions. The goal of many current research is to obtain a better understanding of the processes leading to the growth of these chemical sediments and to relate them to changes in environmental conditions. In the present research, the multi-proxy study of a well-laminated speleothem sample points out the interest of reflectance trend measurement as a water excess indicator. Results from stratigraphy, laser induced fluorescence spectroscopy, EPR spectrometry and reflectance imaging have been combined in order to get a better understanding of the environmental conditions pertaining during speleothem growth. Several parameters have been measured: (i) Mn2 concentration evolution (shown to be linked to soil processes); (ii) linewidth [Delta]H of the low field Mn2 EPR line (linked to crystalline properties of the speleothem); (iii) intensities of the laser excited fluorescence (linked to organic matter content of calcite) and reflectance (linked to calcite porosity); (iv) wavelength [lambda]peak of the intensity maximum of laser excited fluorescence bands (linked to the size of trapped organic molecules). Other data resulting from statistical treatment of the annual fluorescence cycles have also been used. Significant correlations demonstrate the covariation of [lambda]peak and calcite reflectance with the hydrological regime of the cave. In the well drained soils of a karstic area, Mn2 and [lambda]peak appear to be accurate proxies for soil moisture evolution, directly linked to the water excess. These results are confirmed by the comparison with historical knowledge of environmental changes of the surrounding plateau
Keywords: area, calcite, cave, chemical sediment, correlation, cycles, deposit, deposits, epr, evolution, field, fluorescence, growth, indicator, intensity, laser, manganese, matter, moisture, organic matter, organic-matter, paleoenvironment, parameters, plateau, points, porosity, record, records, reflectance, regime, sample, sediment, sediments, size, soil, soil moisture, soil-moisture, soils, spectroscopy, speleothem, speleothems, stalagmite, stratigraphy, water,