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Speleology in Kazakhstan

Shakalov on 04 Jul, 2018
Hello everyone!   I pleased to invite you to the official site of Central Asian Karstic-Speleological commission ("Kaspeko")   There, we regularly publish reports about our expeditions, articles and reports on speleotopics, lecture course for instructors, photos etc. ...

New publications on hypogene speleogenesis

Klimchouk on 26 Mar, 2012
Dear Colleagues, This is to draw your attention to several recent publications added to KarstBase, relevant to hypogenic karst/speleogenesis: Corrosion of limestone tablets in sulfidic ground-water: measurements and speleogenetic implications Galdenzi,

The deepest terrestrial animal

Klimchouk on 23 Feb, 2012
A recent publication of Spanish researchers describes the biology of Krubera Cave, including the deepest terrestrial animal ever found: Jordana, Rafael; Baquero, Enrique; Reboleira, Sofía and Sendra, Alberto. ...

Caves - landscapes without light

akop on 05 Feb, 2012
Exhibition dedicated to caves is taking place in the Vienna Natural History Museum   The exhibition at the Natural History Museum presents the surprising variety of caves and cave formations such as stalactites and various crystals. ...

Did you know?

That abris sous roche is (french.) see rock shelter.?

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Featured articles from Cave & Karst Science Journals
Chemistry and Karst, White, William B.
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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;
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Your search for tamarugite (Keyword) returned 4 results for the whole karstbase:
THE RELATIONSHIP BETWEEN CAVE MINERALS AND H2S RICH THERMAL WATERS ALONG THE CERNA VALLEY (SW ROMANIA), 2009, Onac Bogdan P. , Sumrall Jonathan, Tamas Tudor, Povara Ioan, Kearns Joe, Drmiceanu Veronica, Veres Daniel & Lascu Cristian
Within the Cerna Valley in southwestern Romania, over a 100 caves were formed in the Jurassic and Cretaceous limestone that outcrops on the valley walls. Three aspects are prominent when entering most of the caves in this region: the presence of considerable gypsum deposits, the amount of guano, and the cave temperature. High temperature anomalies are uncommon in the cave environment. In certain caves in the lower part of Cerna Valley, however, one can measure air temperatures as high as 40C. This situation is due to the presence of thermal water pooling or =owing through the caves or to the hot steam that rises along fractures from deeper thermal water pools. As a result, these caves provide a unique set of conditions that allowed for the deposition of a suite of unusual minerals. This study presents the results of fiftyy-seven mineral samples that were investigated by means of X-ray diffraction, geochemical, Fourier-transformed infrared spectroscopy, and scanning electron microscope analyses with the scope of linking the cave minerals with likely hypo- gene speleogenetic processes. Here we document the occurrence of twenty-two secondary cave minerals, among which, apjonite and tamarugite are the first recorded occurrences in a limestone cave environment. The minerals fall into three distinct associations: sulfate-dominated (Diana Cave), phosphate-dominated (Adam Shaft), and sulfate-phosphate-nitrate-rich assemblage (Great Salitrari Cave). Additional isotopic measurements performed on sulfate speleothems contribute valuable information on both minerals and cave origins.

The relationship between cave minerals and H2S rich thermal waters along the Cerna Valley (SW Romania), 2009, Onac Bogdan P. , Sumbrall Jonathan, Tamas Tudor, Povara Ioan, Kearns Joe, Darmiceanu Veronica, Veres Daniel, Lascu Cristian

Within the Cerna Valley in southwestern Romania, over a 100 caves were formed in the Jurassic and Cretaceous limestone that outcrops on the valley walls. Three aspects are prominent when entering most of the caves in this region: the presence of considerable gypsum deposits, the amount of guano, and the cave temperature. High temperature anomalies are uncommon in the cave environment. In certain caves in the lower part of Cerna Valley, however, one can measure air temperatures as high as 40°C. This situation is due to the presence of thermal water pooling or =owing through the caves or to the hot steam that rises along fractures from deeper thermal water pools. As a result, these caves provide a unique set of conditions that allowed for the deposition of a suite of unusual minerals. This study presents the results of fiftyy-seven mineral samples that were investigated by means of X-ray diffraction, geochemical, Fourier-transformed infrared spectroscopy, and scanning electron microscope analyses with the scope of linking the cave minerals with likely hypo- gene speleogenetic processes. Here we document the occurrence of twenty-two secondary cave minerals, among which, apjonite and tamarugite are the first recorded occurrences in a limestone cave environment. The minerals fall into three distinct associations: sulfate-dominated (Diana Cave), phosphate-dominated (Adam Shaft), and sulfate-phosphate-nitrate-rich assemblage (Great Salitrari Cave). Additional isotopic measurements performed on sulfate speleothems contribute valuable information on both minerals and cave origins.


The first cave occurrence of orpiment (As₂S₃) from the sulfuric acid caves of Aghia Paraskevi (Kassandra Peninsula, N. Greece), 2011, Lazaridis Georgios, Melfos Vasilios, Papadopoulou Lambrini

Orpiment, tamarugite and pickeringite occur in close association above the surface of thermal water cave pools in the active sulfuric acid caves of Aghia Paraskevi on the Kassandra peninsula, northern Greece. Gypsum also occurs as small interstitial crystals or encrustations. Orpiment is of high significance since it has not previously been reported as a cave mineral. In addition, tamarugite and pickeringite rarely occur in karst caves. Water from a borehole and a spring is of Na-Cl type and contains traces of CO2 and H2S. The B/Cl ratios indicate seawater participation with a possible mixing with geothermal water of meteoric origin. Oxidation of fumarolic H2S and incorporation of seawater is a possible cause for the deposition of tamarugite. Orpiment accumulated from vapors under sub-aerial conditions at low temperatures in acidic conditions through an evaporation-condensation process. Fluid cooling and/or acidification of the solution resulting from H2S oxidation were responsible for orpiment precipitation. Oxidation of H2S to sulfuric acid dissolved the limestone bedrock and deposited gypsum.


THE HYPOGENE ORIGIN OF DIANA CAVE (ROMANIA) AND ITS SULFURIC ACID WEATHERING ENVIRONMENT, 2013, Onac B. P. Puș, Caș, C. M. Effenberger H. S. Povară, I. Wynn J. G.

 

The Diana Cave in SW Romania develops along a fault line at the contact between Late Jurassic limestones and Early Cretaceous marls. It formed through corrosion of bedrock (limestone and marls) by sulphuric acid-rich steam condensate resulted after oxidation/hydrolysis of H2S escaping from the thermo-mineral water emerging from depth in the cave. The sulfuric acid causes a strong acid sulfate weathering of the bedrock generating a sulfate-dominated secondary cave-mineral assemblage that includes gypsum, anhydrite, bassanite, epsomite, alunite, and halotrichite group minerals. Closely associated with these minerals are two rare sulfate species, namely rapidcreekite and tamarugite that represent new occurrences in limestone caves. Traditional X-ray diffraction and single crystal analyses were used along with scanning electron microscope (SEM), stable isotope, and electron microprobe investigations to fully characterize the primary and secondary speleogenetic by-products of Diana Cave.


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