Karstbase Bibliography Database

SpðOtl, Christoph; Desch, Angelika; Dublyansky, Yuri; Plan, Lukas; Mangini, Augusto
Hypogene speleogenesis in dolomite host rock by co2-rich fluids, kozak cave (southern austria)
Geomorphology
2015
1
27

A growing number of studies suggest that cave formation by deep-seated groundwater  (hypogene) is a more common process of subsurface water-rock interaction than previously  thought. Fossil hypogene caves are identified by a characteristic suite of morphological  features on different spatial scales. In addition, mineral deposits (speleothems) may provide  clues about the chemical composition of the paleowater, which range from CO2-rich to  sulfuric acid-bearing waters. This is one of the first studies to examine hypogene cave  formation in dolomite. Kozak Cave is a fossil cave near the Periadriatic Lineament, an area  known for its abundance of CO2-rich springs. The cave displays a number of macro-, mesoand  micromorphological elements found also in other hypogene caves hosted in limestone,  marble or gypsum, including cupolas, cusps, Laughöhle-type chambers and notches. The  existance of cupolas and cusps suggests a thermal gradient capable of sustaining free  convection during a first phase of speleogenesis, while triangular cross sections (Laughöhle  morphology) indicate subsequent density-driven convection close to the paleowater table Notches mark the final emergence of the cave due to continued rock uplift and valley  incision. Very narrow shafts near the end of the cave may be part of the initial feeder system,  but an epigene (vadose) overprint cannot be ruled out. Vadose speleothems indicate that the  phreatic phase ended at least about half a million years ago. Drill cores show no evidence of  carbon or oxygen isotope alteration of the wall rock. This is in contrast to similar studies in  limestone caves, and highlights the need for further wall-rock studies of caves hosted in  limestone and dolomite

Speleogenesis; hypogene; cave morphology; stable isotopes; Austria

0169-555X
0.1016/j.geomorph.2015.12.001
SpðOtl, Christoph; Desch, Angelika; Dublyansky, Yuri; Plan, Lukas; Mangini, Augusto, 2015, Hypogene speleogenesis in dolomite host rock by co2-rich fluids, kozak cave (southern austria) , Geomorphology , 1 - 27 http://www.sciencedirect.com/science/article/pii/S0169555X1530221X, PDF