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Book Chapter

Arid hypogene karst in a multi-aquifer system: hydrogeology and speleogenesis of Ashalim Cave, Negev Desert, Israel

By
Amos Frumkin
Amos Frumkin
Israel Cave Research Center, Institute of Earth Sciences, The Hebrew University of Jerusalem, Israel 91904
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Boaz Langford
Boaz Langford
Israel Cave Research Center, Institute of Earth Sciences, The Hebrew University of Jerusalem, Israel 91904
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Published:
January 01, 2018

Abstract

Ashalim maze cave, and neighbouring caves in the NW Negev Desert, Israel demonstrate hypogene karst features. These features are shown to have developed as a result of the mixing of two types of groundwater flowing in opposite directions within two tiers of Cretaceous rock aquifers. The stable isotope composition indicates that the lower Kurnub sandstone aquifer was recharged over far-field Nubian Sandstone outcrops in the vicinity of the Precambrian basement outcrops of the Sinai Desert, which belongs to the Afro-Arabian dome. The water flows northward and rises into the Judea carbonate aquifer through deep faults. A similar hydrogeological system is inferred for the speleogenetic period of Ashalim Cave. Dewatering of the cave occurred in the Pliocene due to regional uplift. This is indicated by the first vadose speleothems, dated to the late Pliocene (3.1 Ma). This was followed by surface denudation, which breached the cave and formed the present entrance.

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Contents

Geological Society, London, Special Publications

Advances in Karst Research: Theory, Fieldwork and Applications
CONTAINS OPEN ACCESS

M. Parise
M. Parise
University Aldo Moro, Italy
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F. Gabrovsek
F. Gabrovsek
Karst Research Institute ZRC SAZU, Slovenia
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G. Kaufmann
G. Kaufmann
Freie Universität Berlin, Germany
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N. Ravbar
N. Ravbar
Karst Research Institute ZRC SAZU, Slovenia
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Geological Society of London
Volume
466
ISBN electronic:
9781786203786
Publication date:
January 01, 2018

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