STUDY OF SILICEOUS KARST GENESIS IN EASTERN NIGER - MICROSCOPY AND X-RAY-MICROANALYSIS OF SPELEOTHEMS

Authors
WILLEMS L COMPERE P SPONHOLZ B
Citation
L. Willems et al., STUDY OF SILICEOUS KARST GENESIS IN EASTERN NIGER - MICROSCOPY AND X-RAY-MICROANALYSIS OF SPELEOTHEMS, Zeitschrift fur Geomorphologie, 42(2), 1998, pp. 129-142
Citations number
10
Categorie Soggetti
Geografhy,"Geosciences, Interdisciplinary
Journal title
Zeitschrift fur Geomorphologie → ACNP
ISSN journal
03728854
Volume
42
Issue
2
Year of publication
1998
Pages
129 - 142
Database
ISI
SICI code
0372-8854(1998)42:2<129:SOSKGI>2.0.ZU;2-B
Abstract
Light microscopic, scanning electron microscopic and elemental X-ray m icroanalytical observations of ferrous cave concretions from north-eas t of Tchigai mountains (Niger) permitted the characterisation of the g enesis conditions of karstification in this region. The speleothems sh ow at least two phases marking the drying of an aquifer, in relation w ith the present landscape shaping. A significant mobilisation of Si co nfirms the ferro-siliceous nature of the karst in this part of Niger.