%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Audra, P.
%A Cazes, G.
%A Robert, Xavier
%A Barriquand, L.
%A Dublyansky, Y.
%A Koltai, G.
%A Temovski, M.
%A Polyak, V.
%A Carbone, C.
%A Heresanu, V.
%A Gruat, J.P.
%A De Waele, J.
%T Speleogenesis of Gap-Gotan (Cupp-Coutunn) cave system, Köýtendag massif, Turkmenistan
%S Proceedings : Volume II
%C Belo Horizonte
%D 2025
%E Calux, A.
%L fdi:010096584
%G ENG
%I SBE
%K TURKMENISTAN
%K CUPP COUTUNN ; KOYTENDAG MASSIF ; LEBAP PROVINCE
%P 134-139
%U https://www.documentation.ird.fr/hor/fdi:010096584
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2026-03/010096584.pdf
%W Horizon (IRD)
%X The Gap-Gotan (Cupp-Coutunn) system (Turkmenistan) is known for its mineralogical wealth, thanks to the considerable work carried out by







Vladimir Maltsev in the 80s. However, following fieldwork carried out in 2024, Maltsev's speleogenetic hypotheses have been revised, in terms







of stages, chronology and processes. Several phases of speleogenesis can be identified. 1) Hydrothermal mineralizing fluids, leading to Pb-Zn







deposits in the vicinity, and impregnation of the host rock with sulfides, fluorite, and calcite veins. 2) The formation of large horizontal phreatic







conduits at shallow depth, fed by infiltration at high altitude, with dissolution produced by flows reacting with the sulfides in the host rock.







This process has been repeated in stages as the base level fell, until the present day. Nowadays similar active phreatic conduits are presumed







to exist beneath the gypsum collapses. 3) Once drained, the caves are decorated with gypsum speleothems mainly formed by sulfate-rich







seepage from the surface (e.g., chandeliers), and filled with fluvial sediments injected locally from canyon sinkholes. Mapping, isotopic and







mineralogical analyses, and U-series and U-Pb dating of the sediments are providing preliminary evidence for this model of speleogenesis in







these unique and exceptional caves.
%B International Congress of Speleology ; Congresso Brasileiro de Espeleologia
%8 2025/07/20-27
%$ 064SEDIM ; 064GEOREG ; 064GEOMOR ; 064PETRO