@inproceedings{fdi:010096584, title = {{S}peleogenesis of {G}ap-{G}otan ({C}upp-{C}outunn) cave system, {K}{\¨o}ýtendag massif, {T}urkmenistan}, author = {{A}udra, {P}. and {C}azes, {G}. and {R}obert, {X}avier and {B}arriquand, {L}. and {D}ublyansky, {Y}. and {K}oltai, {G}. and {T}emovski, {M}. and {P}olyak, {V}. and {C}arbone, {C}. and {H}eresanu, {V}. and {G}ruat, {J}.{P}. and {D}e {W}aele, {J}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {G}ap-{G}otan ({C}upp-{C}outunn) system ({T}urkmenistan) is known for its mineralogical wealth, thanks to the considerable work carried out by {V}ladimir {M}altsev in the 80s. {H}owever, following fieldwork carried out in 2024, {M}altsev's speleogenetic hypotheses have been revised, in terms of stages, chronology and processes. {S}everal phases of speleogenesis can be identified. 1) {H}ydrothermal mineralizing fluids, leading to {P}b-{Z}n deposits in the vicinity, and impregnation of the host rock with sulfides, fluorite, and calcite veins. 2) {T}he 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. {T}his process has been repeated in stages as the base level fell, until the present day. {N}owadays similar active phreatic conduits are presumed to exist beneath the gypsum collapses. 3) {O}nce 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. {M}apping, isotopic and mineralogical analyses, and {U}-series and {U}-{P}b dating of the sediments are providing preliminary evidence for this model of speleogenesis in these unique and exceptional caves.}, keywords = {{TURKMENISTAN} ; {CUPP} {COUTUNN} ; {KOYTENDAG} {MASSIF} ; {LEBAP} {PROVINCE}}, numero = {}, pages = {134--139}, booktitle = {{P}roceedings : {V}olume {II}}, year = {2025}, URL = {https://www.documentation.ird.fr/hor/fdi:010096584}, }