@article{PAR00027402,
  title = {{P}rovenance of {D}evonian-{C}arboniferous sedimentary rocks of the {T}arija {B}asin, southern {B}olivia : implications for the geodynamic evolution of the southwestern margin of {G}ondwana},
  author = {{Z}avaleta, {A}. {G}. and {H}auser, {N}. and {R}oddaz, {M}. and {G}on{\c{c}}alves, {G}. {O}. and {G}onzález, {P}. {A}. and {B}aby, {P}atrice and {R}eimold, {W}. {U}. and {P}uma, {F}. and {B}ravo, {P}. and {H}umerez, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he western margin of {SW} {G}ondwana was a place of active convergence between the {G}ondwana shield and the oceanic lithosphere of the {P}anthalassa {O}cean during most of the {P}aleozoic. {H}owever, several studies have indicated that especially to the north of latitude 22(degrees){S}, the {D}evonian-early {C}arboniferous was a time of relative quiescence without magmatic activity, metamorphism, or deformation. {T}his interval has been termed the "{D}evonian {P}roblem." {A}s the {D}evonian-{C}arboniferous is extensively well represented by over 4000 -m -thick sedimentary sequences in the {T}arija {B}asin in the {S}outhern {B}olivian {S}ubandean {Z}one, provenance analyses-{U}-{P}b isotope analysis on detrital zircon, {S}r-{N}d whole -rock isotope analysis, and {X}-ray diffraction ({XRD})-were conducted on stratigraphically controlled sedimentary units to attempt to constrain the tectonic setting of the basin during that time. {U}-{P}b on zircon provenance analysis indicates that only the {C}arboniferous units show input from comparatively young sources (<14%), with ages between 420 {M}a and 320 {M}a, which can be correlated with a {D}evonian magmatic arc. {T}he dominant source areas for {D}evonian-{C}arboniferous sediment were the {S}ierras {P}ampeanas to the southwest and the {A}requipa-{A}ntofalla {M}assif and {F}amatinian {A}rc to the west, besides a few zircon grains (<18% of dates) that were possibly derived from pre -{A}ndean inliers with ages typically >1800 {M}a. {T}he combined {S}r-{N}d isotope and {XRD} results for the pelites and the multidimensional scaling ({MDS}) analysis indicate that the {C}arboniferous units most likely represent reworked material from older units, with a minor contribution from the western part of the basin. {A}ll currently available data lead us to propose that the {T}arija {B}asin developed during the {D}evonian-{C}arboniferous in a foreland basin setting related to the convergent margin, with important glacial sedimentary input from the continent during the {C}arboniferous. {T}he absence of a contribution from a concomitant magmatic arc for the {D}evonian units of the {T}arija {B}asin and the scarce magmatic zircon input (<14%) into the {C}arboniferous units indicate a shift from flat -slab subduction during the {D}evonian to normal subduction during the {C}arboniferous following complete delamination of the flat slab. {O}ur comparison of the detrital record for the {T}arija {B}asin with that of the {P}arana, {C}haco-{P}arana, {S}auce {G}rande, {P}aganzo, {N}avidad {A}rizaro, {M}adre de {D}ios, and {K}aroo basins supports an active margin setting for the {SW} margin of {G}ondwana during this time interval.},
  keywords = {{BOLIVIE} ; {ANDES} ; {GONDWANA}},
  booktitle = {},
  journal = {{G}eological {S}ociety of {A}merica {B}ulletin},
  volume = {136},
  numero = {3-4},
  pages = {1730--1752},
  ISSN = {0016-7606},
  year = {2024},
  DOI = {10.1130/b36701.1},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00027402},
}