@article{fdi:010081542,
  title = {{N}ew constraints on the origin of the {S}ierra {M}adre de {C}hiapas (south {M}exico) from sediment provenance and apatite thermochronometry},
  author = {{W}itt, {C}. and {B}richau, {S}t{\'e}phanie and {C}arter, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he timing and source of deformation responsible for formation of the {S}ierra {M}adre de {C}hiapas (south {M}exico) are unclear. {T}o address this, apatite fission track and {U}-{T}h-{H}e thermochronometry, combined with zircon {U}-{P}b dating, were performed on bedrock and sedimentary samples of the {S}ierra {M}adre de {C}hiapas to discern timing of exhumation and identify sediment source areas. {T}he {U}-{P}b results show that {P}aleocene-{E}ocene terrigenous units outcropping at the northern section of the {S}ierra were mostly derived from {G}renville (similar to 1 {G}a) basement whereas the internal sections of the chain yield mainly {P}ermian to {T}riassic ages (circa 270-230 {M}a) typical of the {C}hiapas massif complex. {G}renville-sourced sediments are most probably sourced by the {O}axacan block or the {G}uichicovi complex and were deposited to the north of the {S}ierra in a foreland setting related to a {L}aramide deformation front. {O}ther possibly source areas may be related to metasedimentary units widely documented at the south {M}aya block such as the {B}aldi unit. {T}he apatite fission track and {U}-{T}h-{H}e data combined with previously published results record three main stages in exhumation history: (1) slow exhumation between 35 and 25 {M}a affecting mainly the {C}hiapas massif complex; (2) fast exhumation between 16 and 9 {M}a related to the onset of major strike-slip deformation affecting both the {C}hiapas massif complex and {C}hiapas fold-and-thrust belt; and (3) a 6 to 5 {M}a period of rapid cooling that affected the {C}hiapas fold-and-thrust belt, coincident with the landward migration of the {C}aribbean-{N}orth {A}merica plate boundaries. {T}hese data suggest that most of the topographic growth of the {S}ierra {M}adre de {C}hiapas took place in the middle to late {M}iocene. {T}he new thermochronological evidence combined with stratigraphic and kinematic information suggests that the left-lateral strike-slip faults bounding the {C}hiapas fold-and-thrust belt to the west may have accommodated most of the displacement between the {N}orth {A}merican and {C}aribbean plates during the last 6-5 {M}a.},
  keywords = {},
  booktitle = {},
  journal = {{T}ectonics},
  volume = {31},
  numero = {},
  pages = {{TC}6001},
  ISSN = {0278-7407},
  year = {2012},
  DOI = {10.1029/2012tc003141},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081542},
}