@article{fdi:010088306,
  title = {{A}ctive thrust tectonics along the western slope of the {C}entral {A}ndes southernmost {P}ampean flat-slab segment (-33 deg. {S}, {C}hile) : {T}he {C}arino {B}otado fault system},
  author = {{E}stay, {J}. and {P}into, {L}. and {E}aston, {G}. and {D}e {P}ascale, {G}. {P}. and {T}roncoso, {M}. and {C}arretier, {S}{\'e}bastien and {F}orman, {S}. {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}long the western slope of the {C}entral {A}ndes in the southernmost part of the {P}ampean flat-slab subduction zone segment (-33 & {DEG};{S}), crustal {Q}uaternary west-vergent reverse faults are found, but little is known about them. {T}o better understand and characterize these faults, grouped as the {C}arin & {SIM};o {B}otado thrust fault system ({CBF}), we undertook a multidisciplinary study focused on remote sensing and field geomorphic and geologic mapping, sedimentary relationships, and fault characterization. {O}ptically {S}timulated {L}uminescence ({OSL}) and {U}-{P}b dating samples were obtained from faulted deposits to constrain the timing of fault motion. {W}e combined the mapping, fault relationship descriptions, and age control to understand this system better and quantify tectonic rates here for the first time. {T}he main {CBF} is best expressed with {L}ate-{C}enozoic hanging wall fault rocks over thrusting {Q}uaternary coarse-grained alluvial fan deposits, and the fault zone is found over a large area and with an altered fault zone (-0.5-2 km wide). {T}he principal reverse fault segment of the {CBF} is well exposed in creeks, with an average dip of 40 & {DEG};{E} and an associated vertical throw (up to the east) of the hanging wall from-3.2 m up to-30 m. {F}ive {OSL} samples, taken from tilted and untilted alluvial fan deposits adjacent to the {CBF}'s main fault, yielded ages between 2.5 & {PLUSMN}; 0.2 ka and 9.0 & {PLUSMN}; 0.7 ka, supporting {H}olocene activity and-4.9 m of fault slip in the last-8.7 ka. {N}inety-nine detrital zircons from fluvial terrace deposits in the study area were dated using {U}-{P}b {ICPMS}, giving mainly {O}ligo-{M}iocene ages. {T}he youngest ages of detrital zircons are {Q}uaternary (n = 3;-0.9-4.4 {M}a), which indicates that {CBF} activity could have started as early as-0.9 {M}a producing an accumulated hanging wall uplift of-130 m. {T}he alignment of the fault profiles, creek and river knickpoints, and alluvial and fluvial deposits allows the most recent activity of the main {CBF} to be traced between 5 km and up to 15 km along the fault trace. {B}ased on fault length, slip characteristics, and earthquake scaling relationships, earthquakes up to {M}w 7.5 could be associated with the fault. {B}ecause of the clear relationship between the river incision, distri-bution of fluvial terraces, variation in sinuosity and stream power, and the location of the faults, we suggest that the tectonic uplift controls the hanging wall fluvial incision from-0.9 {M}a to the present. {T}he {Q}uaternary (at least 0.9 {M}a to present) active {CBF} shares geometric, structural, and rupture timing similarities with the nearby better-characterized {S}an {R}am & {PRIME};on {F}ault system. {T}he latter is located-50 km to the south along the eastern border of {S}antiago, the capital city of {C}hile. {B}oth fault systems share a comparable morpho-structural setting with a consistent average {N}-{S} trend. {S}ignificant seismic hazard is associated with both the {CBF} and the {S}an {R}amon {S}ystem, which may be linked structurally and temporally regarding previous surface ruptures and major earthquakes, and therefore remain important research targets.},
  keywords = {{A}ndean flat -slab ; {R}everse fault ; {Q}uaternary activity ; {S}eismic hazard ; {CHILI} ; {ANDES}},
  booktitle = {},
  journal = {{G}eomorphology},
  volume = {437},
  numero = {},
  pages = {108801 [20 p.]},
  ISSN = {0169-555{X}},
  year = {2023},
  DOI = {10.1016/j.geomorph.2023.108801},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088306},
}