@article{fdi:010066068,
  title = {{T}ectonic evolution of the {G}aoua region, {B}urkina {F}aso : implications for mineralization},
  author = {{B}aratoux, {L}enka and {M}etelka, {V}. and {N}aba, {S}. and {O}uiya, {P}. and {S}iebenaller, {L}uc and {J}essell, {M}ark and {N}are, {A}. and {S}alvi, {S}. and {B}eziat, {D}. and {F}ranceschi, {G}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he interpretation of high-resolution airborne geophysical data integrated with field structural and lithological observations were employed in the creation of a litho-structural framework for the {G}aoua region, {B}urkina {F}aso. {T}he granite-greenstone domain of {P}aleoproterozoic age was affected by multiple deformation and mineralization events. {T}he early tectonic phase is characterized by the emplacement of voluminous tholeiitic and calc-alkaline lavas, probably in a volcanic arc setting. {T}he copper mineralization in {G}ongondy, {D}ienemera and {M}t {B}iri is concentrated in a diorite/andesite breccia, and is interpreted as porphyry-copper style formed at an early stage of the evolution of the area. {E}vidence for the first deformation event {D}1({G}a) corresponding to {N}-{S} shortening was only found in the {E}-{W} trending mafic unit bordering the {G}aoua batholith to the south. {A} second deformation phase {D}2({G}a) occurred under greenschist facies conditions and lead to a development of more or less penetrative metamorphic foliation and its subsequent folding under overall {E}-{W} compression. {A}t later stages, the {D}2({G}a) switched to a transcurrent regime characterized by intense {N}-{S} to {NW}-trending steeply dipping shear zones. {T}he first significant gold mineralization event is related to this transcurrent tectonic phase. {D}uring subsequent {D}3({G}a), intense network of brittle to brittle ductile {NW} and {NE} faults developed. {E}conomic gold concentrations are attributed to the {D}3({G}a) event and are associated with the remobilization of early disseminated low grade gold concentrations. {S}ignificant deposits in the area are {N}assara, {G}omblora, {B}atie {W}est and {K}ampti. {T}he last deformation event {D}4({G}a) resulted in {E}-{W} trending thrust faults and crenulation cleavage planes, under overall {N}-{S} compression. {N}o mineralization events related to this stage have been seen.},
  keywords = {{W}est {A}frican {C}raton ; {B}urkina {F}aso ; {P}aleoproterozoic ; {T}ectonics ; {P}orphyry ; copper deposit ; {O}rogenic gold deposit ; {BURKINA} {FASO}},
  booktitle = {{T}ectonics, mineralisation and regolith evolution of the {W}est {A}frican {C}raton},
  journal = {{J}ournal of {A}frican {E}arth {S}ciences},
  volume = {112, part {B}},
  numero = {{N}o sp{\'e}cial},
  pages = {419--439},
  ISSN = {1464-343{X}},
  year = {2015},
  DOI = {10.1016/j.jafrearsci.2015.10.004},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066068},
}