@article{fdi:010044187, title = {{L}ate {Q}uaternary history of the {N}oumea lagoon ({N}ew {C}aledonia, {S}outh {W}est {P}acific) as depicted by seismic stratigraphy and multibeam bathymetry {A} modern model of tropical rimmed shelf}, author = {{L}e {R}oy, {P}. and {C}abioch, {G}uy and {M}onod, {B}. and {L}agabrielle, {Y}. and {P}elletier, {B}ernard and {F}lamand, {B}.}, editor = {}, language = {{ENG}}, abstract = {{T}he barrier reef tract of {N}ew {C}aledonia is the second largest in the world enclosing lagoons of variable width. {T}he {L}ate {Q}uaternary evolution of these barrier reefs and lagoons is poorly known. {A} recent high resolution seismic and multibeam bathymetry survey was carried out in the south-western lagoon from shoreline to open ocean across the barrier reef pass systems to perform sequence stratigraphy and to better understand the {Q}uaternary evolution of the lagoon. {T}wo depositional sequences bounded by type-1 erosional surfaces can be identified. {T}he bounding surfaces delineate the bottom of two generations of incised valleys. {S}ystem tracts comprising a complete succession of regressive, lowstand, transgressive and highstand tracts were observed only in the upper sequence. {C}hronostratigraphic and sedimentological interpretations of the seismic data are based on correlations with the chronology defined in the nearby cores drilled through the reefs and in the gravity cores previously recovered in the inner lagoon. {I}nterpretation of seismic data is also carried out on the basis of correlation with multibeam bathymetric data. {O}ur results indicate that the history of the {N}ew {C}aledonian lagoon probably does not exceed 200ka marked by two or three brief episodes each of immersion of about ten thousand years. {T}he bathymetric data reveal that during successive low sea level stands, the lagoon was dependent upon erosional fluvial networks. {T}he deep fluvial valleys were connected to the continental slope through the passes. {S}eismic records reveal that upstream palaeo-channels are not connected to the modern coastal rivers. {I}n contrast, many aggrading deposits, including numerous stacking channels, and extending across the proximal part of the outer lagoon. can be identified. {E}xamination of drainage network morphology suggests a progressive tilt of the outer lagoon. {S}uch evolution reveals that the {N}oumea lagoon which is one of the widest in the world is an exceptional modern example of a rimmed shelf providing data to analyze the past counterparts.}, keywords = {{N}ew {C}aledonia ; {L}agoon ; {S}eismic and sequence stratigraphy ; {I}ncised ; valleys ; {C}arbonate platform}, booktitle = {}, journal = {{P}alaeogeography {P}alaeoclimatology {P}alaeoecology}, volume = {270}, numero = {1-2}, pages = {29--45}, ISSN = {0031-0182}, year = {2008}, DOI = {10.1016/j.palaeo.2008.08.012}, URL = {https://www.documentation.ird.fr/hor/fdi:010044187}, }