Pigmy Basin MD02-2553 Holocene Mineralogical and Geochemical Data Montero-Serrano, J.C.; Bout-Roumazeilles, V.; Sionneau, T.; Tribovillard, N.; Bory, A.; Flower, B.P.; Riboulleau, A.; Martinez, P.; Billy, I. Montero-Serrano, J.C. Bout-Roumazeilles, V. Sionneau, T. Tribovillard, N. Bory, A. Flower, B.P. Riboulleau, A. Martinez, P. Billy, I. earth science/paleoclimate/paleoceanography (manganese,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (potassium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (titanium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (gadolinium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (dysprosium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (chromium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (uranium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (titanium,sediment,null,count per 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science/paleoclimate/paleoceanography (terbium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (thorium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (smectite,sediment,null,percent,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (mineral index,sediment,null,dimensionless,null,paleoceanography,null,null,N,smectite/(illite plus chlorite)) earth science/paleoclimate/paleoceanography (calcium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (aluminum,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (yttrium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (phosphorus,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (barium,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (zinc,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (copper,sediment,null,parts per million,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean (MD02-2553>LATITUDE 27.1835>LONGITUDE -91.4167) Changes in terrigenous-transfer patterns from North America toward the Gulf of Mexico via the Mississippi River during the Holocene were investigated using mineralogical and geochemical records from the northern Gulf of Mexico (Pigmy Basin). Clay mineralogy (smectite/ illite+chlorite) and geochemical signatures (K and Ti intensities) indicate fluctuations in the detrital sedimentation during the Holocene in the Pigmy Basin. They likely reflect alternations between at least two dominant terrigenous sources: the smectite-rich NW Mississippi watershed, and the illite- and chlorite-rich Great Lakes province and NE Mississippi watershed. These recurring and rapid modifications of erosional processes over this period suggest changes in the hydrological regime via rainfall patterns. Such a modification during the Holocene is likely linked with the rapid atmospheric reorganization following the final collapse of the Laurentide Ice Sheet. Indeed, mineralogical and geochemical proxies indicate east-to-west migrations of the main detrital source (from the Great Lakes and north-eastern province toward the north-western province) associated with Mississippi River megaflood episodes. These modifications of the main detrital sources likely record migrations of the precipitation belt, which are constrained by atmospheric configuration (Jet Stream, Bermuda High and Intertropical Convergence Zone position) and subtropical oceanic hydrological properties (meridional extension of the Atlantic Warm Pool).In the frame of previously published rainfall patterns over the Caribbean and North America, our results highlight some marked modifications of moisture transfer throughout the Holocene. These changes are interpreted as resulting from two atmospheric configurations that have driven alternately the precipitation distribution over North America for the last 10 ka with an apparent cyclicity of ~2.5 ka. The coherent common cyclicity between Gulf of Mexico detrital parameters and Greenland atmospheric proxies over the Holocene suggests that the initial external forcing was rapidly transferred latitudinally through atmospheric processes. STUDY NOTES: High-resolution Holocene mineralogical and geochemical data from core MD02-2553, Pigmy Basin, northern Gulf of Mexico, analyzed for Holocene sediment sourcing in the Mississippi River drainage. The Holocene section of the core MD02-2553 (the upper 359 cm) was studied at high resolution (average sample resolution of ~47 yr) for clay mineralogy and grain size. Inorganic geochemistry was studied for some major elements (K and Ti) at 1 cm resolution (average sample resolution of ~28 yr) using the XRF core scanner. Complementarily, trace and rare earth element (REE) concentrations were determined at lower resolutions, with average sample resolution of 555 yr. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Montero-Serrano, J.C. Investigator : Bout-Roumazeilles, V. Investigator : Sionneau, T. Investigator : Tribovillard, N. Investigator : Bory, A. Investigator : Flower, B.P. Investigator : Riboulleau, A. Investigator : Martinez, P. Investigator : Billy, I. 2010-09-27 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10417 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.xls English https://www.ncdc.noaa.gov/paleo/study/10417 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/montero-serrano2010/montero-serrano2010.xls Montero-Serrano, J.C., V. Bout-Roumazeilles, T. Sionneau, N. Tribovillard, A. Bory, B. Flower, A. Riboulleau, P. Martinez, and I. Billy. 2010. Changes in precipitation regimes over North America during the Holocene as recorded by mineralogy and geochemistry of Gulf of Mexico sediments. Global and Planetary Change, doi: 10.1016/j.gloplacha.2010.09.004. START YEAR: 9990 cal yr BP * END YEAR: 140 cal yr BP -91.4167 27.1835 -91.4167 27.1835