(Table T1) Calcium carbonate content of sediments from ODP Leg 172 sites

• Main Authors: Giosan, Liviu, Flood, Roger D, Gruetzner, Jens, Franz, Sven-Oliver, Poli, Maria-Serena, Hagen, Sveinung
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: 172-1057B; 172-1061C; 172-1061D; 172-1062E; 172-1062F; 172-1063A; 172-1063B; Blake-Bahama Outer Ridge; North Atlantic Ocean; Blake Outer Ridge; Calcium carbonate; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Joides Resolution; Latitude of event; Leg172; Longitude of event; Ocean Drilling Program; ODP; Sample code/label; Spectrophotometer Minolta CM-2002; North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.787987; https://doi.org/10.1594/PANGAEA.787987

Visual-domain diffuse reflectance data collected aboard the JOIDES Resolution with the Minolta spectrometer CM-2002 during Ocean Drilling Program Leg 172 have been used to estimate successfully the carbonate content of sediments. Calibration equations were developed for each site and for each lithostratigraphic unit (or subunit at Site 1063) using multiple linear regression on raw as well as pretreated reflectance spectra (i.e., first-order derivation and squaring of raw reflectance spectra) for a total of 4141 direct carbonate measurements. The root-mean-square errors of 4% to 7% are within the range of previous estimates using diffuse reflectance data and are acceptable for the general extensive range of carbonate contents (i.e., 0-70 wt%) that characterize sedimentation at Leg 172 sites.