Clay mineralogy of ODP Leg 103 sites (Table 1)

• Main Authors: Meyer, Audrey W, Davies, Thomas A
• Format: Dataset
• Language: English
• Published: PANGAEA 1988
• Subjects: 103-637A; 103-638B; 103-638C; 103-639A; 103-639B; 103-639C; 103-639D; 103-640A; 103-641A; 103-641C; Chlorite; Chlorite (peak height); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Illite; Illite (peak area); Joides Resolution; Kaolinite; Kaolinite (peak height); Kaolinite+Chlorite; Kaolinite+Chlorite (peak area); Leg103; North Atlantic Ocean; Ocean Drilling Program; ODP; Palygorskite; Palygorskite (peak area); Sample code/label; Sepiolite; Sepiolite (peak area); Smectite; Smectite (peak area); Sum; X-ray diffraction (XRD); North Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.743991; https://doi.org/10.1594/PANGAEA.743991

Samples from Cenozoic and Mesozoic sediments drilled during ODP Leg 103 were analyzed for clay mineralogy. Kaolinite, chlorite, illite, and smectite occur in most of the samples studied; palygorskite and sepiolite occur principally in Paleogene and Eocene brown clays. In general, throughout the section deposited in the syn- and post-rift period, the more calcareous-rich pelagic sediments contain greater amounts of smectite and lesser amounts of kaolinite and chlorite than do the calcareous-poor terrigenous sediments. The clay data presented here also lend support to the general paleoenvironmental interpretation of a relatively warm climate throughout the Cretaceous and early Tertiary and a relatively cooler climate from the Oligocene to the present day.