Unknown
PANGAEA
In:
Supplement to: Mallinson, David; Flower, Benjamin P; Hine, Albert C; Brooks, Gregg R; Molina-Garza, Roberto S; Drexler, Tina M; ODP Leg 182 Shipboard Scientific Party (2003): Data report: Mineralogy and geochemistry of ODP Site 1128, Great Australian Bight. In: Hine, AC; Feary, DA; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 182, 1-17, https://doi.org/10.2973/odp.proc.sr.182.001.2003
Publication Date:
2024-01-09
Description:
This report presents mineralogic and geochemical data from Ocean Drilling Program Leg 182 Site 1128 in the Great Australian Bight. Clay mineralogy is dominated by mixed-layer illite-smectite, followed by minor amounts of kaolinite and illite, with intervals of pure smectite. Carbonate mineralogy is exclusively low-Mg calcite, except for one interval of dolomite in lower Oligocene sediments. Carbonate increases significantly in upper Eocene sediments, decreases through the lower Oligocene, then increases again in the Neogene. Quartz is present as a minor component that covaries inversely with carbonate. High-resolution sampling associated with Chron 13 normal (early Oligocene) reveals high-frequency (~23 k.y.) fluctuations in clay mineralogy and carbonate abundance and a positive oxygen and carbon isotope excursion (in bulk carbonates) related to Antarctic glaciation.
Keywords:
Ocean Drilling Program; ODP
Type:
Dataset
Format:
application/zip, 2 datasets
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