Geochemistry, SiO2 minerals and isotopes at DSDP Hole 72-516F
| Cobertura |
LATITUDE: -30.276500 * LONGITUDE: -35.285000 * DATE/TIME START: 1980-03-11T00:00:00 * DATE/TIME END: 1980-03-11T00:00:00 |
|---|---|
| Data(s) |
07/05/1983
|
| Resumo |
Cherts recovered during DSDP Leg 72 from Rio Grande Rise sediments (Site 516) consist of both cristobalite and quartz, and contain ghosts of foraminifers and (more rare) radiolarians. Porcelanite made of disordered cristobalite is found in most old enclosing sediments. Local dissolution of siliceous microfossils during diagenesis is the most likely source of the silica required for the chert formation. As sediment age increases, the proportion of biogenic silica decreases and authigenic silica increases. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.811395 doi:10.1594/PANGAEA.811395 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Levitan, Mikhail A; Strizhov, Valentin P; Shevchenko, Alla Ya (1983): Cherts from the Rio Grande Rise sediments, Deep Sea Drilling Project Leg 72, Hole 516F. In: Barker, PF; Carlson, RL; Johnson, DA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 72, 443-447, doi:10.2973/dsdp.proc.72.113.1983 |
| Palavras-Chave | #72-516F; Al2O3; Aluminium oxide; Calcium oxide; CaO; Carbon dioxide; CO2; d13C carb; d18O carb; Deep Sea Drilling Project; delta 13C, carbonate; delta 18O, carbonate; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Epoch; Fe2O3; Glomar Challenger; Iron oxide, Fe2O3; K2O; Label; Leg72; LOI; Loss on ignition; Magnesium oxide; Manganese oxide; mbsf; MgO; MnO; Na2O; No; Number; ODP sample designation; Opal-A/opal-CT ratio; Opal-A (peak height); Opal-A peak height; Opal-CT (peak height); Opal-CT peak height; Potassium oxide; Quartz/opal-CT ratio; Quartz (peak height); Qz peak height; Ratio; Sample code/label; see reference(s); Silicon dioxide; SiO2; Sodium oxide; South Atlantic/CONT RISE; TiO2; Titanium oxide; Total; Unit is mm; 3.33 Å; Unit is mm; 4.08-4.11 Å; Unit is mm; halo 6-16° 2-theta; X-ray diffraction (XRD); X-ray fluorescence (XRF) |
| Tipo |
Dataset |
