Publication Date:
2023-07-10
Description:
Atomic-absorption spectrophotometry and instrumental neutron activation analysis were used to determine concentrations of SiO2, Al2O3, FeOt, MgO, CaO, Na2O, K2O, MnO, La, Ce, Sm, Eu, Tb, Yb, Lu, Sc, Co, Cr, Th, Hf, and Ta for 14 basalt samples from the lower portion of Hole 462A in the Nauru Basin. The basalts are similar to normal midocean ridge basalt (MORB) for the elements analyzed, and light rare-earth elements (LREE) are depleted relative to heavy rare-earth elements (HREE). Two samples are extensively altered to smectites and show significant reductions in Al2O3, CaO, MnO, Na2O, REE, Sc, Co, and Hf and gains in MgO and FeOt relative to unaltered samples. The increase in MgO and decrease in CaO indicate that alteration was caused by hydrothermal solutions.
Keywords:
61-462A; Aluminium oxide; Atomic absorption spectrometry (AAS); Calcium oxide; Cerium; Chromium; Cobalt; Deep Sea Drilling Project; Description; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Europium; Glomar Challenger; Hafnium; Instrumental neutron activation analysis (INAA); Iron oxide, FeO; Lanthanum; Leg61; Lutetium; Magnesium oxide; Manganese oxide; Potassium oxide; Samarium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; Tantalum; Terbium; Thorium; Ytterbium
Type:
Dataset
Format:
text/tab-separated-values, 317 data points
