Abstract
A study of low-temperature alteration effects on three samples of tholeiitic basalts dredged from the Gulf of California and a basalt sample drilled from the NE Pacific, has been described. The analysis of core-margin pairs for K, Rb, Cs, Ba and Sr contents does not always show the consistent mobility pattern reported earlier, namely, Cs > Rb > K > Ba > Sr and REE. Leaching experiments conducted on these samples show “normal” 87 Sr 86 Sr ratios as determined on the leached samples. When combined with the existing data, the 87 Sr 86 Sr ratio from the Gulf of California ranges from 0.70235 ± 5 to 0.70280 ± 6 (averaging ∼ 0.7025), implying that these rocks have been derived from a source similar to that of the “normal” ocean-ridge basalts.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call