These rocks are oceanic tholeiites and alkali olivine basalts. Secondary alteration seems to be hydrothermal rather than halmyrolytic. -K.A.R.
CITATION STYLE
Grechin, V. I., Eroshchev-Shak, V. A., & Zolotarev, B. P. (1981). Petrochemistry of abyssal oceanic basalts and dolerites, and their secondary alterations, sites 469, 470, 471, 472, 473. Initial Reports of the D.S.D.P., 63. https://doi.org/10.2973/dsdp.proc.63.127.1981
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