Mineral analyses were carried out on clinopyroxene and chromian spinel phenocrysts and chromian spinel phenocrysts and microphenocrysts. The clinopyroxenes are diopside and magnesian augite, with Mg# ranging from 0.77 to 0.86, and are compositionally comparable to intraplate tholeiitic and alkalic clinopyroxenes in non-orogenic basalt. Chromian spinels have Fe²⁺# , Cr# , and Fe³# that vary from 0.55 to 0.78, 0.57 to 0.68, and 0.12 to 0.21, respectively. Compositionally, The chromian spinels resemble those in Hawaiian tholeiites.

In terms of relatively immobile elements, the basaltic rocks are characterized by moderately high Tio₂ (2.1-2.8 wt.%), P₂O₅ (0.2-0.4 wt.%0, Zr (133-194 ppm), Nb (14-30 ppm) and Y (21-27 ppm), high Ni (445-864 ppm) and Cr (619-1404 ppm), and ratherunifrom Ti/Zr (92± 3), Zr/Nb (8± 1), and Zr/Y (6.6± 0.5) values. They have V contents that vary from 230 to 315 ppm, and Nb/Y ratios. (0.6-1.1) intermediate between tholeiitic and alkalic basalt. Their REE patterns have relatively flat LREE (La/Sm)cn = 1.34-1.55) with HREE depletion ((Sm/Yb)cn = 3.21-3.61). The N-MORB normalized multi-element patterns for the analyzed samples are step-like, similar to those for intra-plate basalt. The REE and N-MORB normalized patterns are analogous to the patterns for tholeiites and transitional tholeiites from the Loihi Seamount in the Hawaiian-Emperor Chain. As a consequence, the study basaltic rocks are inferred to have tholeiitic affinities and to have erupted in an ocean-island environment. These oceanic intra-plate basalts might have formed as a chain of island or seamounts in either a major ocean basin or in mature backarc basin.