Figure F10. Downhole mineral compositional variation showing the same pattern as in Figure F9, p. 26. The calculated compositions and liquidus temperatures of melts parental to the gabbroic rocks are also shown. Obviously, the bulk hole, in particular the lower kilometer, is rather evolved, as seen in Figure F2, p. 19, and discussed in the text. cpx = clinopyroxene, opx = orthopyroxene, An = anthorite, plag = plagioclase, Fo = fosterite, ol = olivine.

Figure F10. Downhole mineral compositional variation showing the same pattern as in Figure F9. The calculated compositions and liquidus temperatures of melts parental to the gabbroic rocks are also shown. Obviously, the bulk hole, in particular the lower kilometer, is rather evolved, as seen in Figure F2, and discussed in the text. cpx = clinopyroxene, opx = orthopyroxene, An = anthorite, plag = plagioclase, Fo = fosterite, ol = olivine.