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The original igneous pyroxene of cumulate eucrites was pigeonite, which has subsequently undergone subsolidus exsolution of augite and, in some cases, inversion to orthopyroxene, with additional augite exsolution. Hess and Henderson (1949) determined that original pigeonite in Moore County had only partially inverted to orthopyroxene: They described four pyroxenes in Moore County; low-Ca pigeonite developed from the original igneous pigeonite by exsolution of coarse lamellae of augite, and hypersthene developed from the low-Ca pigeonite through inversion and exsolution of fine lamellae of pyroxene phases. Harlow et al. (1979) found that the original igneous pigeonite in Serra de Mage had inverted to hypersthene, with development of four types of augite exsolution during the subsolidus cooling history. Similarly, in Moama the original igneous pigeonite has exsolved augite and inverted to hypersthene (Lovering 1975a Takeda et al. 1976). Binda is the most magnesian of the cumulate eucrites, and the only one classified by Delaney et al. (1984) as an orthopyroxene-cumulate eucrite. Takeda al. (1976) have shown that the original pyroxene in Binda was a low-Ca pigeonite that exsolved augite and inverted to hypersthene. Table 30 gives representative pyroxene analyses for selected cumulate eucrites, and estimated primary pigeonite compositions are plotted in Figure 42. As is the case for all HED meteorites, plagioclase in cumulate eucrites is calcic is on average more calcic than that in basaltic eucrites. Basaltic eucrite plagioclase has compositions in the range of bytownite to anorthite, while in cumulate eucrites the plagioclase is anorthite, An91-95;. A-881394 contains unusually calcic plagioclase, An,, {Takeda et al. 1997b). The K2O contents of cumulate eucrite plagioclases are very low typically <0.1 wt %.

The blue-metallic ilmenite occurs as small grains in most cumulate eucrites . Only in Moama ilmenite could not be found (Delaney et al. ,1984).

The composition of metal in the cumulate eucrites Binda, Moama, Moore County has received only cursory study (Duke 1965, Lovering 1964, 1975).

Based on modal abundances (Delaney et al 1984) cumulate eucrites can be divided into 2 subgroups:

a) feldspathic cumulate eucrites

b) orthopyroxene cumulate eucrites

There is a small but reasonable  possibility that  this meteorite might have originated Mercury

Anom. Eucrite with Mesosiderite tendency Dho 007

Black impact melt veins and pockets are abundant.

   Thermal history: Metal phases underwent a very slow cooling! (Yamaguchi et al)

This rare type is a cumulate eucrite, - a monomict breccia derived from a magmaticrock having a gabbroic texture consisting of subhedral grains of pyroxene

and plagioclase. Accessory minerals include metal, troilite, and chromite.

Dho 007 has a variety of glass inclusions (approximately up to 10 microns in diameter) contained in plagioclase  and pyroxene  grains as well as in the form a homogeneous melt. Gas bubbles formed from shrinkage during cooling can be found in the glass. The glass inclusions occur generally in round shape.

 Highly-silicic glass inclusions in Dho 007 and diogenites

orthopyroxenite. For Dhofar 007, formation of the inclusions in host plagioclase

from a late stage residual melt on the parent body. 

The occurrence of these secondary glass inclusions, outlining healed fractures in a single crystal, suggests migration of melts

Ref.: Kouhei Kitazato+ and Masanori Kurosawa

0,2g sold; 1.2g slice sold; 1.231g slice 24x21mm $160; 3.67g endpiece with crust $430;

mostly with fresh sparling black crust