Ed. Mposkos et Dk. Kostopoulos, Diamond, former coesite and supersilicic garnet in metasedimentary rocks from the Greek Rhodope: a new ultrahigh-pressure metamorphic province established, EARTH PLAN, 192(4), 2001, pp. 497-506
We report here the first discovery of ultrahigh-pressure (UHP) indicator mi
nerals and textures from the Rhodope Metamorphic Province (RMP), northern G
reece, In particular, we document the exsolution of quartz, rutile and apat
ite in sodic garnet from metapelites (garnet-biotite-kyanite gneisses), whi
ch attests to the presence of a Si-Ti-Na-P-rich precursor garnet phase. Sim
ilar textures in garnet have been reported in the literature only once befo
re for eclogites from the Su Lu UHP metamorphic province, China. We also do
cument the presence of microdiamonds and multicrystalline quartz pseudomorp
hs after coesite, included in garnet from both eclogites and metapelites. W
e then argue that these rocks had once been transported to depths exceeding
220 kin, well into the upper mantle, thus establishing the RMP as another
important UHP metamorphic belt in the world. (C) 2001 Elsevier Science B.V.
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