Research subject. Fe- and Al-rich metapelites of the Teya, Garevka Angara complexes North Yenisei Ridge (western margin Siberian craton) were studied. methods. Recently-obtained geochronologic (SHRIMP II U-Pb zircon dating) geochemical data on distribution major trace elements used to reproduce composition age protolith, along with paleofacies formation conditions. Results. The ferruginous-alum...

New mapping, geochronology, and geochemistry of the supracrustal enclave and associated orthogneisses at Akilia, West Greenland, support a >3825 6 Ma age for the sequence and a chemical sedimentary origin for the controversial Fe-rich quartz-pyroxene gneisses. Lithologies of the enclave comprise laterally continuous, mappable units of mafic amphibolite, ultramafic rocks, and two Fe-rich quartzp...

Introduction: Amoeboid olivine aggregates (AOA) are irregularly shaped inclusions found within all carbonaceous chondrites except CI [1,2]. Their bulk compositions are intermediate between those of anorthite-rich (Type C) calcium-aluminium rich inclusions and chondrules [2], and consist mostly of fine-grained olivine plus enclosed refractory nodules of spinel, pyroxene, feldspathoids, Fe-Ni met...

The garnet amphibolite schist is associated with the gabbroic unit of Mawat ophiolite, Kurdistan region, Northeast Iraq, in imbricated zone Zagros orogenic belt. Field observation, petrographic study, mineral chemistry, geochemical data, and thermodynamic modeling were used to demonstrate identification, predict observed stable assemblages, validate protolith. assemblages prograde are (pyrope-a...