Abstract The Twakputs Gneiss is a garnetiferous, K-feldspar megacrystic, biotite granite-granodiorite orthogneiss. It represents major unit in the Kakamas Domain of Mesoproterozoic Namaqua-Natal Metamorphic Province extending about 250 km between Riemvasmaak South Africa and Grünau southern Namibia. occurs as foliation-parallel, sheet-like bodies tightly infolded together with granulite-facies ...

Syenites are relatively rare within the Nigerian Basement Complex. As a result of their rarity, these rocks have been given less research attention over time and consequently poorly understood. The syenitic at Igarra were studied to ascertain tectonic evolution using geochemistry. Sampling was carried out survey-type geological field mapping approach. A total 10 samples collected for laboratory...

Abstract Origins of early Paleozoic metabasites (granulites and amphibolites) their host metasedimentary rocks in the Dunhuang block, NW China, are addressed by new geochronological geochemical data. The show back-arc basalt–like features, marked high Zr/Nb ratios Zr-Hf troughs, but they can be classified into two groups based on dissimilar protolith ages distinct Nd signatures. Most group I me...

China's Chang'e-5 (CE-5) mission, the first lunar sample return mission since 1976, landed at 43.06°N, 51.92°W on Dec. 1, 2020, in Northern Oceanus Procellarum. CE-5 targeted a mare plain (Em4/P58) composed of distinctive young (∼1.6-1.7 Ga) moderate-Ti basalts, with elevated Th abundance (inherent or extraneous). Thus, regolith and rock fragments sampled by come from some youngest basalts Moon...

Abstract The Qinling Orogen, located between the North and South China Blocks, records subduction-collisional orogeny along Paleozoic Shangdan Triassic Mianlue sutures, Mesozoic intracontinental orogenesis, which all played an important role in building present tectonic framework topography. strike-slip Shagou ductile shear zone that overprints suture Belts is crucial for understanding deformat...

Abstract The origin and evolution of subcontinental lithospheric mantle (SCLM) are important issues Earth’s chemical physical evolution. Here, we report detailed textural analyses on a xenolith suite from Befang (Oku Volcanic Group, Cameroon Line), which represents major tectono-magmatic structure the African plate. samples sourced spinel-facies dominated by lherzolites. Their texture is catacl...

Continental arc volcanism generates a wide diversity of magma compositions, but the tempos compositional variation are unclear. Here, we investigate 7-million year record volcanic ash layers in Cretaceous Eagle Ford Group, which was deposited Western Interior Seaway western North America. Low oxygen conditions prevented significant bioturbation, allowing for preservation hundreds thin form bent...

Abstract Late Paleozoic (Variscan) magmatism is widespread in Central Europe. The Lusatian Block located the NE Bohemian Massif and it part of Saxothuringian Zone Variscan orogen. It bordered by two major NW-trending shear zones, Intra-Sudetic Fault towards Elbe SW. scarce igneous rocks are situated close to these faults. We investigated 19 samples from plutonic volcanic Block, considering all ...