Browsing Faculty of Natural Sciences by Author "Frei, D"
Now showing items 1-7 of 7
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Dating detrital zircon from the gold-bearing Ventersdorp contact reef in the Ventersdorp supergroup of South Africa
Frei, D; Cornell, D.H; Meintjes, P.G (Elsevier, 2021)The Ventersdorp Contact Reef (VCR) at the base of the >4.5 km-thick volcanosedimentary Ventersdorp Supergroup unconformably overlies the Witwatersrand Supergroup and is the second youngest mineable reef in the Witwatersrand ... -
Depositional age and provenance of high-grade paragneisses from the Mérida Andes, Venezuela: Implications for the Ediacaran–Cambrian tectonic setting of northwestern Gondwana
Tazzo-Rangel, MD; Weber, B; Frei, D; González-Guzmán, R (Elsevier, 2021)Isotopic, geochemical, and geochronological data are provided to constrain sedimentary sources and depositional ages of high-grade paragneisses of the Iglesias Complex in the Mérida Andes (Venezuela). U-Pb geochronology ... -
Lithostratigraphy of the Mesoproterozoic Twakputs Gneiss
Doggart, S; Macey, P; Frei, D (Bureau for Scientific Publications, 2021)The Twakputs Gneiss is a garnetiferous, K-feldspar megacrystic, biotite granite-granodiorite orthogneiss. It represents a major unit in the Kakamas Domain of the Mesoproterozoic Namaqua-Natal Metamorphic Province extending ... -
Lithostratigraphy of the Naros Granite (Komsberg Suite), South Africa and Namibia
Thomas, R; Macey, P; Frei, D (Bureau for Scientific Publications, 2021)The Naros Granite occurs as a large, northwest-trending ovoid batholith roughly 30 km long and 15 km wide straddling the Orange River border between South Africa and Namibia, 25 km northeast of Onseepkans. It consists ... -
Petrological, geochemical (major, trace, and rare earth elements), and U–Pb zircon data of the Tamatán Group, NE Mexico
Frei, D; Casas-Peña, J.M; Ramírez-Fernández, J.A (Elsevier, 2021)From samples of the Paleozoic Tamatán Group (Huizachal–Peregrina Anticlinorium, Tamaulipas, Mexico), petrographic (qualitative and modal) and geochemical analyses (major, trace, and rare earth elements) were conducted. The ... -
Provenance and tectonic setting of the Paleozoic Tamatán Group, NE Mexico: Implications for the closure of the Rheic Ocean
Frei, D; Casas-Pena, J.M; Ramirez-Fernandez, J.A (Elsevier, 2021)The Huizachal–Peregrina Anticlinorium in northeastern Mexico comprises a wide variety of Precambrian and Paleozoic basement units. In this work, Silurian-to-Permian unmetamorphosed siliciclastic successions (i.e., Cañón ... -
Provenance of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U–Pb detrital zircon geochronology, Hf and Nd model ages, and geochemical data
Frei, D; Oyhantçabal, P; Oriolo, S (Elsevier, 2021)New isotopic and geochemical data for the Paleo- Meso- and Neoproterozoic metasedimentary cover of the southern Dom Feliciano Belt (Brasiliano/Pan-African) are presented and evaluated combined with published information. ...