Nguo Sylvestre Kanouo
Faculty of Mines and Petroleum Industries,
46 Maroua
Cameroon
Review Article
U-Pb Zircon Age: Preliminary Data Evaluating the Earth History Recorded by Two Basement Rocks (Granitic Pegmatite and Mica-Schist) in Mamfe Basin (Sw Cameroon, Central Africa)
Author(s): Nguo Sylvestre KanouoNguo Sylvestre Kanouo
Zircon crystals from two basement rocks (granitic pegmatite and mica-schist) in the Mamfe Basin were studied to provide petrogenetic and geochronologic constraints, therefore were characterized and dated by LA-Q-ICP-MS analytical techniques, after their internal textural features were determined. Zircon crystals with oscillatory zoning from the granitic pegmatite exceed 200 μm are mainly euhedral to prismatic. The U (≤ 169 ppm), Th (≤ 240 ppm), and Th/U (0.6-1.7) are within the range of zircon crystallized in crustal magmatic environment. The 206Pb/238U ages (506 ± 11 to 639 ± 25 Ma) and 207Pb/235U (490 ± 13 to 653 ± 29 Ma) date Early Precambrian (Early Neoproterozoic: Edicaran) to Cambrian event. They are close to the age of rocks crystallized during the Pan-African collision found within the Cameroon Mo.. View More»
