Results 11 to 20 of about 24,581 (234)

Synmetamorphic Cu remobilization during the Pan-African orogeny: Microstructural, petrological and geochronological data on the kyanite-micaschists hosting the Cu(–U) Lumwana deposit in the Western Zambian Copperbelt of the Lufilian belt [PDF]

Ore Geology Reviews, 2016
International audienceThe Pan-African Lufilian orogenic belt hosts world-class Cu deposits. In the Congolese Copperbelt (DRC), Cu(-Co) deposits, are mostly hosted within evaporitic and siliciclastic Neoproterozoic metasedimentary rocks (Mines Subgroup ...
F. Turlin, Aurélien Eglinger, O. Vanderhaeghe, A. André-Mayer, M. Poujol, J. Mercadier, R. Bartlett   +6 more
semanticscholar   +6 more sources

A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating [PDF]

Geologica Acta, 2006
The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, on the base of a U-Pb discordia upper intercept of 618 ± 9 Ma.
F. BEA, P. MONTERO, C. TALAVERA, T. ZINGER   +3 more
doaj   +7 more sources

Monazite U–Pb dating and 40Ar–39Ar thermochronology of metamorphic events in the Central African Copperbelt during the Pan-African Lufilian Orogeny

Journal of African Earth Sciences, 2005
Abstract New SHRIMP U–Pb age data on metamorphic monazite, as well as step-heating 40Ar–39Ar ages on metamorphic biotite, muscovite and microcline, from Katangan metasedimentary rocks of the Central African Copperbelt are presented. These rocks were deformed and metamorphosed during the Pan-African Lufilian Orogeny.
Rainaud, C., Master, S, Armstrong, Richard, Phillips, David, Robb, L   +4 more
openaire   +4 more sources

GEOLOGICAL INTERPRETATION OF LANDSAT IMAGERY OF NIGERIA’S HAWAL PRECAMBRIAN BASEMENT COMPLEX TERRAIN [PDF]

Geological Behavior, 2023
The Hawal Basement Complex is located in Nigeria’s NE region. Satellite imagery used in this study covers longitude 12º 00’ to 13º 30’E, and latitudes 9º 30’ to 11º 00’N.
Bassey Nsikak E., George Nyakno J.
doaj   +1 more source

Metallogenic characteristics of some localities of gold mineralization along shear zones of Elgaab, Dum el Tor and Sodri - Um Bader, (Sudan)

Bulletin of the Mineral Research and Exploration, 2021
Study area is located in the eastern sector of Saharan Meta - Craton that includes the western part of Bayuda Terrane and extend southwest to Sodri - Um Badir shear zones.
Mohamed Osman Elgızoulı, Badr El Din Khalil, Mohammed Y. Abedelgalıl   +2 more
doaj   +1 more source

Deep crustal structure of the Sergipano Belt, NE-Brazil, revealed by integrated modeling of gravimetric, magnetic, and geological data

Journal of the Geological Survey of Brazil, 2022
The Sergipano Belt is located in the Southern Subprovince of Borborema Province in the Northeast of Brazil. Its tectonic framework was consolidated in the Pan-African-Brasiliano Orogeny at the end of the Neoproterozoic. The most recent geological models
Roberto Gusmão de Oliveira, Nitzschia Regina Rodrigues Domingos, Walter Eugênio Medeiros   +2 more
doaj   +1 more source

The Cu–Pb–Zn-bearing veins of the Bou Skour deposit (Eastern Anti-Atlas, Morocco): structural control and tectonic evolution

Comptes Rendus. Géoscience, 2021
In the central Saghro massif of the Moroccan Anti-Atlas belt, the Bou Skour polymetallic deposit is hosted within mafic to felsic rocks of the Ediacaran Saghro Group and the lower Ouarzazate Group together with Pan-African plutons and dykes.
Aabi, Ayoub, Baidder, Lahssen, Hejja, Younes, El Azmi, Mohammed, Nait Bba, Abdellah, Otmane, Khadija   +5 more
doaj   +1 more source

Geochemistry, zircon U Pb ages and Hf isotopes of granites and pegmatites from Gubrunde region in the Eastern Nigeria Terrane: Insight into magmatism and tectonic evolution of the late Pan-African orogeny

Geochemistry, 2021
This study reports a new dataset of whole-rock geochemistry, biotite chemistry, in situ zircon U Pb geochronology and Hf isotope for a suite of granite and associated pegmatite samples from the Gubrunde region in the Eastern Nigeria Terrane (ENT ...
S. I. Bute, Xiaoyong Yang, Xueming Yang, M. Girei, A. Kayode, Yigan Lu   +5 more
semanticscholar   +1 more source

Structural and Petrographic Study of Crystalline Rocks in Part Of Oban Massif, SouthEastern Nigeria

Journal of Applied Sciences and Environmental Management, 2022
The study aims at differentiating lithologic units, general structural trends and orogenic implications of crystalline rocks within part of Oban Massif, Southeastern Nigeria.
G.E. Ubit, I.M. Ibanga, N.E. Bassey, I.J. Inim   +3 more
doaj   +1 more source

AFRP20: New P‐Wavespeed Model for the African Mantle Reveals Two Whole‐Mantle Plumes Below East Africa and Neoproterozoic Modification of the Tanzania Craton

Geochemistry, Geophysics, Geosystems, 2021
Africa's Cenozoic tectonism is often attributed to mantle plumes, particularly below East Africa, but their morphology, number, location, and impact on the African lithosphere are debated.
A. Boyce, I. D. Bastow, S. Cottaar, R. Kounoudis, J. Guilloud De Courbeville, E. Caunt, S. Desai   +6 more
doaj   +1 more source