Jan 01, 1988· Geology and geochronology of Okene, south-central Nigeria 125 The upper limit is defined by four points of the Itakpe and three points of the Ego gneisses. Considering the Itakpe samples alone, the four points (lg, lh, li and 5g) would produce an isochron age of 2197 + 31 Ma with an initial 87Sr/86Sr ratio of 0.70512 + 0.00023 and an MSWD value ...
May 01, 1985· Geological map of Nigeria showing the location of the Okene area. (Van Breemen et al., 1977; Grant, 1978). It has also been shown from isotopic data that intermittent tectonic and thermal activity involving parts, if not the entire complex, must have taken place prior to the late Proterozoic--early Palaeozoic thermal peak (Grant, 1970; 1978 ...
Oregon: A Geologic History companion site. The spectacular landscape of Oregon today was shaped over millions of years by fire and flood, earthquakes and eruptions, and the movement of oceans and continents on a huge scale. Where most people see an unchanging landscape, geologists see rocks that tell the story of an ever-shifting world.
10%· The West African Shield is composed of a diverse assemblage of crystalline rocks that range in age from approximately 500 to more than 3000 million jears. These Precambrian rocks constitute the principal source of mineral resources for the subcontinent. The distribution patterns and origin of Precambrian mineral deposits are examined in relation to their geotectonic setting and host- or source ...
Geology is the study of the Earth, the materials of which it is made, the structure of those materials, and the processes acting upon them. It includes the study of organisms that have inhabited our planet. An important part of geology is the study of how Earth's materials, structures, processes and organisms have changed over time.
In the Lokoja-Okene areas iron ore occurs as massive bands and lenses. These tabular ore bodies are up to 45m thick, extending for hundreds of metres to over 5km although locally faulted. The Itakpe Hill deposit is regarded as an itabirite in type and mineable reserves are estimated at 310M tonnes, it is usually mined as a raw material in ...
Geology Of Itakpe Iron Ore haagdeko de. Geology of itakpe saplgroupineology of itakpe iron ore average iron ore content of the ore deposit was deter mined to be approximately the itakpe get price itakpe itakpe is a town in kogi state, nigeria the itakpe hills in and around the town of itakpe contain very pure deposits of iron ore the national iron ore mining company is
The biggest stories in 2019 in geology and paleontology: includes how diamonds can take weeks to form in a lab, fossilized insects in gemstones, mass extinctions, and more. Mica, Mica in the Sand, Tell Us Something Really Grand! Sometimes skeptical scientists just need to listen to what the rocks are saying.
The area lies approximately between latitudes 7015'N and 70 12.5'N and longitudes 4037.5'E and 4040'E, covering an estimated area of 25km2. The study area is located in Atakumausa local government area of Osun state in southwestern Nigeria. The important settlements are Bolorunduro, Egbejoda, Baba Ibadan, Abusoro, Kajola, Onikanga.
Utah: A Geologic History. Today, Utah is a land of great diversity and scenery. Many factors have determined the changes the state has undergone through time. In a sense it could be said that Utah has had many different faces. Through geologic time, Utah has been covered by oceans and inland seas as well as completely dry land.
Sep 24, 2016· A History of Benue State – and us. Benué is a state in the mid-belt region of Nigeria with a population of about 4,253,641 in 2006 census. Idoma and Tiv, are spoken predominantly. There are other ethnic groups, including Igede, Etulo and Abakwa.,  Jukun, Hausa, Akweya and Nyifon. With its capital at Makurdi, Benué is a rich agricultural ...
Geologic history, stratigraphy, and tectonics Paleozoic (541-251 million years ago) The oldest rocks in Italy may include oceanic crust subducted during the Caledonian orogeny and 440 million year old Ordovician granites. Only detrital zircons in the Alps dates to the Precambrian.. These granites are located offshore of Venice, found in the Agip Assunta well and deformed, transforming into ...
Jebba area southwestern Nigeria forms part of the Nigerian basement complex which lies in the Neoproterozoic PanAfrican mobile belt. It is underlain by several lithological units among which is a polydeformed granitic gneiss. This rock has been dated by LA-ICP-MS yielding a concordant U-Pb zircon age of 2207 ± 20 Ma indicating the crystallization age of the granite protolith.
Whole rock and mineral extracts from Nigerian goldfields of late Proterozoic age are significantly more radiogenic than those from the much younger Mesozoic lead-zinc mineralization in the Benue Trough, their common formation by hydrothermal processes notwithstanding. Their marked contrasts in lead isotope compositions can be attributed to differences in source reservoirs, structural settings ...
The Precambrian Period began when the Earth first became a solid planet. It lasted for close to 3,400 million years, ending about 570 million years ago. Because it was such a long period, some geologists have separated it into divisions. The oldest record of Ohio's geologic history is preserved in igneous and metamorphic rocks of this period.
In this study, an integrated remote sensing and geophysical (aeromagnetic and geo-electric) methods was employed to assess the potential of groundwater in a basement complex terrain of Okene and its environs, Southwestern, Nigeria. Landsat imagery acquired over the study area was processed in the Geographic Information Systems (GIS) environment to delineate the surface lineaments, drainage ...
Jun 30, 2019· Geology and History . The Appalachians were formed during a series of collisions and separations of tectonic plates that began 300 million years ago and continued through the Paleozoic and Mesozoic Eras.When the Appalachians were still forming, the continents were in different locations than today, and North America and Europe had collided.
Igarra, a focal point in geological research in Nigeria. The most easterly schist belts in south-western Nigeria it is located around the Okene migmatitic nucleus. It trends NNW-SSE with a length of roughly 50km;it is joined to the west by the Owo belt and to the east by the Okene- Lokoja belt which may have extended into the Muro Hills in the ...
Jun 01, 2021· Annor A.E. U-Pb zircon age for the Kabba-Okene granodiorite gneiss: implication for Nigeria's basement chronology. Afr. Geosci. Rev. 1995; 2:101–105. [Google Scholar] Annor A.E., Freeth S.J. Thermo-tectonic evolution of the basement complex around Okene, Nigeria, with special reference to deformation mechanism. Precambrian Res. 1985; 28:269 ...
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