Petrogenetic and Compositional Features of Rare Metal Pan ...

This research reviews the geology, petrogenesis, compositional trends and geochronology of the rare-metal pegmatite of southwestern Nigeria. The source of these pegmatites is still presently debated which have been explained as either product of highly fractionated molten material or anatexis of the local crust. However, published works of past authors have been compiled to give a detailed ...

The Form and Structural Features of Aplite and Pegmatite ...

FIG. 3.-Aplites and pegmatites invading granite-gneiss, from Osi area of Nigeria. I represents bands in original banded gneiss, which have been partly "rejuvenated" during granitization. 2 shows streaks in granite-gneiss, due to extreme felspathization, associated with granitization. 3 represents aplite related to latest phase of granite-gneiss ...

Post-collisional Pan-African granitoids and rare metal ...

Jul 01, 2014· Mineralised pegmatites are associated with the Older Granite plutons in Nigeria, and existing Rb–Sr dates suggest that the pegmatites in central Nigeria were emplaced at c. 555 Ma (Matheis and Caen-Vachette, 1983). These pegmatites form sheets, typically up to 1–2 m wide, cutting both basement rocks and the Pan-African granitoid plutons.

Rare Metals (Ta-Nb-Sn) Mineralization Potential of ...

Various studies have been carried out on pegmatites in Nigeria by [5] [6]. [4] In the southwestern part of Nigeria, pegmatites are hosted within varieties of rocks of metamorphic and igneous origin where they intrude the older litholo-gies discordantly [8][7] [9] [10] but there is paucity of information on pegma-tites in Igangan sheet 240 NW.

TL response of muscovite samples from granite pegmatite of ...

Aug 01, 2006· High-quality muscovite is characteristic of granite and granite pegmatites, associated with quartz and feldspars. In Nigeria, high-quality muscovite occurs in the granite pegmatite as a belt that extends from southwestern Nigeria to central Nigeria and covers a distance of over 250 km. The muscovite deposits occur as pockets discontinuously ...

Granite vs Pegmatite - Compare Nature

Granite is available in black, grey, orange, pink, white colors whereas, Pegmatite is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors. Appearance of Granite is Veined or Pebbled and that of Pegmatite is Layered, Banded, Veined and Shiny. Properties of rock is another aspect for Granite vs Pegmatite.

GEOCHEMISTRY, CLASSIFICATION CHARACTERISTICS OF …

oligaclase albite and tourmaline -rich pegmatite in Ijero-Ekiti represent the apical parts of a concealed granitoid (most likely Older granite) body. The field relationship shows that the pegmatite occurs as massive and tabular bodies as well as dykes and veins (Plates 1& 2 ). Plate 1: Photomicrograph of tabular pegmatite

Wike: Chipping away at the granite | The Guardian Nigeria ...

2 · Two, Wike has shown the way, to wit, the path to true federalism does not lie through national conferences but through systematically chipping at the granite of the immoveable federal authorities.

Geological and Geochemical Characterisation of Pegmatites ...

pegmatites in southwestern Nigeria are between 620 and 580 Ma (Dada et al. 1993). Olode and environs; the study area is located ... granite gneiss, granite, pegmatite and aplites (Figure 2). Mica schist which is considered the oldest rock type in the area is not exposed anywhere

Nigerian rare‐metal pegmatites and their lithological ...

Dec 01, 1987· Most of Africa's rare‐metal potential is linked to Proterozoic pegmatite fields except for the Jurassic tin‐bearing ring complees of the Jos Plateau Nigeria. In order to establish the position of the Nigerian tin province in terms of economic rare‐metal mineralization, occurrences of mineralized pegmatitic phases of the Nigerian basement complex, including the so‐called 'Older Tin ...

Geochemical characterization of Granitoids in Katchuan ...

Jan 19, 2019· Petrographic studies on Granitoids from Katchuan Irruan and adjoining areas, southeastern Nigeria, has shown that they are garnetiferous biotite granite, aplitic granite, porphyritic hornblende biotite granite, porphyritic muscovite biotite granite, weakly foliated leucogranodiorite and simple pegmatite. They are closely associated with the Precambrian Basement Complex rocks which …

Field features and mode of emplacement of pegmatites of ...

Jul 05, 2015· is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get them in front of 's ...

Petrography and Structural Features of Migmatites ...

Migmatites and granite gneisses Plate 1, were identified at Katchuan Ode, Njua Kaku and Osokom areas while biotite granite, granite-pegmatite and pegmatite, are present at Ogep Osokom, Iso Bendiga and Uwup River. The migmatites are massive and form two highlands above 200m in the area Plates 1 and 2.

(PDF) Industrial Minerals Potentials of Ijero Pegmatite in ...

Over the The Ijero Pegmatite belongs to the industrial mineral years, as the government of Nigeria sought to reduce the groups that form from igneous processes which include reliance of the country's economy on the Niger Delta oil, many pegmatite minerals, such as muscovite, feldspars, the tempo on the study of solid minerals pegmatites has ...

rge 116 87..97 Characterization and Mineralization ...

tials of pegmatites of some localities in Nigeria (Matheis, 1987; Kuster, 1990). Mining of pegmatite minerals (cassiterite and beryl) commenced in 1913 in the Egbe area, Nigeria (Matheis et al., 1979). This spread to other parts of the basement complex of Nigeria with large ups and downs of mining activities over the years. The mining is mostly

Geological and Geochemical Characterisation of Pegmatites ...

Oct 31, 2020· Olode is prolific in terms of pegmatites, occurring in different ways as large intrusive bodies, as veins and dykes, discordantly intruding the host rocks of mica schist, gneiss and granite. This study is aimed at the geological and geochemical characterisation of pegmatites around Olode. Field investigation was undertaken to determine the occurrences and relationships of the pegmatites with ...

Petrochemical Evaluations of the Pan African Pegmatites of ...

Keywords: granite, muscovite, pegmatite, mineralization, precambrian 1. Introduction Pegmatites are known worldwide to host economically important mineral deposits such as gem stones and rare metals such as tantalum, niobium, tin and tungsten. Precambrian pegmatites of Nigeria occur mostly as dyke like

Brief Outline Geology of Nigeria and Minerals

some mineralized pegmatite fields in Nigeria. This broad pegmatite belt also refers to as "theOlder Tin Belt"is rich in Sn, Nb, Ta and world class gemstones including tourmaline, aquamarine, kunzite and spessartine garnet. The emplacement of silica saturated A-type granites (the

Field Features and Mode of Emplacement of Pegmatites of ...

LEGEND Pegmatite Granite Migmatitic Granodiorite Gneiss Granodiorite Gneiss Augen Granodiorite Gneiss Schist - Amphibolite. Settlement Untarred road Main road Sample location. Stream River Lineament # Figure 1.1 Geological map of Nigeria showing locations of Pegmatite of Central Nigeria and the Study area (Modified after Kinnaird, 1984) 2.

Geochemistry and Petrogenetic Evolution of Rocks around ...

porphyritic granite, pegmatite and medium-coarse grained biotite-hornblende granite are silica saturated with values ranging between 71.98% – 73.36%. Metasediments such as the biotite-hornblende schist and biotite gneiss are also silica saturated varying from 74.06% – 75.51. Al 2O 3 is consistently

PETROGRAPHY, GEOCHEMISTRY AND MINERALISATION …

mineralized. Generally, the pegmatites in the Janjala area favourably compared well with other relatively mineralized rare-metal pegmatites of the North Central Nigeria, such as Wamba, Nasarawa and Keffi pegmatites. KEYWORDS: Pegmatite, granite, petrography, geochemistry and mineralization INTRODUCTION

1b. Granite Pegmatite | Wake Technical Community College

Granite Pegmatite. This is a light gray-to-white rock that contains obvious large mineral crystals. Figure 1: The granite pegmatite boulder at Northern Wake Campus. Figure 2: The granite pegmatite boulder at Southern Wake Campus. Very large minerals! In igneous rocks, the term "coarse-grained" means the minerals are large enough to be seen ...

Rare Metals (Ta-Nb-Sn) Mineralization Potential of ...

[15] delineated the occurrence of new rare element pegmatites in Nigeria thereby revealing the possibility of more pegmatite bodies than previously thought. Geochronological studies have been carried out on Nigerian pegmatites with recent studies by [16] suggesting an age of 709 Ma for emplacement of pegmatites in Ede, southwestern Nigeria ...

Feasibility Study of Establishing a Granite Aggregate ...

sediments. The older granite, pegmatite, aplite, and granodiorite can be found in this area. The older granite occupies the whole Area and the most common of them is the porphyritic granite, granodi-orite and aplite are available [8]. Pegmatite is widely distributed throughout the Precambrian basement complex of the Northern Nigeria [4].

Review of the Basement Geology and Mineral Belts of Nigeria

been reported in Oban Massif, southeastern Nigeria[33],[34] and recently in the Kushaka schist belt of Northwestern Nigeria[7]. Within this belt, the individual pegmatite bodies generally trend in a N-S direction. The pegmatites are intrusive hosted by rocks such as migmatites, gneisses, schists and granites of the Pan African

(PDF) Tin Mineralisation in Nigeria: A Review

Although Ogunyele and Akingboye (2018) [14] relate the Pan-African older granite suite with the Nigerian tin-bearing pegmatite, Alayande et al. (2015) [15] allude to the presence of two granite ...

Geochemical Signatures and Mineralization Potentials of ...

In the past, the search for mineralized pegmatites in Nigeria was concentrated within the NE-SW Regions, within the so-called 'Tin Province or Pegmatite Belt of Nigeria' (Jacobson and Webb, 1946). However, recent studies by Ekwueme and Matheis (1995), Ero and Ekwueme (2009), Garba (2003), Okunlola (2004), Okunlola and King (2003),

INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY …

cassiterite concentrates have been won from pegmatites in Nigeria between 1912 and 1944 (Jacobson and Webb, 1946). Two tin fields are recognised in Nigeria namely: (a) The tin fields associated with the Younger granite intrusions of Nigeria, and (b) The tin fields linked to the pegmatites of Central Nigeria (Raeburn, 1924).

Pegmatite - Igneous Rocks

Pegmatite is a very coarse-grained igneous rock. Simple pegmatites are composed of large crystals of ordinary minerals. Here is a sample of alkali feldspar granite pegmatite from Northern Norway which is composed of alkali feldspar (pink), quartz (gray) and biotite (black). Width of view 50 cm.

Gitata Gold Granite Block, Pegmatite Granite Block from ...

Gitata Gold Granite Block, Pegmatite Granite Block from Nigeria, The details include pictures,sizes,color,material and origin.You can contact the supplier - OFL Marble and Granite Limited.

Structure and tectonics of Hong Hills in Hawal Precambrian ...

pegmatite dykes are intensely sheared. Minor occurrences of complex pegmatites are found at Zivi hill area exposed as ridges. Granites These occur as elliptical bodies oriented in the N-S direction which is consistent with what is observable in other Pan-African sectors in Nigeria (Udinmwen, 2017;

MINERALIZATION CONTROLS AND PETROGENESIS OF …

that the pegmatite emplacement occurred at the end of Pan-African magmatic activity. The Nasarawa pegmatite field is also in close spa - tial relationship with the granites of Afu Complex, which is the southernmost occurrence of the 1250 km-long belt of ring complexes extending across Niger and Nigeria. Rb/Sr age decreases from Ordovician in

Nigerian rare‐metal pegmatites and their lithological ...

Pegmatite occurrences from southwest Nigeria, which are emplaced into Proterozoic meta-sedimentary-metavolcanic sequences, are enriched in tantalum relative to niobium. These geochemical characteristics are also displayed by the composition of eluvial heavy-mineral concentrates as well as by the trace-element distribution in cassiterites.

MINERALIZATION POTENTIALS OF PEGMATITES IN THE …

Nigeria possesses a very large pegmatite environment. The pegmatites are widely distributed with a marked concentration of mineralized pegmatites in a broad belt, which extends from Ago-Iwoye in the southwest to Bauchi in the northeast, an air distance of more than 400kilometers. Thousands of pegmatites occur in this

Rare-metal pegmatites of Wamba, central Nigeria - their ...

Sep 27, 2013· 10%· he Sn-(Nb, Ta) mineralization of the Wamba field (central Nigeria) occurs in muscovite-quartz-microcline pegmatites, which are related to the late-orogenic Pan-African (f 550 Ma) "Older Granites". The emplacement of granites and pegmatites was controlled by late Pan-African shear tectonics. The granitoid magmatism was multiphase and has produced peraluminous …

Major Rocks In Nigeria - migmatite, gneiss, migmatite ...

The Nigeria basement complex have been conformed to comprise of three major rock units of which are; migmatite, gneiss, migmatite gneiss, the schist belt and older granite and younger granite complexes and all of these are seen in different location of the studied area. From this description of rocks units and also the younger granite intrusion.

Relationship Between Geology And Trace Elements Studies Of ...

Several others have carried out extensive research on geochemical and petrochemical analysis on pegmatites from southwestern Nigeria. Akintola et al (2011) examined pegmatite around Awo and concluded that the pegmatite contains accessory minerals such as tourmaline, garnet, beryl and spodumene together with some rare metals.

Characterization and Mineralization Potentials of Granitic ...

Feb 22, 2010· The occurrence of rare metals in Nigeria is broadly divided into two episodes of mineralization: tin-niobium mineralization, associated with Mesozoic anorogenic Younger Granites of central northern Nigeria, and older (∼550 Ma) Ta-Nb-Sn-Li-Be mineralization in the pegmatites associated with the Pan-African Orogeny (Kinnaird, 1984). Tin was the ...

Preliminary investigation on industrial properties of the ...

In Olode-Falansa area, which is part of the southwestern basement complex of Nigeria near Ibadan, the major rock types are granite gneiss, quartzite, medium-grained granite and pegmatite. In particular, the pegmatites which occur as low-lying bodies, with a mineralogy dominated by pinkish-white microcline perthite, quartz, muscovite and plagioclase plus accessory constituents of garnet, beryl ...