• PETROCHEMICAL STUDIES OF

    Pegmatites are wide spread throughout the basement complex of Southwestern Nigeria. Precambrian pegmatite occurs mostly in the Western half of Nigeria along NE-SW pegmatitic trending belt (Jacobson and Webb, 1964). The mineralogy of pegmatite compose of feldspar, quartz, mica and other accessory minerals in varying

  • The behaviour of Feldspar Megacrysts in Granitic Pegmatite ...

    granodiorite or present in the pegmatite veins, which occur ubiquitously in the area. A more detailed description of the pegmatite and host rock is provided by [1]. The study area is a part of the Precambrian mobile belt of Nigeria, in the western part of the Oban massif, SE Nigeria.

  • Nigerian rare‐metal pegmatites and their lithological ...

    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 ...

  • Gitata Gold Granite - Gold Granite - StoneContact

    Gitata Gold is a premium golden coloured stone sourced in Nasarawa State- Nigeria. Gitata Gold stone is especially good for counter tops, monuments, mosaic, exterior - interior wall and floor applications, fountains, pool and wall capping, stairs, window sills and other design projects. It also called Gitata Golden Granite,Pegmatite Granite, Nasarawa Gold Granite .

  • X-Ray Fluorescence Base Investigation of the Gwon-Gwon ...

    From the available data presented, it is clear that the development of the rare-metal pegmatite of Gwon-Gwon in Wamba Central Nigeria is related to granite magmatism [7, 8]. From the ternary plots, it could be deduced that there is a clear genetic link between the parent granite and the pegmatite with incomplete fractionation which could be due ...

  • Author: Abdullahi A.M, Haruna A.I, Usman A.M, A. S. Arabi
  • Field and petrochemical studies of pegmatites in parts of ...

    The pegmatite bodies in the study area occur as concordant flat-lying and discordant intrusive dykes and veins of variable widths from few centimetres to a little above 30 m and lengths of 20 m to 300 m in the Migmatite Gneiss, Obajana Gneiss Member and the Older Granite of the Southern Nigerian Basement complex in the Lokoja area ().Pegmatite bodies have northerly trends in the N–S, NE–SW ...

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

    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.

  • Tourmaline Mineral Deposits in Nigeria with their ...

    Tourmaline is deposited in Kaduna, Nasarawa and Osun States of Nigeria. Granite, granite pegmatites, schist, and marble are a major source of tourmaline. Tourmaline is a boron silicate mineral with crystalline nature with compounded elements of aluminium, iron, magnesium, sodium, lithium, or potassium.

  • Pegmatite: Igneous Rock - Pictures, Definition More

    FormationCompositionSignificancePropertiesUsageGeologyApplicationsPegmatites are extreme igneous rocks that form during the final stage of a magmas crystallization. They are extreme because they contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks. Pegmatites form from waters that separate from a magma in the late stages of crystallization; this activity often occurs in small pockets along the margins of a batholith. Pegmatite can also form in fractures that develop on the margins of the batholith. This is how pegmatit
  • Pegmatite - Wikipedia

    A pegmatite is an igneous rock, formed underground, with interlocking crystals usually larger than 2.5 cm in size (1 in).Most pegmatites are found in sheets of rock (dikes and veins) near large masses of igneous rocks called batholiths.The word pegmatite derives from Homeric Greek, πήγνυμι (pegnymi), which means “to bind together”, in reference to the intertwined crystals of quartz ...

  • The behaviour of Feldspar Megacrysts in Granitic Pegmatite ...

    granodiorite or present in the pegmatite veins, which occur ubiquitously in the area. A more detailed description of the pegmatite and host rock is provided by [1]. The study area is a part of the Precambrian mobile belt of Nigeria, in the western part of the Oban massif, SE Nigeria.

  • Industrial Minerals Potentials of Ijero Pegmatite in Ekiti ...

    Industrial Minerals Potentials of Ijero Pegmatite in Ekiti State, Southwestern Nigeria P.T. Ale, J.A. Dada and A.J. Adewumi Department of Geological Sciences, Achievers University Owo, Nigeria Abstract: Nigeria pegmatites are concentrated in a 400km NE-SW trending belt of which Ijero pegmatite

  • 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.

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

    117 Pegmatites of this type are typically associated with peraluminous or S-type granites 118 (Cerny et al., 2012) and in western Nigeria the pegmatites are most commonly found 119 close to the margins of peraluminous granite plutons. However, dating indicates that

  • Tin Mineralisation in Nigeria - IIETA - MAFIADOC.COM

    The mineralized pegmatite belt extends from southwestern (Ijebu area) to northern Nigeria (through Wamba-Jema’a to Zuru-Gusau area) covering a broad, over 400km long zone trending NE–SW and parallel to the linear pattern of the other two metallogenic provinces (Younger Granite and Cretaceous Benue Trough provinces) [25, 29, 32, 33].

  • Tourmaline Mineral Deposits in Nigeria with their ...

    Tourmaline is deposited in Kaduna, Nasarawa and Osun States of Nigeria. Granite, granite pegmatites, schist, and marble are a major source of tourmaline. Tourmaline is a boron silicate mineral with crystalline nature with compounded elements of aluminium, iron, magnesium, sodium, lithium, or potassium.

  • (PDF) Solid Mineral Deposits of Nigeria: Potentials ...

    Nigeria. This broad pegmatite be lt also ... This project aims at studying the formation of Mo-W-Bi mineralization in some complexes of the Nigerian Younger granite and to constrain the sources of ...

  • 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.

  • 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),

  • Compositional features of precambrian pegmatites of Ago ...

    Generalized geological map of Nigeria (Oyawoye, 1972). which include granite, granodiorite, diorite charnockite, pegmatites and aplites. The Ago-Iwoye study area covers the northeastern part of the map of Ijebu-Ode sheet 280 NE. The rock types observed in this area include coarse porphyritic granite, biotite- granite-gneiss,

  • 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.

  • Nigerian Granite Mohs - Logan Sainlez

    Nigeria granite tiles find out your desired nigeria granite tiles with high quality at low price many stone suppliers publishing nigeria granite tiles products ... Schorl and lithiumrich tourmalines are usually found in granite and granite pegmatite magnesiumrich tourmalines dravites are generally restricted to schists and marble tourmaline is ...

  • Exploration Strategy and Methods for Pegmatite Deposits of ...

    Shearer CK, Papike JJ, Laul JC (1987) Mineralogical and chemical evolution of a rare-element granite-pegmatite system: Harney Peak granite, Black Hills, South Dakota. Geochim Cosmochim Acta 51: 473–486 CrossRef Google Scholar. Shmakin BM (1979) Composition and structural state of K-feldspars from some U.S. pegmatites.

  • 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.

  • Compositional features of precambrian pegmatites of Ago ...

    Generalized geological map of Nigeria (Oyawoye, 1972). which include granite, granodiorite, diorite charnockite, pegmatites and aplites. The Ago-Iwoye study area covers the northeastern part of the map of Ijebu-Ode sheet 280 NE. The rock types observed in this area include coarse porphyritic granite, biotite- granite-gneiss,

  • 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.

  • Nigerian Granite Mohs - Logan Sainlez

    Nigeria granite tiles find out your desired nigeria granite tiles with high quality at low price many stone suppliers publishing nigeria granite tiles products ... Schorl and lithiumrich tourmalines are usually found in granite and granite pegmatite magnesiumrich tourmalines dravites are generally restricted to schists and marble tourmaline is ...

  • Nigerian Granite Mohs

    Its found in granite pegmatites. Russia, Burma and Brazil have been sources of gem phenakite. More recently deposits have been found in Madagascar, and in 2008 a significant deposit of beautifully etched and unusually large phenakite crystals was found in Nigeria.

  • 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.

  • 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

  • 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.

  • Exploration Strategy and Methods for Pegmatite Deposits of ...

    Shearer CK, Papike JJ, Laul JC (1987) Mineralogical and chemical evolution of a rare-element granite-pegmatite system: Harney Peak granite, Black Hills, South Dakota. Geochim Cosmochim Acta 51: 473–486 CrossRef Google Scholar. Shmakin BM (1979) Composition and structural state of K-feldspars from some U.S. pegmatites.

  • Adetunji et al. (21)

    Around Ile-Ife in southwestern Nigeria, granite gneiss yielded a U-Pb zircon age of 1.85 Ga (Rahaman, 1988). The felsic components occur as anastomosing veins of aplite, granite and pegmatite. Quartzite (metasediment) forms the major structural markers in the area, particularly with a similar fold at the northeastern end (Figure 1). The axis of ...

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

    The rare-metal pegmatites represent the youngest intrusions in this area and thus are likely to have formed in a separate magmatic episode, post-dating granite intrusion. The Minna area of western Nigeria lies within a Pan-African orogenic belt that extends along the margin of the West African Craton, from Algeria southwards through Nigeria ...

  • GEOLOGY AND ENVIRONMENTAL IMPACT ASSESSMENT AND

    The Older Granite of Nigeria includes a wide spectrum of rocks varying in composition from tonalite through granodiorite to granite, syenite and ... forming a contact with the granite. Feldspathic rich pegmatite is bounded to the east, with average width of 65meters and 100 meters long, the pegmatite host tourmaline. Granitic rocks dominate

  • Nigerian Granite Mohs

    Cone Crushers Mohs Hardness Lamaing. Nigerian Granite Mohs Logan Sainlez. Cone Crushers Mohs Hardness Mohs hardness for basalt rock hardness of granite rock hsfoerdertechnik learn more mohs hardness scale chart for granite sandstone rocks with hardness 13 are soft rocks from 36 are medium hardness rocks and 610 are hard get price and support online what is the mohs hardness of basalt

  • ekiti state nigeria granite - Matiya

    1University of Ado-Ekiti, Department of Geology, Nigeria. *Corresponding author. ... semblage and schistose rocks with paucity of granite and pegmatite forming steeply dipping ... Ekiti State in the southwestern part of the country. These rocks... >> Get Quotation

  • Compositional features of precambrian pegmatites of Ago ...

    Generalized geological map of Nigeria (Oyawoye, 1972). which include granite, granodiorite, diorite charnockite, pegmatites and aplites. The Ago-Iwoye study area covers the northeastern part of the map of Ijebu-Ode sheet 280 NE. The rock types observed in this area include coarse porphyritic granite, biotite- granite-gneiss,

  • ekiti state nigeria granite - Matiya

    1University of Ado-Ekiti, Department of Geology, Nigeria. *Corresponding author. ... semblage and schistose rocks with paucity of granite and pegmatite forming steeply dipping ... Ekiti State in the southwestern part of the country. These rocks... >> Get Quotation

  • Petrography and the Need to Establish Optimum Blasting ...

    southeastern Nigeria. There are over twenty-eight quarries in Akamkpa-Oban mining district. The area is a major mining district which supplies aggregates and dimension stone in the south-south and southeastern Nigeria. The rock types identified are granite, pegmatite, dolerite and migmatite.

  • Geology and Petrochemistry of Granitic Pegmatite in Jema'a ...

    The pegmatites contains more fluxes and liquidus depressing elements (P, H2O, F) especially phosphorus. The granitoids (biotite muscovite granite, albite granite and granite aplite) are therefore fertile, peraluminous, siliceous and S-type and are parental to the pegmatites.

  • INTERNATIONAL JOURNAL OF SCIENTIFIC TECHNOLOGY

    compositions ranging from granite to granodiorite and charnockite with minor pegmatite and dolerite dykes that belongs to the last stage of Pan-African magmatism [10]. The minor pegmatite plays host to the lepidolite mineral in Ijero-Ekiti. 3.0 Methodology of study A

  • Compositional trends and rare metal (Ta-Nb) mineralization ...

    lying pegmatite veins intruding gneisses, schists and granitic rocks around Igbeti area, southwestern Nigeria. This is with a view to determine their compositional characteristics and rare metal Ta-Nb potential. A total of 24 samples comprising whole rock pegmatites and mineral ex-

  • Tantalum-(niobium-tin) mineralisation in pegmatites and ...

    Rare-metal granite and REP districts in Africa are part of Archaean, Palaeoproterozoic, Neoproterozoic, Palaeozoic and Mesozoic provinces. Each period of Ta ore formation is characterised by specific mineralogical and geochemical features. ... pegmatites associated with the Older Granites of Nigeria and many pegmatites in the Damara Belt of ...

  • Origin of the younger granites of northern Nigeria ...

    — Snelling, N. J., Truswell, J. F.: Age determinations in the geology of Nigeria, with special reference to the older and younger granites. Overseas Geol. Mineral.

  • Rare Earth Element Geochemistry of Stream Sediments from ...

    pegmatite is wholly crystalline igneous rock located in about 50km NW of Ado-Ekiti with coordinates 7°49′ N and 5°5′E (Ale et al., 2014). Fig. 1. Geology of Ijero Ekiti (after Okunola and Akinola, 2010). The pegmatites are known to host the gemstones, lithium, tantalite,

  • Tourmaline and Sapphire from Nigeria Gems Gemology

    The miners descend 10 to 20 meters by ladder to the bottom of a pit, and then the pegmatites are blasted and tunneled before extraction. Some tunnels are linked when production overlaps, improving air circulation. ... Nigeria has produced large quantities of fine-quality basalt-related sapphires. Extraction should start by late spring, with ...

  • Rare Earth Elements And Rare Elementsconcentration In Two ...

    elements in two pegmatite fields. The research area is located within the basement complex rocks of north central Nigeria (Fig. 1). Pegmatite fields 1 is found in Akwanga area while pegmatite field 2 in Keffi area both in Nasarawa State and are separated with distance approximately 68.007km in a ENE-SSW trend (Fig. 2). This trend is in accordance

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

    The rare-metal pegmatites represent the youngest intrusions in this area and thus are likely to have formed in a separate magmatic episode, post-dating granite intrusion. The Minna area of western Nigeria lies within a Pan-African orogenic belt that extends along the margin of the West African Craton, from Algeria southwards through Nigeria ...

  • Pegmatite rock Britannica

    Pegmatite, almost any wholly crystalline igneous rock that is at least in part very coarse grained, the major constituents of which include minerals typically found in ordinary igneous rocks and in which extreme textural variations, especially in grain size, are characteristic. Giant crystals,

  • 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