Abstract
Twenty (20) marble samples from Ubo and environs were analyzed both geochemically and statistically with the aim of determining their industrial applicability. The samples were subjected to AAS analysis. Findings revealed a fairly high - very high values of CaO (52.98wt% - 82.18wt %) and low values of MgO (1.64wt%–6.95wt %). Other major oxide such as SiO2, FeO/Fe2O3, Na2O, K2O, Al2O3 and MnO2 had values below 2wt%. The multivariate analysis employed revealed a high correlation between CaO/Fe2O3, MgO/Al2O3 and FeO/CaO which is an indication of their fairly similar valencies and ionic values. The high lime content is connected to the shallow marine environment during deposition prior to metamorphism. The marbles are classified as the high calcite group and their industrial use range from the production of Portland cement to their use for ceramics.Keywords: Marble, Chemical-composition, Metamorphism, Correlation
Highlights
Rahaman, (1989) identified six major rock types and they are: (1) Migmatite – gneiss – quartzite complex (2) Slightly migmatized to non-migmatised metasedimentary and meta- igneous rocks which are often referred to as Newer metasediment (Oyawoye, 1970) or the Schist belts. (3) Charnockitic, gabbroic and dioritic rocks. (4) Members of the Older granite suite. (5) Metamorphosed to unmetamorphosed calcalkaline volcanic and hypabyssal rocks (McCurry, 1976; McCurry and Wright, 1971). (6)
This study is aimed at classifying the marble in the study area geochemically in a bid to determine its applicability in the industrial sector
Clarke (1924) is of the opinion that alkali content decreases in marbles with increase in salinity
Summary
Rahaman, (1989) identified six major rock types and they are: (1) Migmatite – gneiss – quartzite complex (2) Slightly migmatized to non-migmatised metasedimentary and meta- igneous rocks which are often referred to as Newer metasediment (Oyawoye, 1970) or the Schist belts. (3) Charnockitic, gabbroic and dioritic rocks. (4) Members of the Older granite suite. (5) Metamorphosed to unmetamorphosed calcalkaline volcanic and hypabyssal rocks (McCurry, 1976; McCurry and Wright, 1971). (6). (ii) Low grade metasediments,(schists, calcsilicate gneisses, marbles, polymict metaconglomerates and quartzites) (iii) Syn-late tectonics porphyritic biotite and biotite hornblende granodiorites and adammellites, charnockites and gabbros, unmetamorphosed dolerites, pegmatites, aplites and syenite dykes. The Ubo body is associated with crystalline rocks of the Precambrian basement complex including migmatites, quartzites, porphyritic granites, the granites, charnockites, calc-gneisses, pegmatites, biotite and biotite hornblende granites (Figure 2). The outcrop was mined by the Bendel Cement Factory but remnant of the body showed it is white in colour and very coarse grained in texture. It has sharp contact with the charnockites. The Atomic Absorption Spectrophotometer (AAS) was used to determine the other major elements
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