Investigating the Occurrence and Capability of Limestone

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Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 2 of 8,Figure 1 Map indicating the study area. geological mapping prior to the core drilling for the subsurface The recovered core litholog samples were logged for lithology. investigation was done Subsurface investigation followed the plotting alterations and mineralisation in accordance with core logging. of pilot core drilling cordinates on base maps imputing them into GPS procedure Colour Rock Quality Designate RQD and any other. and subsequently locating them on the field Core drill points follow important characteristics were also recorded Core sample chips were. resource mineralization of interest trend after surface mapping plots subjected to dilute hydrochloric HCl acid preliminary testing Figure. on the base map 3 This was complimented with point scanning analyses using portable. X ray fluorescence spectrometry XRF Phillips PW 1400 Magnifying. Control core holes were sunk along the mineralization strike hand lens and measuring tape were further used to take measurement. direction at 4 km apart and 200 m apart on the traverse of the control of the litho unit thickness of the various rock types assayed The geodata. core holes i e across the strike or along dip Figure 2 Coring on these so measured is recorded in a proforma data sheet and subsequently. points depends on prevailing condition of the immediate environment imported into the Rockworks 16 software platform for interpretation. on field Some of the points that fell on difficult terrains such as water Figure 4. logged and steeply slopes were repositioned but not to more than 50. m away from the proposed position Drilling was completed on such a Mineral occurrence window and reserve estimate. variable spacing and at depths between 19 5 to 115 m GX Y 1 16 hp The reserve window in this study is the area within the inferred. rotary rig with a diamond impregnated bit attached to core recovery boundary or the economically viable belt. barrel is used A 0 065 m diameter core was produced from a 0 0777 m. diameter hole using IEX size diamond bits Water is used for the drilling The polygonal method in which the core litholog data of the. fluid to avoid contaminating the core sample Groundwater pumping representative drill hole is used to estimate the reserve in an area Using. test was conducted Depths to groundwater table in the cored holes were the core log of the boreholes description as a guide the reserve window. measured repeatedly at intervals This helps to understudy groundwater of the limestone occurrence is put at ZK3 N 11 ZK1 So 10 ZK5 So 7. condition and movement in the environment Occasionally there ZK9 So 9 to ZK13 So 3 on one trace and at ZK3 No 1 ZK9 So 0 to ZK13. are vugs sparry cement fractured breccias intraclastic mud gouge So 3 This formed a polygon with 16 km length and 2 km width making. in fillings and splitting of the core wedge in the core barrel It was 32 sq meters The mineralized section has limestone core litholog. necessary to pull out the drill stem and clear the core from the barrel reporting various bands thickness ranging from about 0 05 m to 19 m. before continuing the drilling repeatedly at every 3 66 m drilling except Using the formulae equation. if wedging occurred earlier to this All samples recovered were boxed. prior to geostatistical analysis RE L W T D or RE LWTD. J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 3 of 8,Figure 2 Map showing cored holes locations. RE reserve estimate,L bed s length,W minable width. T bed s thickness and, D density of limestone the reserve estimate is made.
Forty two 42 borehole cores were logged and analyzed thirty. two 32 yielded high calcium interbedded limestone bands of various. thicknesses at different depths Bands having considerable limestone. bed thickness of 0 5 m with strip ratio of at most 3 1 were used as. economical representative and used for the reserve estimate The. core logs analysis show that mineralization in the area is laterally and. vertically heterogeneous The heterogeneity is in bands thicknesses. number in cyclic sequence and geochemistry This spatial anomalies. makes reserve estimation difficult especially the geochemical aspect. However the mineralization window were able to be inferred The. boundary is inferred using the last productive border core drill holes or. an outstanding last outcrop exposure These are used to infer the lateral. boundary of the study area Figure 5, At Mbiabong I traverse seven core holes were drilled High. calcium outcrop beds were recovered in five core holes They were all. economical with ZK3 N 9 yielding the best beds The last two core holes. Figure 3 Rock types legend used, on both ends were uneconomical hence supposed to be the boundary. J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 4 of 8, J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu.
Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 5 of 8, J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 6 of 8, J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 7 of 8, Figures 4 Rockworks 16 software lithologs interpretation of the study area.
Figure 5 Mapsource plot indicating mineral window of the study area. J Geol Geophys an open access journal Volume 6 Issue 6 1000308. ISSN 2381 8719, Citation Rock OM Ubechu OB 2017 Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area Near Arochukwu. Southeastern Nigeria Using Core Drilling Method J Geol Geophys 6 308 doi 10 4172 2381 8719 1000308. Page 8 of 8, At Mbiabong II traverse eighteen core holes were sunk Ten underlying rocks in the area The area is also vulnerable to flooding. revealed high calcium beds occurrence and seven of them were menace because it is low lying and nearby the Cross river. economical with NK1 So 1 yielding the best On traverse at Obimba six References. core holes were drilled They all revealed high calcium beds with three. 1 Mackenzie BW Woodall R 1988 Economic productivity of base metal. being economical Core hole ZK5 So 11 showed ten bands with seven exploration in Australia and Canada World Mineral Exploration Trends and. economical bands At Utuma area nine core holes were drilled High economic issues pp 363 444. calcium bands ecovered from eight holes Core hole ZK9 So 0 has the. 2 Muessig S 1979 The art of exploration Econ Geol 74 732 734. best thickness beds but not economical because depth of occurrence In. all there is no traverse with no occurrence of high calcium limestone 3 Adams SS 1985 Using information to develop exploration strategies for. beds Within the mineralization window the depth of occurrence epithermal deposits Reviews in Econ Geol 2 273 298. increases from Mbiabong I to Utuma while thickness of beds decreases 4 Woodall R 1983 Success in mineral exploration Confidence in science and. ore deposit models Geoscience Canada 11 41 46 83 90 and 127 133. on that trend Hence Mbiabong I and II proves to be more economical. 5 Eimon PI 1988 Exploration of epithermal deposits Gold Update 87 88 Course. Conclusion Manual Dept of Geology Univ Southampton pp 68 80. There is good economic prospect for the establishment of a 6 Bailly PA 1972 Mineral Exploration Philosophy Mining Congress Journal pp. limestone raw material dependent factory in the area The area has a good. limestone deposit accessibility network nearby perennial water source 7 Reyment RA 1965 Review of Nigeria s Cretaceous stratigraphy Nig J Min. Geol 1 61 80, and environmental friendly Nevertheless the problem anticipated in. mining the resource could be management of groundwater This is 8 Igwe O O Udo 2008 Characteristic pattern of rainfall in Calabar Nigeria A. due to the general occurrence of low water table and porosity of the tropical coastal location Nigeria Journal of Physics 20 84 91. J Geol Geophys an open access journal Volume 6 Issue 6 1000308. Mbiabong Ukwa Area Near Arochukwu Southeastern Nigeria Using Core Drilling Method Onwe Mkpuma Rock and Odoh Bridget Ubechu Department of Geology Federal University Ndufu Alike Ikwo Nigeria Keywords Reconnaissance Core Drilling Outcrop in Situ Mineral Resource Evaluation Software Introduction Economic mineral deposits are the basement for sustainable economy and industrial development

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