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| Paper Type | : | Research Paper |
| Title | : | Fluid and lithology discrimination of Amangi hydrocarbon field of the Niger Delta using Lambda-Mu-Rho technique |
| Country | : | Nigeria |
| Authors | : | Sonny Inichinbia, Peter O. Sule, Aminu L. Ahmed, Halidu Hamza and Lucky M. Omudu |
 |
: | 10.9790/0990-02220107  |
Abstract:Lambda-Mu-Rho analysis was used to identify gas sands of two reservoirs (H1000 and H4000) in Amangi field of the Nigerian Delta. The main objective of this study was to provide a detailedprediction of the properties of these two Tertiary reservoirs using thistechnique of gas sand identification. This was possible because each lithology has a different rock properties response subject to fluid content and mineral properties.
[1]. B. Goodway, T. Chen and J. Downton, Improved AVO fluid detection and lithology discrimination using Lame petrophysical parameters: "λρ", "μρ" and "λ/μ fluid stack", from P and S inversions,Canadian Society of Exploration Geophysicists Recorder, 1997, 3 – 5.
[2]. J. Pendrel, and P. van Riel, Estimation and interpretation of P- and S- impedance volumes from simultaneous inversion of P-wave offset seismic data, Society of Exploration Geophysicists, Expanded Abstracts, 2000, 1 – 4.
[3]. P. F. Anderson, and F. D. Gray, Using LMR for Dual Attribute Lithology Identification, San Antonio, Main Menu, Society of Exploration Geophysicists, Expanded Abstracts, 2001, 1 – 2.
[4]. G. B. Madiba, and G. A. McMechan, Processing, inversion, and interpretation of a 2D seismic data set from the North Viking Graben, North Sea,Geophysics, 68(3), 2003, 837 – 848.
[2]. J. Pendrel, and P. van Riel, Estimation and interpretation of P- and S- impedance volumes from simultaneous inversion of P-wave offset seismic data, Society of Exploration Geophysicists, Expanded Abstracts, 2000, 1 – 4.
[3]. P. F. Anderson, and F. D. Gray, Using LMR for Dual Attribute Lithology Identification, San Antonio, Main Menu, Society of Exploration Geophysicists, Expanded Abstracts, 2001, 1 – 2.
[4]. G. B. Madiba, and G. A. McMechan, Processing, inversion, and interpretation of a 2D seismic data set from the North Viking Graben, North Sea,Geophysics, 68(3), 2003, 837 – 848.
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| Paper Type | : | Research Paper |
| Title | : | AVO inversion and Lateral prediction of reservoir properties of Amangi hydrocarbon field of the Niger Delta area of Nigeria |
| Country | : | Nigeria |
| Authors | : | Sonny Inichinbia1, Peter O. Sule2, Aminu L. Ahmed2 and *Halidu Hamza |
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: | 10.9790/0990-02220817 |
Abstract:Well log modelling was performed using a complete suite of compressional, shear and density logs to understand and determine the expected angle dependent effects in the seismic reflection data and also to estimate wavelets for the different input stacks. The available well controls were used in wavelet estimation and we incorporated AVO modelling to properly account for AVO effects
[1]. T. K. Spikes, Statistical classification of seismic amplitude for saturation and net-to-gross estimates. The Leading Edge, 28(12), 2009, 1436 – 1445.
[2]. R. Bachrach, M. Beller, C. C. Liu, J. Perdomo, D. Shelander, N. Dutta, and M. Benabentos, Combining rock physics analysis, full waveform prestack inversion and high resolution seismic interpretation to map lithology units in deep water: A Gulf of Mexico case study. The Leading Edge, 23(4), 2004, 378 – 383.
[3]. T. Mukerji, A. Jørstad, P. Avseth, G. Mavko, and J. R. Granli, Mapping lithofacies and pore fluid probabilities in a North Sea reservoir: Seismic inversions and statistical rock physics. Geophysics, 66(4), 2001, 988–1001.
[2]. R. Bachrach, M. Beller, C. C. Liu, J. Perdomo, D. Shelander, N. Dutta, and M. Benabentos, Combining rock physics analysis, full waveform prestack inversion and high resolution seismic interpretation to map lithology units in deep water: A Gulf of Mexico case study. The Leading Edge, 23(4), 2004, 378 – 383.
[3]. T. Mukerji, A. Jørstad, P. Avseth, G. Mavko, and J. R. Granli, Mapping lithofacies and pore fluid probabilities in a North Sea reservoir: Seismic inversions and statistical rock physics. Geophysics, 66(4), 2001, 988–1001.
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| Paper Type | : | Research Paper |
| Title | : | Estimation of net-to-gross of among hydrocarbon field using well log and 3D seismic data |
| Country | : | Nigeria |
| Authors | : | Sonny Inichinbia1, Peter O. Sule2, *Halidu Hamza2, and Aminu L. Ahmed |
|
: | 10.9790/0990-02221826 |
Abstract: We present quantitative estimates of net-to-gross of Amangi Field from seismically derived rock properties. We employed well log calibrated seismic inversion attributes using Rock Physics and prestack seismic (AVO) inversion. Crossplots of rock properties and attributes of the well log data from the target reservoirs were analyzed. The reservoir sands were found to have high P-impedances values comparable to the shales (22,000 g/cm3 ft/s – 28000 g/cm3 ft/s). Thus, P-impedance alone could not separate the sands from the shales while the S-impedance domain does. The sands are termed "hard" sands.
[1]. K. T. Spikes, Statistical classification of seismic amplitude for saturation and net-to-gross estimates, The Leading Edge, 28(12), 2009, 1436 – 1445.
[2]. M. Sengupta, R. Bachrach, and N. Banik, Net-to-gross from seismic P and S impedances: estimation and uncertainty analysis using Bayesian statistics, 6th International Conference & Exposition on Petroleum Geophysics, "Kolkata 2006", 2006, 1045 – 1049.
[3]. L. Vernik, D. Fisher, and S. Bahret, Estimation of net-to-gross from P and S impedance in deep water turbidites. The Leading Edge, 21(4), 2002, 380 – 387.
[4]. J. I. Nwachukwu, and P. I. Chukwura, Organic matter of Agbada Formation, Niger Delta, Nigeria. The American Association of Petroleum Geologists Bulletin, 70(1), 1986, 48 – 55.
[2]. M. Sengupta, R. Bachrach, and N. Banik, Net-to-gross from seismic P and S impedances: estimation and uncertainty analysis using Bayesian statistics, 6th International Conference & Exposition on Petroleum Geophysics, "Kolkata 2006", 2006, 1045 – 1049.
[3]. L. Vernik, D. Fisher, and S. Bahret, Estimation of net-to-gross from P and S impedance in deep water turbidites. The Leading Edge, 21(4), 2002, 380 – 387.
[4]. J. I. Nwachukwu, and P. I. Chukwura, Organic matter of Agbada Formation, Niger Delta, Nigeria. The American Association of Petroleum Geologists Bulletin, 70(1), 1986, 48 – 55.
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| Paper Type | : | Research Paper |
| Title | : | Depositional Trends and Sedimentary Environments of the Cenomanian-Turonian Sediments along G. Nezzazat-G. Ekma, South-West Sinai, Egypt |
| Country | : | Egypt |
| Authors | : | Farouk M. El Fawal, Hatem F. Hassan and Amer A. Shehata |
|
: | 10.9790/0990-02222738 |
Abstract: The Upper Cretaceous sedimentary succession at G. Nezzazat-G. Ekma, west-central Sinai was examined to detect the depositional trends responsible for its development and discuss the depositional sedimentary environments dominated its evolution. The examined succession spanning from early Cenomanian to Turonian age and consists of three rock units namely from the base; Raha, Abu Qada and Wata formations. The detailed lithological and sedimentological characteristics of the concerned succession revealed that Raha Formation has been subdivided into Abu Had Member and Mellaha Sand Member and diagnostically characterized by the presence of both three clastic and three non clastic microfacies association on the other hand,
1] A. M. Abdallah and A. Adindani, Notes on the Cenomanian-Turonian contact in the Galala Plateau, Eastern Desert, Egypt. Egy. J. Geol., 7, 1963, 67-70.
[2] G. I. Abdel-Gawad and A. Zalat, Some Upper Cretaceous macro-invertebrates from Gebel El-Hamra and Gebel Um Heriba, Mitla Pass, west central Sinai. -Proc. 1st Internat. Conf. Geol. Arab World, Cairo Univ. Egypt, 1992, 333-344.
[3] T. I. Anan, A. El-Shahat, A. Genedi, and M. Grammer, Depositional environments and sequence architecture of the Raha and Abu Qada formations (Cenomanian–Turonian), west central Sinai, Egypt. J. Afr. Ear. Sci., 82, 2013, 54-69.
[4] M. G. Barakat, M. Darwish and A. N. El Bakooky, Lithostratigraphy of the post Carboniferous-pre Cenomanian in west central Sinai and Gulf of Suez, Egypt. In: EGPC 8th Expl. Conf., 1986, 1-15.
[5] Y. Bartov and G. Steinitz, The Judea and Mount Scopus groups in the Negev and Sinai with trend surface analysis of the thickness data. Isr. J. Ear. Sci. 28, 1977, 119-148.
[2] G. I. Abdel-Gawad and A. Zalat, Some Upper Cretaceous macro-invertebrates from Gebel El-Hamra and Gebel Um Heriba, Mitla Pass, west central Sinai. -Proc. 1st Internat. Conf. Geol. Arab World, Cairo Univ. Egypt, 1992, 333-344.
[3] T. I. Anan, A. El-Shahat, A. Genedi, and M. Grammer, Depositional environments and sequence architecture of the Raha and Abu Qada formations (Cenomanian–Turonian), west central Sinai, Egypt. J. Afr. Ear. Sci., 82, 2013, 54-69.
[4] M. G. Barakat, M. Darwish and A. N. El Bakooky, Lithostratigraphy of the post Carboniferous-pre Cenomanian in west central Sinai and Gulf of Suez, Egypt. In: EGPC 8th Expl. Conf., 1986, 1-15.
[5] Y. Bartov and G. Steinitz, The Judea and Mount Scopus groups in the Negev and Sinai with trend surface analysis of the thickness data. Isr. J. Ear. Sci. 28, 1977, 119-148.
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| Paper Type | : | Research Paper |
| Title | : | Appraisal of Geodiversity of Kansai-Tangai Interfluves Area (Paschim Medinipur District, West Bengal) using Remote Sensing Data and GIS tools: An Effort to Forward Landscape Management |
| Country | : | India |
| Authors | : | Ansar Khan1, Soumendu Chatterjee2, Nilay Kanti Barman |
|
: | 10.9790/0990-02223949 |
Abstract: Landscape Character is a distinct and recognizable pattern of elements that occur consistently in a particular type of landscape. Particular combination of geology, landform, soils, vegetation, land use, field patterns and human settlement create character. Land is limited resource and therefore land has become more valuable than ever. Land use pattern is changing, deforestation is occurred, settlement and agricultural practices is increased and that demands more land.
[1]. Gordon, J.E., Brazier, V. & Lees, R.G. (1994) Geomorphological systems: developing fundamental principles for sustainable landscape management. In O‟Halloran, D., Green, C., Harley, M., Stanley, M. & Knill, J. (eds) Geological and Landscape Conservation. Geological Society, London, 185–189.
[2]. Turner, T. (1998) Landscape Planning and Environmental Impact Design. 2nd ed. UCL Press, London.
[3]. McMillan, A.A., Gillanders, R.J. & Fairhurst, J.A. (1999) The Building Stones of Edinburgh. 2nd ed. Edinburgh Geological Society, Edinburgh.
[4]. Gray, J.M. (1997a) Planning and landform: geomorphological authenticity or incongruity in the countryside. Area, 29, 312–324. Milton, K. (2002) Loving Nature: Towards an Ecology of Emotion. Routledge, London.
[2]. Turner, T. (1998) Landscape Planning and Environmental Impact Design. 2nd ed. UCL Press, London.
[3]. McMillan, A.A., Gillanders, R.J. & Fairhurst, J.A. (1999) The Building Stones of Edinburgh. 2nd ed. Edinburgh Geological Society, Edinburgh.
[4]. Gray, J.M. (1997a) Planning and landform: geomorphological authenticity or incongruity in the countryside. Area, 29, 312–324. Milton, K. (2002) Loving Nature: Towards an Ecology of Emotion. Routledge, London.
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| Paper Type | : | Research Paper |
| Title | : | Global warming affects on Fishing village in India (A case study on Andhra coastal village: Uppada) |
| Country | : | India |
| Authors | : | Ch. Guru prasad, Gaddem. Narasimha Rao |
|
: | 10.9790/0990-02225056 |
Abstract: People living near cliffs and shorelines at risk. The great concentration of National resources in coastal zones makes it imperative that coastal change is well understood. Sea level has risen about 40 cm in the past century and is projected to rise another 60 cm in the next century. Due to global warming, average rise of sea level is of the order of 1.5 to 10 mm per year. It has been observed that sea level rise of 1 mm per year could cause a recession of shoreline in the order of about 0.5 m per year. Andhra Pradesh has a coastline of 974 km. Among which the Bay of Bengal Sea. Coast has frequently been affected by cyclones and inundated by storm surges. Erosion is noticed at Uppada, Visakhapatnam and Bhimunipatnam.in Andhra Pradesh coastal areas. Recent research is making it increasingly clear that climate change will change and damage the coastal environment. Now presented in this paper causes, effects and remedial techniques, it is useful to the disaster and risk management studies, planer, geo- morphologists, environmental researchers, academicians and administrators.
Key words: Bay of Bengal, Cyclone, Erosion, Sea level, Technique.
Key words: Bay of Bengal, Cyclone, Erosion, Sea level, Technique.
[1]. Praveenkhanna, Udayakumar, Effects of Sea Level Change on Vulnerable East Coast of India, Research Journal of Marine Sciences, 2(1), 2014, 1-5.
[2]. M. Zafar-ul Islam, Shaily Menon, Xingong Li & A. Townsend Peterson, Forecasting ecological impacts of sea-level rise on coastal conservation areas in India, Journal of Threatened Taxa, 5(9), 2013, 4349–4358.
[3]. Manik Mahapatra, R. Ratheesh and Rajawat, A Sea level rise and coastal vulnerability assessment: a review, International Journal of Geology,Earth & Environmental Sciences, 3 (3), 2013, 67-80.
[4]. Dwijendra Nath dwivedi, Dr. Vinod Kumar Sharma, Analysis of sea level rise and its impact on coastal wetlands of India, Proceedings of the 14th Biennial Coastal Zone Conference, New Orleans, Louisiana, 2005.
[5]. Indu Jain, A.D. Rao, V. Jitendra, and S.K. Dube, Computation of Expected Total Water Levels along the East Coast of India, Journal of Coastal Research,26 (4), 2010, 681–687.
[2]. M. Zafar-ul Islam, Shaily Menon, Xingong Li & A. Townsend Peterson, Forecasting ecological impacts of sea-level rise on coastal conservation areas in India, Journal of Threatened Taxa, 5(9), 2013, 4349–4358.
[3]. Manik Mahapatra, R. Ratheesh and Rajawat, A Sea level rise and coastal vulnerability assessment: a review, International Journal of Geology,Earth & Environmental Sciences, 3 (3), 2013, 67-80.
[4]. Dwijendra Nath dwivedi, Dr. Vinod Kumar Sharma, Analysis of sea level rise and its impact on coastal wetlands of India, Proceedings of the 14th Biennial Coastal Zone Conference, New Orleans, Louisiana, 2005.
[5]. Indu Jain, A.D. Rao, V. Jitendra, and S.K. Dube, Computation of Expected Total Water Levels along the East Coast of India, Journal of Coastal Research,26 (4), 2010, 681–687.
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| Paper Type | : | Research Paper |
| Title | : | Groundwater Quality and its Suitability for Domestic and Agricultural Use in Khanaqin Town, Iraq |
| Country | : | India |
| Authors | : | Khalid Abdullah and Bhavana N. Umrikar |
|
: | 10.9790/0990-02225766 |
Abstract: Khanaqin area is drained by an ancient river Al-Wand which is a vital source of water for agricultural activities in the area. In summer months, discharge in Al-Wand River decreases considerably, threatening the agricultural practices and economic situation in Khanaqin. It has been observed that the water levels were high in 1980s, reaching a discharge/flow of 10m3/s whereas the river flow has been reduced to >1m3/s or sometimes dry up in summer. As a result the province is suffering from severe scarcity of both drinking- and irrigation water. Ultimately the groundwater dependency is on rise and during last few years the number of bore wells has increased in and around Khanaqin area. In present situation, groundwater is the major source for domestic and agricultural activity in this area.
[2]. Al-Manmi DA. Water Resources management in Rania Area, Sulaimaniyah, NE-Iraq. Unpublished P.hD. Thesis, College of Science, University of Baghdad. 2008; 225. Heshmati A. Integrated Water Resource Management in the Kurdistan Region (Water Resource Planning, Development and Management). Nova Science Publishers, Inc., 2013; ISBN-13: 978-1607412953, 225.
[3]. Lawa FA, Kareem KH, Ali SS. Hydrogeological study of Sulaimaniyah and part of Kirkuk areas, NE Iraq.Part two: Bazian-Sangaw Basin, Surdash-Koya asin, Qaradagh-Kalar Basin. Report, FAO GWU documentation Fund, Erbil; 2002.
[4]. Nabi AQ. Limnological and bacteriological studies on some wells within Hawler city, Kurdistan region, Iraq. M.Sc. Thesis, Univ. of Salahaddin, Hawler; 2005.
[5]. Al-Jibori H. Hydrogeological map of Khanaqin, sheet (NI, 38-7), state company of geological survey and mining –Iraq; 2006.
[6]. Buday.T, Jassim SZ. The regional geology of Iraq, vol.2:Tectonism., Magmatism and metamorphism. Publication of GEOSURV, Baghdad, 1987; 352.
[3]. Lawa FA, Kareem KH, Ali SS. Hydrogeological study of Sulaimaniyah and part of Kirkuk areas, NE Iraq.Part two: Bazian-Sangaw Basin, Surdash-Koya asin, Qaradagh-Kalar Basin. Report, FAO GWU documentation Fund, Erbil; 2002.
[4]. Nabi AQ. Limnological and bacteriological studies on some wells within Hawler city, Kurdistan region, Iraq. M.Sc. Thesis, Univ. of Salahaddin, Hawler; 2005.
[5]. Al-Jibori H. Hydrogeological map of Khanaqin, sheet (NI, 38-7), state company of geological survey and mining –Iraq; 2006.
[6]. Buday.T, Jassim SZ. The regional geology of Iraq, vol.2:Tectonism., Magmatism and metamorphism. Publication of GEOSURV, Baghdad, 1987; 352.
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| Paper Type | : | Research Paper |
| Title | : | Mesoscopic Structural Profile ofa Syn-Tectonic Granite, Southwestern Nigeria |
| Country | : | Nigeria |
| Authors | : | Oden, Michael I.1 and Udinmwen, Efosa |
|
: | 10.9790/0990-02226776 |
Abstract: Pan-African granites from Igarra area in southwestern Nigeria have a mesoscopicstructural profile which includes phenocrysts, xenoliths, joints, veins and different pluton shapes all in interesting orientations. The phenocrysts which are white or pink in colour show a preferred orientation of long axes in the NNW-SSE and N-S directions. The phenocrysts from the porphyritic granites show evidence of an early stage magmatic origin. The metasedimentary xenoliths frozen in these granites are strongly preferentially oriented in the NNW-SSE to N-S direction as well, for reasons related to the tectonics of the region. The xenoliths being poor strain markers are at best useful for inferring the direction of maximum extension.
[1]. Anifowose, A.Y.B, Bamisaye, O.A. and Odeyemi, I.B. (2006). Establishing a Solid Mineral Database for a part of Southwestern Nigeria. Geospatial Application paper. pp 1-3
[2]. Bacon, C. R., Macdonald R., Smith R. L. and Baedecker P. A. (1967) Pleistocene high- silica rhyolites of the Coso Volcanic Field, Inyo country California. Journal of Geophysical Research, 86: 10223-10241.
[3]. Ball, E. (1980). An example of very consistent brittle deformation over a wide intercontinental area: the late Pan-African Fracture system of the Tuareg and Nigerian shield. Tectonophysics, 61, 363-379. http://dx.doi.org/10.1016/0040-1951(80)90240-1.
[4]. Barriere, M. (1977). Deformation associated with the Ploumanac‟h intrusive complex, Brittany. J. Geol. Soc. London, 134; 311-324.
[5]. Bateman, P. C., Clark L. D., Huber N. K., Moore J. G. and Phinehart C. D. (1963). The Sierra Nevada Batholith - a Synthesis of recent works across the central part. U.S. Geol. Surv. prof. pap., 414-D, DI-D46.
[2]. Bacon, C. R., Macdonald R., Smith R. L. and Baedecker P. A. (1967) Pleistocene high- silica rhyolites of the Coso Volcanic Field, Inyo country California. Journal of Geophysical Research, 86: 10223-10241.
[3]. Ball, E. (1980). An example of very consistent brittle deformation over a wide intercontinental area: the late Pan-African Fracture system of the Tuareg and Nigerian shield. Tectonophysics, 61, 363-379. http://dx.doi.org/10.1016/0040-1951(80)90240-1.
[4]. Barriere, M. (1977). Deformation associated with the Ploumanac‟h intrusive complex, Brittany. J. Geol. Soc. London, 134; 311-324.
[5]. Bateman, P. C., Clark L. D., Huber N. K., Moore J. G. and Phinehart C. D. (1963). The Sierra Nevada Batholith - a Synthesis of recent works across the central part. U.S. Geol. Surv. prof. pap., 414-D, DI-D46.
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| Paper Type | : | Research Paper |
| Title | : | Geochemical and Mineralogical Variation Of Hydrothermally Altered Rhyolite At Teerayuth Mine, Ban Laeng, Amphoe Muang, Lampang Province, Thailand |
| Country | : | Thailand |
| Authors | : | Keadsuda Donmuang*, Pongpor Asnachinda, Phisit Limtrakun, Benjavan Rattanasatien, Wittaya Khandarosa |
|
: | 10.9790/0990-02227784 |
Abstract: Different clay samples from Teerayuth Mine, Ban Laeng, Amphoe Muang, Lampang province were analyzed to obtain their mineralogical and chemical characteristics. Each sample was collected from different degree of alteration areas namely low, moderate and high as classified by their physical appearances at the mine faces. The samples were then determined for their geochemical and mineralogical composition. The results show that geochemistry and mineralogy of clays from Teerayuth Mine are varied from place to place. Results of the investigation clearly show the relationship between SiO2 content and the degrees of alteration. A representative sample of low alteration has higher SiO2 content than the high alteration sample.
[1]. Department of Mineral Resources. 2003. Kaolin deposits in Thailand.
[2]. Aranyabhaga, Somboon, 1997. The Lampang China Stone, International conference on Materials, Technology: Recent Development and Future Potential, 9-10 January 1997, at The Empress Hotel, Chiangmai, Thailand.
[3]. Adul Jaitabutr. (2009) Kaolin and Ballclays of Thailand, Department of Mineral Resources.
[4]. Poom-Im, Somchai (1981) Comparison of Genesis and Clay-forming Minerals of Kaolin in North Thailand, Faculty of Sciences, Chiang Mai University.
[5]. Department of Mineral Resources. (1993) The Properties of Chinastone of Lampang.
[6]. Piyasin, S. 1971. Geological map of Changwat Lampang, scale 1:250,000, sheet NE 47-7. Geol. Surv. Div., DMR., Bangkok, Thailand.
[2]. Aranyabhaga, Somboon, 1997. The Lampang China Stone, International conference on Materials, Technology: Recent Development and Future Potential, 9-10 January 1997, at The Empress Hotel, Chiangmai, Thailand.
[3]. Adul Jaitabutr. (2009) Kaolin and Ballclays of Thailand, Department of Mineral Resources.
[4]. Poom-Im, Somchai (1981) Comparison of Genesis and Clay-forming Minerals of Kaolin in North Thailand, Faculty of Sciences, Chiang Mai University.
[5]. Department of Mineral Resources. (1993) The Properties of Chinastone of Lampang.
[6]. Piyasin, S. 1971. Geological map of Changwat Lampang, scale 1:250,000, sheet NE 47-7. Geol. Surv. Div., DMR., Bangkok, Thailand.
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| Paper Type | : | Research Paper |
| Title | : | Enhancing Stream Sediment Geochemical Anomalies Using Spatial Imaging: Case Study from Dagbala and Its Environs |
| Country | : | Nigeria |
| Authors | : | Adiotomre, E. E. |
|
: | 10.9790/0990-02228596 |
Abstract: The exploration for solid minerals is a very demanding and costly operation and exploration techniques are continually modified, with the better data interpretation approach continuously sought after by operators of the solid mineral industry, so as to improve the success rate of mineral deposit discovery. Spatial imaging approach to interpretation of anomalies related to stream sediment geochemical data is increasingly being recognized, as a significant component of the geochemical survey data analysis in the prospect for concealed mineral deposits. It is apparent that the spatial rendering of such data enhances the interpretation of associated anomalies. The present study, therefore, adopts this technique to investigate the regional distribution of five chemical elements (Au, Zn, Pb, Cu, and Ag) in stream sediments derived predominantly from Precambrian Basement rocks in the Dagbala area. Stream sediment samples were analyzed for these elements in bulk fractions with an Atomic Absorption Spectrophotometer after hot extraction with aqua regia. In order to improve the spatial mapping of geochemical anomalies, the computed statistical threshold for the chemical data is used to augment geochemical models developed with Surfer – a contouring and 3-D surface mapping package. Stream sediment concentration data are extrapolated or interpolated at the sample points on stream beds, allowing geochemical anomalies to be aptly extracted for optimal spatial assessment. Geochemical models show anomalies of Ag, Cu, Au, and Zn, while grid vector maps depict the dispersion trend of the elements studied.
Keywords: Dagbala; Geochemical Anomaly;Dispersion trend; Mineralization; Nigeria Basement Complex; Surfer
Keywords: Dagbala; Geochemical Anomaly;Dispersion trend; Mineralization; Nigeria Basement Complex; Surfer
[1]. Adams, D. (2006). Geochemical Sampling and Geostatistics – Notes, Delta Mine Training Center; http://www. dmtcalaska.org/coursedev/explogeo/class12/notes12. html (accessed August 10, 2013).
[2]. Adekeye, J. I. D. (1999). Heavy minerals in stream sediments and their relationship to bedrock types and mineralization in Oro Area Southwestern Nigeria. Nigeria Journal of Pure and Applied Science, vol. 14, pp. 906-914.
[3]. Adepoju, M. O.and Adekoya, J. A. (2011). Reconnaissance geochemical study of a part of Igarra schist belt, southwestern Nigeria. Ife Journal of Science, vol. 13, no. 1, pp. 75-92.
[4]. Adepoju, M. O. andAdekoya, J. A. (2012). Distribution and assessment of heavy metals in sediments of the river Orle, southwestern Nigeria. Journal of Sustainable Development and Environmental Protection, vol. 2, no. 1, pp. 78-97.
[5]. Alexakis, D. (2008). Geochemistry of stream sediments as a tool for assessing contamination by Arsenic, Chromium and other toxic elements: East Attica region, Greece. European Water, vol. 21, no. 22: pp.57-72.
[2]. Adekeye, J. I. D. (1999). Heavy minerals in stream sediments and their relationship to bedrock types and mineralization in Oro Area Southwestern Nigeria. Nigeria Journal of Pure and Applied Science, vol. 14, pp. 906-914.
[3]. Adepoju, M. O.and Adekoya, J. A. (2011). Reconnaissance geochemical study of a part of Igarra schist belt, southwestern Nigeria. Ife Journal of Science, vol. 13, no. 1, pp. 75-92.
[4]. Adepoju, M. O. andAdekoya, J. A. (2012). Distribution and assessment of heavy metals in sediments of the river Orle, southwestern Nigeria. Journal of Sustainable Development and Environmental Protection, vol. 2, no. 1, pp. 78-97.
[5]. Alexakis, D. (2008). Geochemistry of stream sediments as a tool for assessing contamination by Arsenic, Chromium and other toxic elements: East Attica region, Greece. European Water, vol. 21, no. 22: pp.57-72.
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| Paper Type | : | Research Paper |
| Title | : | Geochemistry of Siwana Granites and associated Volcanic Rocks, Barmer District, Rajasthan |
| Country | : | India |
| Authors | : | Dr. Anil Kumar Yadav || Dr. Deva Ram Meghwal |
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: | 10.9790/0990-02020297102 |
Abstract: In a cauldron (subsidence) structure of a huge crater at Siwana, peralkali ne lava flows slope inward. Rie beckite aegirine containing granite has intruded along the crator's edge in three stages. A ring dike resulted fr om the cone intrusion that followed. Alkali amphibole, quartz, aihite, Perthitic K feldspar, and aegirine make up the majority of the alkaline granite's mineral composition. Chemically, the rock has significant alkali concentrations, with a total alkali co ntent of up to 9.36 weight percent. It also contains unusually high levels of Sri, Nb, Zr, Y, La, and Ce. The presence of peralkaline granite at Siwana is a sign of rift related magmatism in a distensional Late Proterozoic crustal regime since peralkalinep lutonism is a prelude to pre rift tectonics.
Keywords: Peralkaline Siwana, Alkali Concentration, K Feldspar etc.
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