AGSO journal of Australian geology & geophysics最新文献_第2页

Interpretation of Aeromagnetic and Satellite Data over Part of Maru Schist Belt, Northwestern Nigeria 尼日利亚西北部Maru片岩带部分地区航磁和卫星资料的解释

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.4172/2381-8719.1000457

O JosephOsumeje, Oniku As, M. Oc, M MatthewOgwuche, A. Usman

引用次数: 1

New Insights from Gravity Data on the Geodynamic Evolution of Northern African Passive Margin, Case Study of the Tajerouine Area (Northern Tunisian Atlas) 重力数据对北非被动边缘地球动力学演化的新认识——以突尼斯北部塔杰鲁因地区为例

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.4172/2381-8719.1000454

M. Hicheri, B. Ramdhane, S. Yahyaoui, T. Gonenc

{"title":"New Insights from Gravity Data on the Geodynamic Evolution of Northern African Passive Margin, Case Study of the Tajerouine Area (Northern Tunisian Atlas)","authors":"M. Hicheri, B. Ramdhane, S. Yahyaoui, T. Gonenc","doi":"10.4172/2381-8719.1000454","DOIUrl":"https://doi.org/10.4172/2381-8719.1000454","url":null,"abstract":"In Northern Tunisia, geological structuring is very diverse. This diversification is due to its localization, which is situated within the convergence zone between Africa and Eurasia plates. This situation allows to a complicated geodynamic evolution from Permian Tethy’s opening to the quaternary. Our study area is a key zone because we find several structures (Triassic extrusions, reefs, folds, grabens). The Surface studies (structural, sedimentology, etc.) leave controversies and many directions are only indicated as supposed faults. Thus, to understand geodynamic evolution is very important for petroleum and mining exploration. For this purpose geophysical method, which corresponds to a gravity data interpretation, is used to explore the subsurface structures. In this study, different techniques (regionalresidual separation, Horizontal gradient magnitude, upward continuation, Euler DE convolution) were applied to the gravity anomaly map. The results obtained allowed to draw up a structural map showing faults system responsible for structuring the study area. The obtained structural map is consistent with several faults already identified in previous studies and shows new directions. This map leads to better understanding the geological structures and the geodynamic evolution of the region and is a very useful document to guide future mining and hydrocarbons operations research.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87261826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Joint Application of Geophysical Techniques for Engineering Site Characterization of Samara University Area, Ethiopia 地球物理技术在埃塞俄比亚萨马拉大学地区工程场地表征中的联合应用

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.35248/2381-8719.19.8.467

Solomun Atsbahaa, Hindeya Gebrub, Tigistu Haileb, Anteneh Legessec

{"title":"Joint Application of Geophysical Techniques for Engineering Site Characterization of Samara University Area, Ethiopia","authors":"Solomun Atsbahaa, Hindeya Gebrub, Tigistu Haileb, Anteneh Legessec","doi":"10.35248/2381-8719.19.8.467","DOIUrl":"https://doi.org/10.35248/2381-8719.19.8.467","url":null,"abstract":"2D electrical resistivity imaging, vertical electrical sounding and magnetic methods have been conducted for site characterization for large building foundations at Samara University, one of the emerging institutions of learning in Ethiopia. The main objective of the study was to examine the suitability of the subsurface geological formations and structures for foundation on the on-going construction and future expansion of the university. From the results of the survey, it has been possible to map the stratification of the subsurface layers, areas of weakness in the subsurface and the vertical as well as lateral extents of the different lithologies. Moreover, the depth to the substratum suitable for foundation is determined. From interpretation of the geophysical survey results, the near surface geology of the study area includes three layers: a first layer, which is the top soil having considerably varying thickness over the area; a second layer which is interpreted as a layer of vesicular basalt which is the best lithology for the foundation purpose. This layer extends to depth of about 6 m on the north and eastern parts of the area whereas it goes up to 11 m depth on the south and south-western part of the survey area. The third layer which is characterized by very low apparent resistivity response is interpreted as weathered basalt and clay. From a combined interpretation of the geophysical data, three weak zones have been identified over the survey area. Out of these one is oriented N-S while the other two are oriented in a near NW-SE direction. From all the above interpretations, it was possible to suggest that the university must expand towards the northern part of the campus compound. Moreover, special considerations should be taken during designing and implementation of buildings in the eastern and southern part of the area, where the weak zones detrimental to foundation of large buildings are mapped.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"19 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84157811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Integrated Seismic Interpretation, 2D Modeling along with Petrophysical and Seismic Attribute Analysis to Decipher the Hydrocarbon Potential of Missakeswal Area, Pakistan 综合地震解释、二维建模以及岩石物理和地震属性分析来破译巴基斯坦Missakeswal地区的油气潜力

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.4172/2381-8719.1000455

A. Abbas, Hongtao Zhu, A. Anees, U. Ashraf, N. Akhtar

{"title":"Integrated Seismic Interpretation, 2D Modeling along with Petrophysical and Seismic Attribute Analysis to Decipher the Hydrocarbon Potential of Missakeswal Area, Pakistan","authors":"A. Abbas, Hongtao Zhu, A. Anees, U. Ashraf, N. Akhtar","doi":"10.4172/2381-8719.1000455","DOIUrl":"https://doi.org/10.4172/2381-8719.1000455","url":null,"abstract":"Missakeswal is an important hydrocarbon field, lying on active foreland fold and thrust belt of Himalayan orogeny in Potwar plateau. Integrated study of 2D seismic data (SEG-Y, Navigation and seismic velocities) and well logs helps us to delineate the potential reservoir rock of the area. Seismic interpretation based on stratigraphic studies and well tops, aids to mark four reflectors; Chorgali, Sakesar, Lockhart and Basement. Time sections are converted to depth section using velocity analysis system to delineate subsurface structure. Besides this, fault-bounded anticlines and crustal shortening analysis of the depth sections, revealed that folding in the sedimentary successions pre-date reverse faulting and regime of the Potwar basin, is suitable for hydrocarbon accumulation. 2D modeling of the interpreted seismic sections confirms reverse faulting in the sedimentary successions and normal faulting in the basement. Moreover, Seismic Attributes Analysis has carried out which helps in understanding the lateral continuity, bedding sequences and thickness of desired beds highlighted the petroleum system and affirmed the interpretation. The identified structural variations would help in the understanding of the regional tectonic settings, besides this, reservoir character in terms of lateral thickness variation, fault offsets and lithological dissimilarities are achieved. It also reveals that carbonate successions of the Sakesar and Chorgali formations acted as potential reservoirs in Missakeswal area.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75647572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

New Findings of the Cenomanian-Turonian Successions in the Quseir Region, Red Sea, Egypt 埃及红海Quseir地区塞诺曼尼亚-土鲁尼亚演替的新发现

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.35248/2381-8719.19.8.465

R. M. E. Gammal, O. Orabi

引用次数: 2

Adopting Geo-electric Approach in Mineral Characterization of Iyamitet Settlement 地电法在岩斑岩沉降物表征中的应用

AGSO journal of Australian geology & geophysics Pub Date : 2019-01-01 DOI: 10.35248/2381-8719.19.8.466

A. As, Dikedi Pn, Oghar, ukun Mo

{"title":"Adopting Geo-electric Approach in Mineral Characterization of Iyamitet Settlement","authors":"A. As, Dikedi Pn, Oghar, ukun Mo","doi":"10.35248/2381-8719.19.8.466","DOIUrl":"https://doi.org/10.35248/2381-8719.19.8.466","url":null,"abstract":"The research work epicenters on the delineation of Barite-Galena sediments within Iyamitet settlement of Obrubra region, Present work has become necessary owing to the growing need for the Nigeria and indeed world economy to be funded from proceeds of mineral ores as an alternative source of regional and global revenues. The ore garners some global economic value and importance. In delineating the region which habours the mineral ore, geo-electricity was introduced into the subsurface by employing a pair of current electrodes while the voltage is measured by inserting another pair of potential electrodes. Shlumberger array and Vertical Electrical Sounding (VES) techniques were adopted to measure apparent ground resistivity of the subsurface under investigation. Eighteen Vertical Electrical Sounding Curves, five geo-sections, five Isoresistivity and four Isopach maps were generated respectively. Since mineral-ores (Barite and Galena) are located within the host rocks, all 18 VES results represented in 18 tables show varied depths to these ores--and the rocks which harbours them.. The Iso-resistivity map with red patches bearing resistivities over 1000 Ωm demonstrates potential for Barite which coincide with varying depth of (10-15) m as revealed by the coring and borehole information. The Iso-pach map with the lightest patch represents highest altitude of the area under investigation. The dark blue patch represents the lowest portion of the region under investigation. Though results do not show the presence of Galena ore material, it is possible that multiple ore intrusions could have compromised the resistivity reading of Galena; Galena presence could be uncovered by combining outcome of results from multiple geophysical techniques","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"59 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87418091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Delineation and Correlation of Lineaments Using Landsat-7 ETM+, DEM and Aeromagnetic Datasets: Basement Complex of Shanono, Northwestern Nigeria 基于Landsat-7 ETM+、DEM和航磁数据的地形特征圈定与对比:尼日利亚西北部Shanono基底杂岩

AGSO journal of Australian geology & geophysics Pub Date : 2018-06-10 DOI: 10.4172/2381-8719.1000445

Abdul Malik Nf, I. Garba, D. Ua, H. Hamza

{"title":"Delineation and Correlation of Lineaments Using Landsat-7 ETM+, DEM and Aeromagnetic Datasets: Basement Complex of Shanono, Northwestern Nigeria","authors":"Abdul Malik Nf, I. Garba, D. Ua, H. Hamza","doi":"10.4172/2381-8719.1000445","DOIUrl":"https://doi.org/10.4172/2381-8719.1000445","url":null,"abstract":"An integration of Landsat-7 ETM+, DEM and aeromagnetic datasets was used for basic surficial geologic mapping of the area of study. False colour composite and principle component analysis were derived from three separate bands each with same spatial resolution of 30 m, superimposed over one another. Visible and infra-red waves of the electromagnetic spectrum were sent out to the surface/near surface and the received impulses reveal areas with varying magnetic susceptibilities, displayed on the first vertical derivative map and areas that emitted ranges of heat radiation signatures, displayed on the analytical signal map. Lineaments were conversely extracted from these maps over an area of about 770 km2. These lineaments represent fractures, faults, discontinuous quartz ridges, river channels, trenches and furrows in field. The eastern major fracture is the Kalangai major fault trending NE-SW. However, a possible presence of a mega fracture structurally controls River Karaduwa with other tributaries trending NW-SE, almost N-S. Part of the area also possesses gold mineralization potentials along the deep seated Kalangai major fault. The lineaments yielded from both datasets were integrated and showed a coincide results of the rate of deformation that most have affected the area to be of brittle/ductile form. The aeromagnetic data exhibits evidence of near surface fractures while the remote sensing data revealed more of surface fractures. Rose plots where inculcated and showed the dominant trend directions of the lineaments to be NE-SW and NW-SE.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"16 7","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2018-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4172/2381-8719.1000445","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72449406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Spatial Assessment of the Textural Characteristics and Sorting of Beach Deposits on the Barrier Lagoon Coastal Complex, Lagos Nigeria 尼日利亚拉各斯堰洲泻湖海岸复合体海滩沉积物结构特征和分选的空间评价

AGSO journal of Australian geology & geophysics Pub Date : 2018-04-12 DOI: 10.4172/2381-8719.1000334

M. I. Titocan, M. Ibitola, B. Faleye, Akinade-Solomon Oc

{"title":"Spatial Assessment of the Textural Characteristics and Sorting of Beach Deposits on the Barrier Lagoon Coastal Complex, Lagos Nigeria","authors":"M. I. Titocan, M. Ibitola, B. Faleye, Akinade-Solomon Oc","doi":"10.4172/2381-8719.1000334","DOIUrl":"https://doi.org/10.4172/2381-8719.1000334","url":null,"abstract":"The textural characteristics and sorting of the beach deposits on the Lagos barrier lagoon coastal complex was determined using grain size analysis of sediments. Fifty sediment samples were collected from five beaches namely Seme, Yovoyan, Lekki, Okun-Ajah and Orimedu. Inclusive mean and the inclusive standard deviation (sorting) were used to spatially assess the textural characteristics and sorting of sediment grain size so as to determine the prevailing wave energy level traversing the beaches and their significant variations at each beach using analysis of variance. The textural characteristics for the beaches showed dominantly coarse sands, moderately sorted sediments along the waterline, while medium sands, moderately well sorted sediments were found at the berm of the five beaches. The cross-shore profile of the beaches gave a dynamic system with moderately high wave energy between the waterline and the berm which affects the swash and backwash sediment grain size. Analysis of variance and post-hoc multiple comparisons according to Tukey-Kramer critical value was adopted to assess the spatial variations of the descriptive statistics and consequently, the wave energy level. The inclusive mean and the inclusive standard deviation were significantly different between the pairs of Seme and Okun-Ajah beaches in terms of textural characteristics and between the pairs of Seme and Yovoyan beaches in terms of sorting, accounting for the spatial variation in the descriptive statistics and thus the wave energy level between the beaches showing greater impacts with high wave energy level on Yovoyan and Okun-Ajah beaches than Seme beach due to their textural compositions. However, the hydrodynamic forces of the ocean were responsible for the moderately high wave energy level that traverses the beaches, making it unequivocal that the beaches on this barrier lagoon coastal complex are susceptible to coastal erosion.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"26 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78210865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Vulnerability Assessment of Groundwater to Contamination Using Electrical Resistivity Method at the Open Dumpsite in Gosa, Abuja, Nigeria 利用电阻率法评价尼日利亚阿布贾戈萨露天垃圾场地下水对污染的脆弱性

AGSO journal of Australian geology & geophysics Pub Date : 2018-02-22 DOI: 10.4172/2381-8719.1000329

L. AkpanMorgan, Mallam Abu, A. Nasir

{"title":"Vulnerability Assessment of Groundwater to Contamination Using Electrical Resistivity Method at the Open Dumpsite in Gosa, Abuja, Nigeria","authors":"L. AkpanMorgan, Mallam Abu, A. Nasir","doi":"10.4172/2381-8719.1000329","DOIUrl":"https://doi.org/10.4172/2381-8719.1000329","url":null,"abstract":"Electrical resistivity method was used to investigate the open dumpsite at Gosa, Abuja in order to determine the vulnerability of the groundwater in the area as well as the surrounding environment to leachate contamination. A total of sixteen (16) vertical electrical sounding points with maximum current electrode of 100 m were investigated. The data were analyzed and used to establish the parameters required to fulfil the objectives of this research. A maximum of four geoelectric sections were identified in the area. They included sandy topsoil, clayey sand, weathered basement and fractured/fresh basement. Apparent resistivity values obtained for the four layers delineated were between 64.6 Ωm and 215.5 Ωm for the first layer; 19.0 Ωm and 295.6 Ωm for the second layer; 66.9 Ωm and 1003.7 Ωm for the third layer; and 438.0 Ωm and 1719.9 Ωm for the fourth layer. Furthermore, the ranges of the thickness of the layers were found to be 0.7 m and 12.9 m for the first layer; 1.3 m and 9.8 m for the second layer; and 1.6 m and 11.6 m for the third layer. The depths of water table in the area were estimated to range between 2.1 and 21.6 m. The parameters used in characterizing the aquifer protective capacity of the overburden units were layer thickness and their corresponding resistivity values. Accordingly, the total longitudinal layer conductance of the overburden of the area was generally found to be low, ranging between 0.014 mhos and 0.063 mhos, implying that the aquifer protective capacity of the area is poor. The 1D resistivity cross section for the three profiles investigated exposed the movement of contaminants toward the aquifer, further validating the fact that the aquifer is not protected. The low protective capacity of the area aided the conclusion that the water aquifer in the area was highly vulnerable to leachate contamination from the dumpsite.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"285 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2018-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76869400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

The Effects of Hydro Confining Pressure on the Flow Properties of Sandstone and Carbonate Rocks 水围压对砂岩和碳酸盐岩流动特性的影响

AGSO journal of Australian geology & geophysics Pub Date : 2018-02-12 DOI: 10.4172/2381-8719.1000327

H. SudadAlObaidi, H. FalahKhalaf

引用次数: 0