AGSO journal of Australian geology & geophysics最新文献_第6页

Geophysical Signature Location in the South-West of Chad: Structural Implications 乍得西南部地球物理特征位置:构造意义

AGSO journal of Australian geology & geophysics Pub Date : 2017-12-15 DOI: 10.4172/2381-8719.1000319

Diponbe Benoit, N. Robert, Kenfack Jean Victor, Momo Tonfack Christian

引用次数: 2

Three Dimensional Modelling of Kharga Reservoir Water, New Valley-Egypt, Using Magnetotelluric Data 利用大地电磁资料对埃及新河谷Kharga水库水进行三维模拟

AGSO journal of Australian geology & geophysics Pub Date : 2017-12-11 DOI: 10.4172/2381-8719.1000318

M. Mahmoud, Arafa Tarek, Amatykul Puwis, A. Magdy, Ogawa Yasuo

{"title":"Three Dimensional Modelling of Kharga Reservoir Water, New Valley-Egypt, Using Magnetotelluric Data","authors":"M. Mahmoud, Arafa Tarek, Amatykul Puwis, A. Magdy, Ogawa Yasuo","doi":"10.4172/2381-8719.1000318","DOIUrl":"https://doi.org/10.4172/2381-8719.1000318","url":null,"abstract":"Most of the Egyptian populations live along the two banks of the Nile River in order to access water for daily needs and other purposes. About 90% of Egyptian territories is a desert with little amount of rainfall. In these arid deserts, groundwater is the only possible source that would support cultivation and civil expansions. Several Oases including Kharga are distributed in the western desert of Egypt, in which the groundwater is the main source of irrigation and daily life. The New-Valley governorate is keen on reclaiming the western desert and developing new urban areas. Previously available boreholes and geological information are used to preliminary evaluate the three dimensional (3D) subsurface structures including the reservoir water and its environment. \u0000In this study we utilize magnetotelluric (MT) recordings to spot more light on the Nubian aquifer of the Kharga Oasis. A 3D-MT inversion is applied using “w3dinvmt” code. The resultant 3D-resistivity indicates a low resistive layer associated with a Quaternary aquifer and extends from the surface down to a depth more than 50 m. Low to moderate resistivity values are found to indicate a deep Cretaceous aquifer defined at depths from 250 m to 500 m. A resistive zone is found to exist between them that can be associated with solidified limestone and phosphate layers. Furthermore, a high resistivity value appears to belong to the basement complex of Precambrian rocks in the Oasis. A constructed 3D-model is well matching with major hydro-geological structure of the Kharga Oasis that has been inferred from previous works.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"1 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2017-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80720983","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

Exploring and Reserve Estimation for Industrial Mineral Potential in Parts of Calabar Area (Ewen/Iwuru/Agbangana Axis) Southern Nigeria 尼日利亚南部Calabar地区(Ewen/ iwuuru /Agbangana轴)部分地区工业矿产潜力勘探与储量估算

AGSO journal of Australian geology & geophysics Pub Date : 2017-11-29 DOI: 10.4172/2381-8719.1000317

Onwe Mkpuma Rock, O. OmononaVictor, E. Abraham

{"title":"Exploring and Reserve Estimation for Industrial Mineral Potential in Parts of Calabar Area (Ewen/Iwuru/Agbangana Axis) Southern Nigeria","authors":"Onwe Mkpuma Rock, O. OmononaVictor, E. Abraham","doi":"10.4172/2381-8719.1000317","DOIUrl":"https://doi.org/10.4172/2381-8719.1000317","url":null,"abstract":"For a developing nation, industrial rocks can be said to be very essential. Limestone and marble are one of the principal raw materials for industrial rocks such as cement manufacture. In Nigeria, Limestone occurs in the sedimentary environment of Benue Trough, Sokoto, Dahomey and Borno (Chad) basins. This Limestone forming environments (shallow coastal marine conditions) appears to have re-occurred several times in the geological history of the basins. The deposits of the Benue trough appear to contain the most economically viable mineral resources including limestone in Nigeria. Nearly all the limestone deposits in the trough are used for industrial purposes such as cement. The Calabar Flank is one the main carbonate province in Nigerian Benue trough. Ibeto Cement Company obtained permit to explore the viability of limestone deposit in some parts of the Calabar flank area for the establishment of a Portland cement production plant. This research evaluated the presence and volumetric analysis of limestone occurrence recovered from core drilling holes in the area on Exploration Licenses (ELs) No. 17373 and part of No. 17374. Prior to subsurface core drilling investigation, surface reconnaissance survey was undertaken. Rockworks 16 software complimented with dilute Hydrochloric acid were used for this evaluation.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"8 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2017-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78655095","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: 2

Assessment of the Combined Effect of Temperature and Time on Calcium and Magnesium Release in Carbonate Rocks, Central Luconia Province, Offshore Sarawak, Malaysia 温度和时间对马来西亚沙捞越中部Luconia省碳酸盐岩钙镁释放的综合影响评价

AGSO journal of Australian geology & geophysics Pub Date : 2017-11-25 DOI: 10.4172/2381-8719.1000316

Y. Ali, E. Padmanabhan, S. Andariamihaja

引用次数: 0

Seismic Risk Zones and Faults Characterization using Geophysical Data 用地球物理数据描述地震危险区和断层

AGSO journal of Australian geology & geophysics Pub Date : 2017-11-03 DOI: 10.4172/2381-8719.1000311

M. Mekkawi, El Sayed A Fergani, Klaled A Abdella

引用次数: 3

Investigating the Occurrence and Capability of Limestone Deposit in Mbiabong Ukwa Area, Near Arochukwu Southeastern Nigeria Using Core Drilling Method 用岩心钻探法研究尼日利亚东南部Arochukwu附近Mbiabong Ukwa地区石灰石矿床的赋存状态和赋存能力

AGSO journal of Australian geology & geophysics Pub Date : 2017-10-25 DOI: 10.4172/2381-8719.1000308

Onwe Mkpuma Rock, Odoh Bridget Ubechu

引用次数: 0

An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga 加蓬Okondja盆地海底一个具有生物多样性组合的Akouemma半球有机大化石群，年代为2.2 Ga

AGSO journal of Australian geology & geophysics Pub Date : 2017-10-02 DOI: 10.4172/2381-8719.1000281

Ambroise Edou-Minko, M. Moussavou, Tomohiko Sato, C. Tchikoundzi, Y. Sawaki, S. NdongOndo, R. Ortega, R. Maire, A. Kaestner, M. MbinaMounguengui, Stéphane Roudeau, G. Fleury, A. Carmona, D. Ph, Makaya Mvoubou, Benjamin Musavu Moussavou, Agondjo Mo, O. Sasaki, S. Maruyama

{"title":"An Akouemma hemisphaeria Organic Macrofossils Colony Hosting Biodiversity Assemblage on the Seafloor of Okondja Basin (Gabon) dated at 2.2 Ga","authors":"Ambroise Edou-Minko, M. Moussavou, Tomohiko Sato, C. Tchikoundzi, Y. Sawaki, S. NdongOndo, R. Ortega, R. Maire, A. Kaestner, M. MbinaMounguengui, Stéphane Roudeau, G. Fleury, A. Carmona, D. Ph, Makaya Mvoubou, Benjamin Musavu Moussavou, Agondjo Mo, O. Sasaki, S. Maruyama","doi":"10.4172/2381-8719.1000281","DOIUrl":"https://doi.org/10.4172/2381-8719.1000281","url":null,"abstract":"A colony of silico-carbonate Akouemma nodules found in Akou River sedimentary formations of the \u0000 Palaeoproterozoic Okondja Basin consists of two groups, spheroidal (ovoid) nodules and elongated nodules. These \u0000 nodules, which consist of two hemispheres separated by a median disc, are composed essentially of micro-quartz \u0000 associated with calcite of extra-polymeric substance (EPS) type, clay minerals, organic carbon and oxides and \u0000 sulphides of iron. They contain tubular microfossils, pluricellular clusters, microorganisms and vesicles, and have \u0000 undergone considerable deformation by mutual lateral compression in tabular beds. They were interpreted as biogenic \u0000 nodules hosting microorganisms. \u0000We provide the following additional supporting evidence: Akouemma nodules exhibit internal fibro-radial fabrics \u0000 initially composed of fibres and carbon particles; the initially well-organized structures are decaying and are in particles \u0000 and fragments that are dispersed in the undeformed siliceous mass. These internal fabrics are strongly highlighted \u0000 by Al- K- (Ti)-rich clay minerals that are often in close association with fibres and carbon particles. They had likely a \u0000 vegetative reproduction by duplication. \u0000We infer that the Akouemma nodules are macrofossils of sessile soft-plastic body organisms. These macrofossils, \u0000 recently dated at 2.2 Ga, are designated “Akouemma hemisphaeria” and bring a new vision to the “large colonial \u0000 organisms” found in the Franceville Basin.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"2 1","pages":"1-21"},"PeriodicalIF":0.0,"publicationDate":"2017-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85208057","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

Origins of Soft-Sediment Deformation Structures from the Batang Paleodammed Lakes in the Upper Jinsha River, SE Tibetan Plateau 青藏高原东南部金沙江上游巴塘古堰塞湖软沉积变形构造成因

AGSO journal of Australian geology & geophysics Pub Date : 2017-09-26 DOI: 10.4172/2381-8719.1000306

Y. Teng, Jian Chen, Z. Cui, Weichao Li, Yan Li

引用次数: 1

U-Pb Zircon Age: Preliminary Data Evaluating the Earth History Recorded by Two Basement Rocks (Granitic Pegmatite and Mica-Schist) in Mamfe Basin (Sw Cameroon, Central Africa) U-Pb锆石年龄:评价Mamfe盆地花岗伟晶岩和云母片岩基岩记录的地球历史的初步资料

AGSO journal of Australian geology & geophysics Pub Date : 2017-09-18 DOI: 10.4172/2381-8719.1000305

Nguo S. Kanouo

{"title":"U-Pb Zircon Age: Preliminary Data Evaluating the Earth History Recorded by Two Basement Rocks (Granitic Pegmatite and Mica-Schist) in Mamfe Basin (Sw Cameroon, Central Africa)","authors":"Nguo S. Kanouo","doi":"10.4172/2381-8719.1000305","DOIUrl":"https://doi.org/10.4172/2381-8719.1000305","url":null,"abstract":"Zircon crystals from two basement rocks (granitic pegmatite and mica-schist) in the Mamfe Basin were studied to provide petrogenetic and geochronologic constraints, therefore were characterized and dated by LA-Q-ICP-MS analytical techniques, after their internal textural features were determined. Zircon crystals with oscillatory zoning from the granitic pegmatite exceed 200 μm are mainly euhedral to prismatic. The U (≤ 169 ppm), Th (≤ 240 ppm), and Th/U (0.6-1.7) are within the range of zircon crystallized in crustal magmatic environment. The 206Pb/238U ages (506 ± 11 to 639 ± 25 Ma) and 207Pb/235U (490 ± 13 to 653 ± 29 Ma) date Early Precambrian (Early Neoproterozoic: Edicaran) to Cambrian event. They are close to the age of rocks crystallized during the Pan-African collision found within the Cameroon Mobile Belt. Zircon crystals from the mica-schist are 200 μm in size, have magmatic (e.g., euhedral prismatic with oscillatory zone) and metamorphic (e.g., form round soccer ball, sub-hedral with overgrowth) features. The U (23-687 ppm), Th (4.0-161 ppm), and Th/U (0.01-1.8) are compatible with values in metamorphic and magmatic zircon crystallized within crustal environment. The highly heterogeneous 206Pb/238U (543 ± 12 - 2019 ± 30 Ma) and 207Pb/235U (526 ± 12 – 2008 ± 18Ma) mainly date Paleoproterozoic, Mesoproterozoic, and Neoproterozoic magmatic and/or metamorphic events.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"8 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2017-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80763914","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: 6

Active Structures in Central Upper Rhine Graben, SW Germany: New Data from Landau Area using Electromagnetic Radiation (EMR) Technique and Cerescope 德国西南上莱茵地堑中部的活动构造:利用电磁辐射技术和望远镜在朗道地区获得的新数据

AGSO journal of Australian geology & geophysics Pub Date : 2017-09-05 DOI: 10.4172/2381-8719.1000303

W. Hagag, H. Obermeyer

{"title":"Active Structures in Central Upper Rhine Graben, SW Germany: New Data from Landau Area using Electromagnetic Radiation (EMR) Technique and Cerescope","authors":"W. Hagag, H. Obermeyer","doi":"10.4172/2381-8719.1000303","DOIUrl":"https://doi.org/10.4172/2381-8719.1000303","url":null,"abstract":"Two conjugate sets of active faults oriented NNE-SSW and NNW-SSE have been detected at Landau area in SW Germany. These faults follow the old trends of the rift-related structures predominating in the Upper Rhine Graben (URG), which originated during Late Eocene-Miocene time. Linear and horizontal measurements were performed by using the Cerescope device and interpreted, applying the Electromagnetic Radiation (EMR) Technique. Linear EMRprofiles were helpful for mapping active faults, while the main horizontal stress (σH, N to NNE) was easily identified with EMR-horizontal measurements. Reactivation of rift-related structures of the Upper Rhine Graben at Landau area produces a new system of active shallow fractures following old trends, and has been detected through the present study by Cerescope applying the EMR-Technique. The present results imply that the Enhanced Geothermal System (EGS) to the south of Landau has a great impact on reactivation of the pre-existing rift-related faults by mechanical hydro-fracturing occurring within the reservoir rocks underneath the area.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"32 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2017-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74287721","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