AGSO journal of Australian geology & geophysics最新文献_第7页

Micromechanical Analysis of Compaction and Drilling of Granular Media- A Review 颗粒介质压实和钻孔的微观力学分析综述

AGSO journal of Australian geology & geophysics Pub Date : 2017-08-08 DOI: 10.4172/2381-8719.1000302

O. Okorie

引用次数: 1

Petrology, Diagenesis and Reservoir Quality in the Hawkesbury Sandstone,Southern Sydney Basin, Australia 澳大利亚南悉尼盆地Hawkesbury砂岩岩石学、成岩作用及储层物性

AGSO journal of Australian geology & geophysics Pub Date : 2017-08-03 DOI: 10.4172/2381-8719.1000283

F. Algahtani

{"title":"Petrology, Diagenesis and Reservoir Quality in the Hawkesbury Sandstone,Southern Sydney Basin, Australia","authors":"F. Algahtani","doi":"10.4172/2381-8719.1000283","DOIUrl":"https://doi.org/10.4172/2381-8719.1000283","url":null,"abstract":"Petrography of the Hawkesbury Sandstone was described by thin section, scanning electron microscope and Xray diffraction techniques. Quartz is dominant in the Hawkesbury Sandstone which contains very minor feldspar, lithic grains, mica and heavy minerals. The Hawkesbury Sandstone is quartzarenite to sublitharenite. Quartz includes monocrystalline and polycrystalline grains while the feldspar includes both K-feldspar and plagioclase. Volcanic, sedimentary and chert rock fragments are present. Thin section porosity occurs in the Hawkesbury Sandstone, particularly the coarse-grained deposits. Primary porosity is more common than secondary porosity in the Hawkesbury Sandstone. Thin sections and scanning electron microscopy were used to describe diagenetic alterations and their influence on porosity in Hawkesbury Sandstone. These diagenetic alterations include compaction, quartz overgrowths, authigenicclay minerals and carbonate cement. Compaction occurred in the Hawkesbury Sandstoneduring throughout diagenesis. The influence of chemical compaction on thin section porosity was greater in the Hawkesbury Sandstone. Quartz overgrowths are common in the Hawkesbury Sandstone where they have a strong influence on porosity. Authigenic clay minerals are the widespread in the Hawkesbury Sandstone filling pores and occurring as grain-coatings on detrital and authigenic grains. Where they coat quartz grains they preserve porosity by preventing growth of quartz overgrowths. Pore-filling carbonate cement reduced porosity whereas dissolution of carbonate resulted in secondary porosity. Dissolution of unstable feldspar and lithic grains is absent in the Hawkesbury Sandstone. The Hawkesbury Sandstone is characterized by primary and secondary porosity, thus it has good groundwater storage and flow potential. Medium- and coarse-grained sandstone beds are common in the Hawkesbury Sandstone but it shows vertical variations in porosity. A few impermeable shale and siltstone units occur in the Hawkesbury Sandstone forming local confining layers.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"41 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2017-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73870936","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

A Study of Earthquakes in Bangladesh and the Data Analysis of the Earthquakes that were generated In Bangladesh and ItsÃ¢Â€Â™ Very Close Regions for the Last Forty Years (1976-2016) 孟加拉国地震研究和过去40年(1976-2016)孟加拉国和ItsÃ¢Â€Â™非常接近区域地震的数据分析

AGSO journal of Australian geology & geophysics Pub Date : 2017-07-28 DOI: 10.4172/2381-8719.1000300

Md. Abdullah Al Zaman, N. J. Monira

引用次数: 18

Petro-geochemistry, Genesis and Economic Aspects of Mafic Volcanic Rocks in the West and Southern Part of The Mamfe Basin (SW Cameroon, Central Africa) 中非喀麦隆西南部Mamfe盆地西部和南部基性火山岩的岩石地球化学、成因及经济意义

AGSO journal of Australian geology & geophysics Pub Date : 2017-07-25 DOI: 10.4172/2381-8719.1000298

Nguo S. Kanouo, R. Yongue, T. Ghogomu, E. Njonfang, Syprien Bovari Yomeun, Emmanuel Archelaus Afanga Basua

{"title":"Petro-geochemistry, Genesis and Economic Aspects of Mafic Volcanic Rocks in the West and Southern Part of The Mamfe Basin (SW Cameroon, Central Africa)","authors":"Nguo S. Kanouo, R. Yongue, T. Ghogomu, E. Njonfang, Syprien Bovari Yomeun, Emmanuel Archelaus Afanga Basua","doi":"10.4172/2381-8719.1000298","DOIUrl":"https://doi.org/10.4172/2381-8719.1000298","url":null,"abstract":"Geologic prospecting, petrographic and geochemical analyses of mafic volcanic exposures in the west and southern part of the Mamfe Basin (SW Cameroon) distinguishes: basanites, picro-basalts, alkali basalts and tholeiitic basalts. They are relatively LREE-enriched, undersaturated, saturated or oversaturated due to presence or absence of normative nepheline, hypersthene or quartz. Basanites mainly form pillow-like lavas, and are aphyric or porphyritic. They have significant concentration of Ni (up to 387 ppm) and Ba (up to 436 ppm). These alkaline rocks cooled from less evolved mantle source magma. Picro-basaltic fragments exclusively found in the western part of the basin are Ni (up to 259 ppm) Ba (up to 2090 ppm) -enriched porphyritic, alkaline or subalkaline rocks. They also cooled from less evolved mantle source magma. Basalts form volcanoclasts, flow and dykes. They are aphyric or porphyritic, alkaline, transitional or subalkaline. Some of these rocks are Al-enriched. They crystallized from variably evolved mantle source magma within the Oceanic Island Basalt and Continental Rift Basalt tectonic settings.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"23 17 1","pages":"1-17"},"PeriodicalIF":0.0,"publicationDate":"2017-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80164246","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

Petrography, geochemistry and Alteration Studies of Kanawa Uranium Occurrences, Wuyo-Gubrunde Horst, Northeastern Nigeria 尼日利亚东北部Wuyo-Gubrunde Horst Kanawa铀矿床的岩石学、地球化学及蚀变研究

AGSO journal of Australian geology & geophysics Pub Date : 2017-07-19 DOI: 10.4172/2381-8719.1000297

S. I. Bute

引用次数: 3

Long-term Pumping Test and Ert to Visualize Hydrogeologic Barriers in Heterogeneous and Karstic Coastal Aquifers 长期抽水试验和可视化非均质岩溶海岸含水层水文地质屏障的方法

AGSO journal of Australian geology & geophysics Pub Date : 2017-07-09 DOI: 10.4172/2381-8719.1000304

M. C. Caputo, L. Decarlo, R. Masciale, C. Masciopinto

{"title":"Long-term Pumping Test and Ert to Visualize Hydrogeologic Barriers in Heterogeneous and Karstic Coastal Aquifers","authors":"M. C. Caputo, L. Decarlo, R. Masciale, C. Masciopinto","doi":"10.4172/2381-8719.1000304","DOIUrl":"https://doi.org/10.4172/2381-8719.1000304","url":null,"abstract":"In coastal areas, groundwater may represent the main resource for human needs. The over-exploitation of coastal aquifers could cause seawater intrusion that induces depletion both in quality and quantity of the water resource, with no negligible environmental impacts. Moreover, locally geological heterogeneities of the aquifer can affect the flow and transport processes. In such cases, an integrated hydro-geophysical approach could provide useful information to evaluate the response of the aquifer and to estimate changes in the main hydraulic parameters such as transmissivity and permeability. In this study Electrical Resistivity Tomography (ERT) survey combined with traditional techniques of measuring the main groundwater parameters have been performed to assess the hydrogeological properties of a coastal heterogeneous aquifer. The conventional interpretation of pumping test drawdown allowed to detect a hydraulic barrier located to a specific distance with respect to the pumping well; furthermore, the transmissivity of the portion of aquifer involved in the pumping and the corresponding changes of its hydraulic conductivity due to the presence of the barrier has been estimated. Confirming the conventional interpretation of the pumping test drawdowns, the ERT image was able to locate the hydraulic barrier over space, visualizing a high resistive body, located below the water table.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"61 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2017-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80625330","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

Characteristics of Cordierite (Iolite) of Bandarguha-Orabahala Area, Kalahandi District, Odisha, India 印度奥里萨邦Kalahandi地区bandaguha - orabahala地区堇青石(青石)特征

AGSO journal of Australian geology & geophysics Pub Date : 2017-06-30 DOI: 10.4172/2381-8719.1000294

D. Sk, Mohanty Jk

引用次数: 3

Acoustic Logging Methods in Fractured and Porous Formations 裂缝和多孔地层的声波测井方法

AGSO journal of Australian geology & geophysics Pub Date : 2017-06-08 DOI: 10.4172/2381-8719.1000293

S. Al-Obaidi, Khalaf Fh

引用次数: 1

Natural Vulnerability Estimate of Groundwater Resources in the Coastal Area of Ibaka Community, Using Dar Zarrouk Geoelectrical Parameters 基于Dar Zarrouk地电参数的Ibaka社区沿海地区地下水资源自然脆弱性评价

AGSO journal of Australian geology & geophysics Pub Date : 2017-05-30 DOI: 10.4172/2381-8719.1000295

Evans Uf, A. Nn, A. Mallam

{"title":"Natural Vulnerability Estimate of Groundwater Resources in the Coastal Area of Ibaka Community, Using Dar Zarrouk Geoelectrical Parameters","authors":"Evans Uf, A. Nn, A. Mallam","doi":"10.4172/2381-8719.1000295","DOIUrl":"https://doi.org/10.4172/2381-8719.1000295","url":null,"abstract":"The study is aimed at estimating the natural vulnerability of groundwater resources using Dar Zarrouk geoelectrical parameters. Hence, ground-based earth resistance measuring device (OYO McOHM resistivity meter, Model 2115A) and its accessories were deployed for the study. 15 Schlumberger vertical electrical soundings (VES) points distributed along three profiles within the Mbo plain area were conducted. The VES field data were interpreted manually on bilogarithmic plot and then by applying the auxiliary point-partial resistivity curve matching technique. The interpretation was enhanced by sophisticated computer software (IPI2Win). The Dar Zarrouk geoelectrical parameters were deduced from the advanced interpreted results and use to produce contour maps. The lithology identified was of sands sequence of different grain sizes for aquifer zone. The absence of clay formation in the lithology log and low resistivity value (21.49 Ωm) at aquifer’s depth within the VES 5 column suggested saline water ingress. The low range of overburden thickness lies between 0.3 and 4.6 m. The associated overburden longitudinal conductance was found to range from 0.000 to 0.019 Siemens, which was generally low. Therefore, suggesting that groundwater resources in the study area are vulnerable to contamination. Hence, aquifers in the study area were considered to be at high risk of contamination from environmental activities and saline water ingress. The information from study could help in the planning, monitoring and management of potable water supply and development in deltaic coastal aquifer system.","PeriodicalId":80381,"journal":{"name":"AGSO journal of Australian geology & geophysics","volume":"2 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2017-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89770951","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: 3

The Use of Surface Waves in Geotechnical Engineering, which Future? 表面波在岩土工程中的应用前景如何?

AGSO journal of Australian geology & geophysics Pub Date : 2017-05-29 DOI: 10.4172/2381-8719.1000E122

J. Boaga

引用次数: 1