Geology Articles

  • Hydraulic pile breaker joins construction of Jinmen Bridge

    Taiwan's Jinmen Bridge cross-sea bridge is about 4.7 kilometers long, with a budget of about 9.1 billion yuan. The Taiwan Administration's approved plan for 1995 and the 2004 Economic Development Association agreed to the construction plan of the Golden Gate Bridge proposed by the Ministry of Communications   Now, the big and small Golden Gates need to use the traffic boat, 30 minutes, and ...

  • Hydraulic pile breaker joins construction of Jinmen Bridge

    Taiwan's Jinmen Bridge cross-sea bridge is about 4.7 kilometers long, with a budget of about 9.1 billion yuan. The Taiwan Administration's approved plan for 1995 and the 2004 Economic Development Association agreed to the construction plan of the Golden Gate Bridge proposed by the Ministry of Communications.   Now, the big and small Golden Gates need to use the traffic boat, 30 minutes, and ...


    By lydite trading company

  • Colombian oil revival hopes face electoral test

    An upcoming election and auction round will help determine the country's oil fortunes The outcome of Colombia's election next week is being watched closely as the country attempts to reverse its sliding oil fortunes, which have suffered since the downturn started in late 2014. Colombians will head to the polls to choose a successor to Juan Manuel Santos on 27 May for the ...


    By Petroleum Economist Ltd

  • Quantitative Analysis of Geological Samples- X-Calibur

    Abstract Quantitative and qualitative analysis of geological samples (rocks and river sediments) was performed on Xenemetrix EDXRF Benchtop Spectrometer System, model X-Calibur  Objective: Perform XRF measurements on certified geological reference materials to build calibration curves for the major oxides (Na2O, MgO, SiO2, Al2O3, SiO2, P2O5, ...


    By Xenemetrix Ltd.

  • Fault Surfaces in Earth Volumetric Studio

    There are normally two reasons to create fault surfaces in EVS.  We either just want to display them, or we want to use them to create fault blocks as part of a more complex geologic model.  When we create fault blocks, we are using the surf_cut module and the fault surface is input to the right input port.  There are three main cases to consider with respect to the creation of ...

  • Examining the benefits of HDPE geomembrane

    Comparing various geomembranes for your next geosynthetic application? Don’t overlook high-density polyethylene (HDPE) geomembrane. HDPE has been in use for decades and during that time a number of studies have been conducted to test its longevity and ability to meet environmental sustainability project requirements. Here, we explore some of those studies to examine the benefits of HDPE ...


    By Agru America, Inc.

  • LARGEST U.S. OIL & GAS SOURCE DISCOVERED – NO MOTIVATION TO GET IT

    On November 15th, the United States Geological Survey (USGS) assessed that Texas’s Wolfcamp shale contains an estimated 20 billion barrels of oil, and 1.6 billion barrels of natural gas liquids.  These figures elevate Wolfcamp to being the largest assessment of continuous oil discovered in US history—serving as yet another reminder that even areas that have already yielded ...

  • Mapping sedimentation features in an alluvial valley

    Sediments of the Rhone river are characterized by strong heterogeneity between clay, sand and gravel units. To map these units, we employed an electromagnetic instrument (DualEM421). This instrument das the advantage that no contact to the ground is required and it can be carried on foot. With the interpreted data it was possible to map different geologic units to a depth of up to 4.5m. ...


    By Geo2X

  • Case Study - 28 MW Dual-Flash Power Plant

    Brady Hot Springs, Nevada, USA – 1992 GDA was a partial owner in this successful project and was responsible for exploration and development of the resource. As Manager of Wellfield Development, GDA recommended the comprehensive wellfield development plan, formulated the exploration program, supervised surface geological mapping and geophysical surveys for siting production and injection ...

  • Mineral Exploration in Colombia - Case Study

    Our clients used AGI tools to explore a site of volcanic rocks in order to locate areas of raw material of pozzolan (volcanic ash), which can be mined and sold for profit. Process Our clients used SuperSting R1 for imaging to survey the subsurface of the site in 2D slices in terms of resistivity. They used a Wenner ...


    By Advanced Geosciences, Inc.

  • EQuIS as the Key to Unlocking the Potential of Data - Case Study

    Polycyclic Aromatic Hydrocarbon (PAH) History Reilly Tar and Chemical 80 acre property, operated 1917-1972 Coal tar and distilled by-products discharged to ditch and peat bog through 1939 Onsite industrial well with leaky casing PAH History Reilly Tar and Chemical 1934 the city’s first water supply well ...


    By EarthSoft, Inc

  • Assessment of water quality in Little Vermillion River watershed using principal component and nearest neighbor analyses

    Because of increased use of fertilizers to feed the increasing global population, the nutrient loads in surface and subsurface water have increased substantially in the last few decades. Many studies have been conducted to investigate the factors affecting nitrate load in surface and subsurface flow. The objective of this study is to investigate the relationship between the various factors ...


    By IWA Publishing

  • An approach to assess risks of carbon geological storage technology

    Carbon geological storage (CGS) projects are designed to securely store carbon dioxide (CO2) for thousands of years. Because of this, there are several studies to evaluate the potential risks of long–term storage of CO2 in geological formations. This paper presents a new method for the qualitative risk assessment of CGS: the risk ...


    By Inderscience Publishers

  • The support stability mechanism in dip direction of fully mechanised working face with big dip angle considering the strike angle

    The 'support - surrounding rock' mechanical model has been set up to solve the stability control problem of fully mechanized working face (FMWF) with big dip angle. By the mechanical analysis of SSIDD of working face with big dip angle (WFBDA) in a free state, operating state and special state, we have found the mechanical relationship of critical topple/slip angle with support height, width, ...


    By Inderscience Publishers

  • Application of data mining techniques in building predictive models for oil and gas problems: a case study on casing corrosion prediction

    This paper describes the use of (supervised) data mining to predict casing corrosion in carbon geological storage projects. This study discusses: 1) data pre–processing such as missing value handling and discretisation; 2) feature selection methods such as correlation coefficient, signal–to–noise ratio, information gain, Gini index, and the k–nearest neighbour (KNN) approach; 3) classification ...


    By Inderscience Publishers

  • Graphite flotation brief introduction and prospect application

    Classified by Flotability, the graphite mine belongs to a non-polar and non-metallic mineral with good natural hydrophobicity, it can be floated by only using hydroxysteroid oil collector or frother, so it is easy flotation ore.  Graphite can be applied to make crucibles, magnesia refractories and other senior brushes, lubricants, insulation and so on.  There are two types of graphite ...

  • Response to O'Reilly et al. (2014): Policy of the US Geological Survey on advocacy

    A statement in O'Reilly et al. (2013) alleging USGS Scientists have advocated bans of coal tar sealcoat is inaccurate. It is the policy of the USGS that our products, and communications remain neutral and not advocate, recommend, or prescribe actions. ...


    By John Wiley & Sons, Ltd.

  • Geological Survey Department - Case Study

    Client Geological Survey Department Country Cyprus Background and objective The third largest island in the Mediterranean Sea is battling the subterranean penetration of salt water and long periods of drought, which cause water shortages. Water management in jeopardy The semi-arid climate on Cyprus makes great ...


    By Eijkelkamp Soil & Water

  • Nitrogen patterns in subsurface waters of the Yzeron stream: effect of combined sewer overflows and subsurface–surface water mixing

    Urbanization subjects streams to increased nitrogen loads. Therefore studying nitrogen forms at the interface between urban stream and groundwater is important for water resource management. In this study we report results on water δ18O and nitrogen forms in subsurface waters of a stream (Yzeron, France). The sites studied were located upstream and downstream of combined ...


    By IWA Publishing

  • Results of AMT survey at Patomsky crater case study

    The Patomsky crater is located in east part of the Irkutsk region (Russia). This geological object has anomaly appearance and is discordant placed relative to hosting geological structure. The crater has been discovered in 1949 during routine geological survey of the territory by geologist V.V. Kolpakov. The drastic investigations of Patomsky crater by modern technology have begun since 2006. The ...

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