News Article | July 20, 2017
VANCOUVER, BC--(Marketwired - July 20, 2017) - Quaterra Resources Inc. ("Quaterra" or the "Company") (TSX VENTURE: QTA) ( : QTRRF) today announced that Chuchuna Minerals Company ("Chuchuna") has commenced a core drilling program of between two and four holes at the Groundhog copper prospect, a 40,000-acre property situated on an established copper porphyry belt 200 miles southwest of Anchorage, Alaska. Quaterra has an option to purchase a 90% interest in Groundhog. The program is operated by Chuchuna, an Alaskan company jointly owned by Kijik Corporation ("Kijik"), the ANSCA village corporation for the community of Nondalton, and Alaska Earth Sciences ("AES"), an Anchorage-based mineral exploration company. Holes will be sited to test several shallow IP anomalies identified by historic surveys and 16.5 kilometers of new IP completed by Zonge International during late June and July. The holes are widely spaced across the property forming an equilateral triangle with sides of about 4.5 kilometers. Two of the holes will test anomalies under shallow Tertiary volcanic cover and one hole will test an anomaly under glacial till. These are the first holes drilled in the Groundhog area. Core will be logged and split in Nondalton and shipped to Fairbanks for analysis by ALS Chemex. Groundhog is located on State of Alaska claims covering the northern extension of a 10-kilometer wide north-northeast trending structural zone that hosts a number of porphyry copper-gold prospects, including the large Pebble porphyry copper, gold and molybdenum project, which is approximately three miles south of the Groundhog claim boundary. Regional magnetic data suggest that geology similar to that at Pebble extends under cover for an additional 30 kilometers northeast from the Pebble deposit. Quaterra is committed to funding $1.0 million for exploration in the first year of its agreement with Chuchuna, and a minimum of $500,000 in each of the following four years. Quaterra can earn its 90% interest in Groundhog by providing a total of $5 million in funding for exploration over five years, and by paying Chuchuna a lump sum of $3 million by the end of the fifth year. Quaterra has no obligation to exercise its option and can terminate the agreement at its discretion annually. (All amounts are expressed in U.S. dollars). Chuchuna will be the operator of the project and will plan, implement and manage exploration field programs as set out in a budget and work plan approved by Quaterra. Technical information in this news release has been approved by Thomas Patton, Ph.D., the CEO of the Company, and a Qualified Person as defined in NI 43-101. About Quaterra Resources Inc. Quaterra Resources Inc. (TSX VENTURE: QTA) ( : QTRRF) is a copper exploration and development company with the primary objective of advancing its U.S. subsidiary's copper projects in the Yerington District, Nevada. The Company also looks for opportunities to acquire copper projects on reasonable terms that have the potential to host large mineral deposits attractive to major mining companies. On behalf of the Board of Directors, Thomas Patton, Chairman & CEO Quaterra Resources Inc. Some statements contained in this news release are forward-looking statements under Canadian securities laws and within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. These statements are identified in this news release by words such as "will", "may", "intends", "anticipates", "offers the potential", "suggests", and similar language, or convey estimates and statements that describe the Company's future plans, objectives, potential outcomes, expectations, or goals. Since forward-looking statements are based on assumptions and address future events and conditions, by their very nature they involve inherent risks and uncertainties. In particular, forward looking statements in this news release include that the Company will be able to finance exploration efforts and acquisition costs; that commodity markets and copper prices will improve; that mapping, sampling, IP and exploration drilling will be undertaken; that results will define mineralization or high grade zones; that historical and new exploration will support a resource on the property; and that the Groundhog assets have the potential to support mining operations. These statements are subject to risks and uncertainties which may cause results to differ materially from those expressed in the forward-looking statements. A summary of risk factors that apply to the Company's operations are included in our management discussion and analysis filings with securities regulatory authorities, and are publicly available on our website. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date thereof. The Company does not undertake to update any forward-looking statement that may be made from time to time except in accordance with applicable securities laws. Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
News Article | December 14, 2016
VANCOUVER, BRITISH COLUMBIA--(Marketwired - Dec. 14, 2016) - GMV Minerals Inc. (the "Company" or "GMV") (TSX VENTURE:GMV) is pleased to announce that it has made application to the Arizona State Land Department (ASLD) for two additional exploration permits which directly adjoin the northern boundaries of its Mexican Hat gold exploration project located in S.E. Arizona. GMV has filed to acquire a 100% interest in Permit No.'s 08-119123 & 08-119124 covering Township 18 South, Range 25 East, (Sections 33 and 34 respectively). The two exploration permits are located adjacent to the north of the Company's claims and 500 metres north of the Hernandez Hill epithermal gold target. The favourable Tertiary volcanic rocks and structures that host the mineralization currently being assessed by the Company are projected onto these licenses. The Company is also pleased to announce that it has received notification from the Bureau of Land Management that it may proceed to drill its newly discovered epithermal target (see NR dated December 6, 2016) subject to receipt of the reclamation bond which has now been posted. The Company has engaged American Drilling Corp. and expects that drilling will commence on this target in early January 2017. GMV also reports that Zonge International has commenced an expanded AMT survey, stepping out to the north, south and east of the test survey and including the Hernandez Hill area. In addition, the Company announces that, subject to regulatory approval, it has granted incentive stock options to certain directors, officers, and consultants to purchase up to an aggregate of 880,000 common shares exercisable on or before December 13, 2021 at a price of $0.60 per share. Dr. D.R. Webb, Ph.D., P.Geol., P.Eng. is the Q.P. for this release within the meaning of NI 43-101 and has reviewed the technical content of this release and has approved its content. GMV Minerals Inc. is a publicly traded exploration company focused on developing precious metal assets in Arizona. GMV, through its 100% owned subsidiary, has a 100% interest in a Mining Property Lease commonly referred to as the Mexican Hat project, located in Cochise County, Arizona, USA. The Mexican Hat property contains an inferred mineral resource of 23,452,000 tonnes grading 0.70 grams of gold per tonne hosting 531,400 troy ounces of gold. The project was initially explored by Placer Dome (USA) in the late 1980's to early 1990's. GMV is focused on developing the asset and realizing the full mineral potential of the property through near term gold production. ON BEHALF OF THE BOARD OF DIRECTORS Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news release may contain forward-looking statements based on assumptions and judgments of management of the Company regarding future events or results. Such statements are subject to a variety of risks and uncertainties which could cause actual events or results to differ materially from those reflected in the forward-looking statements. The Company disclaims any intention or obligation to revise or update such statements except as may be required by law.
News Article | December 21, 2016
Growing Need for Subterranean Warfare Technologies Worldwide to Bolster Its Sales in the Coming Years The Subterranean Warfare Technologies market provides detailed market segment level data on the international market. The Subterranean Warfare Technologies market report addresses forecast and growth patterns by company, regions and type or application from 2016 to 2021. Albany, NY, December 21, 2016 --( Request For Sample Report: http://www.marketresearchhub.com/enquiry.php?type=S&repid=881247 The research study has segmented the market on the basis of different types and applications. The expected growth rate and market share of each segment have been provided in the study along with the demand, consumption and supply figures of subterranean warfare’s to give a clear image of the overall market. Furthermore, the research study presents the market size and forecast from 2011 to 2021 at a global level. Some of the key regions focused in the report include United States, Europe, China and Japan. With the growing use of tunnels and underground facilities by military and irregular forces to gain a tactical advantage is becoming more sophisticated and increasingly effective. In the recent battles, wherever the U.S. & other nations have overwhelming battle powers, their rivals resorted to a strong strategy with the use of underground tunnels and structures. The challenge offered by these clandestine tunnels and underground structures is the key to the emergence of transformational counter-terror technologies and tactics. Further, the report also estimates that future subterranean warfare techno-tactics show various new developments that will open a new era of subterranean warfare, in which a host of ever-changing technologies will be employed by armed forces and law enforcement agencies. The Middle East is full of ancient and modern underground systems that can be used as assets for the enemy forces. The report also profiled key players in the global market such as: Elbit Systems Advanced Geosciences, Inc. (AGI) Allied Associates Geophysical Ltd. CGG Canada Services Ltd Geogiga Technology Corporation Geometrics, Inc. PetRos EiKon Incorporated Geonics Ltd. Geophysical Survey Systems, Inc. Interpex T. Clark Co. Inc. Vista Clara Inc. Mount Sopris Instruments Zonge International, Inc. Geomatrix Earth Science Ltd Northwest Geophysics Spotlight Geophysical Services Read Full Report with TOC: http://www.marketresearchhub.com/report/global-subterranean-warfare-technologies-sales-market-report-2016-report.html In the end of the report, upstream raw materials and downstream demand analysis is also carried out. Additionally, subterranean warfare technologies development trends and marketing channels are analyzed in the report for better understanding. About Market Research Hub: Market Research Hub (MRH) is a next-generation reseller of research reports and analysis. MRH’s expansive collection of market research reports has been carefully curated to help key personnel and decision makers across industry verticals to clearly visualize their operating environment and take strategic steps. MRH functions as an integrated platform for the following products and services: Objective and sound market forecasts, qualitative and quantitative analysis, incisive insight into defining industry trends, and market share estimates. Our reputation lies in delivering value and world-class capabilities to our clients. Contact Details: 90 State Street, Albany, NY 12207, United States Toll Free: 866-997-4948 (US-Canada) Tel: +1-518-621-2074 Email: firstname.lastname@example.org Website: http://www.marketresearchhub.com/ Follow Us On Twitter: https://twitter.com/MktResearchHub Albany, NY, December 21, 2016 --( PR.com )-- Today, the technology to detect and defeat underground facilities has improved, but it is still far away from perfect. Research has been going on for decades to bring out the best for military forces. A new report focusing on this technology has been recently broadcasted to the online repository of Market Research Hub (MRH). The study is entitled as “Global Subterranean Warfare Technologies Sales Market Report 2016” which provides a detailed analysis highlighting the market dynamics that are assessed to determine the growth in the coming few years.Request For Sample Report: http://www.marketresearchhub.com/enquiry.php?type=S&repid=881247The research study has segmented the market on the basis of different types and applications. The expected growth rate and market share of each segment have been provided in the study along with the demand, consumption and supply figures of subterranean warfare’s to give a clear image of the overall market. Furthermore, the research study presents the market size and forecast from 2011 to 2021 at a global level. Some of the key regions focused in the report include United States, Europe, China and Japan.With the growing use of tunnels and underground facilities by military and irregular forces to gain a tactical advantage is becoming more sophisticated and increasingly effective. In the recent battles, wherever the U.S. & other nations have overwhelming battle powers, their rivals resorted to a strong strategy with the use of underground tunnels and structures. The challenge offered by these clandestine tunnels and underground structures is the key to the emergence of transformational counter-terror technologies and tactics.Further, the report also estimates that future subterranean warfare techno-tactics show various new developments that will open a new era of subterranean warfare, in which a host of ever-changing technologies will be employed by armed forces and law enforcement agencies. The Middle East is full of ancient and modern underground systems that can be used as assets for the enemy forces.The report also profiled key players in the global market such as:Elbit SystemsAdvanced Geosciences, Inc. (AGI)Allied Associates Geophysical Ltd.CGG Canada Services LtdGeogiga Technology CorporationGeometrics, Inc.PetRos EiKon IncorporatedGeonics Ltd.Geophysical Survey Systems, Inc.InterpexT. Clark Co. Inc.Vista Clara Inc.Mount Sopris InstrumentsZonge International, Inc.Geomatrix Earth Science LtdNorthwest GeophysicsSpotlight Geophysical ServicesRead Full Report with TOC: http://www.marketresearchhub.com/report/global-subterranean-warfare-technologies-sales-market-report-2016-report.htmlIn the end of the report, upstream raw materials and downstream demand analysis is also carried out. Additionally, subterranean warfare technologies development trends and marketing channels are analyzed in the report for better understanding.About Market Research Hub:Market Research Hub (MRH) is a next-generation reseller of research reports and analysis. MRH’s expansive collection of market research reports has been carefully curated to help key personnel and decision makers across industry verticals to clearly visualize their operating environment and take strategic steps.MRH functions as an integrated platform for the following products and services: Objective and sound market forecasts, qualitative and quantitative analysis, incisive insight into defining industry trends, and market share estimates. Our reputation lies in delivering value and world-class capabilities to our clients.Contact Details:90 State Street,Albany, NY 12207,United StatesToll Free: 866-997-4948 (US-Canada)Tel: +1-518-621-2074Email: email@example.comWebsite: http://www.marketresearchhub.com/Follow Us On Twitter: https://twitter.com/MktResearchHub
News Article | November 29, 2016
Wiseguyreports.Com Adds “Subterranean Warfare Technologies -Market Demand, Growth, Opportunities and analysis of Top Key Player Forecast to 2021” To Its Research Database This report studies sales (consumption) of Subterranean Warfare Technologies in Global market, especially in United States, China, Europe, Japan, focuses on top players in these regions/countries, with sales, price, revenue and market share for each player in these regions, covering Elbit Systems Elpam Electronics Advanced Geosciences, Inc. (AGI) Allied Associates Geophysical Ltd. CGG Canada Services Ltd Exploration Instruments LLC Lockheed-Martin Geogiga Technology Corporation Geomar Software Inc. Geometrics, Inc. Geonics Ltd. Geophysical Survey Systems, Inc. Interpex Ltd. Mount Sopris Instruments PetRos EiKon Incorporated R. T. Clark Co. Inc. Sensors & Software Inc. Vista Clara Inc. Zonge International, Inc. Geomatrix Earth Science Ltd Northwest Geophysics Spotlight Geophysical Services Quest Geo Solutions Limited Market Segment by Regions, this report splits Global into several key Regions, with sales (consumption), revenue, market share and growth rate of Subterranean Warfare Technologies in these regions, from 2011 to 2021 (forecast), like United States China Europe Japan Split by product Types, with sales, revenue, price and gross margin, market share and growth rate of each type, can be divided into Type I Type II Type III Split by applications, this report focuses on sales, market share and growth rate of Subterranean Warfare Technologies in each application, can be divided into Application 1 Application 2 Application 3 Global Subterranean Warfare Technologies Sales Market Report 2016 1 Subterranean Warfare Technologies Overview 1.1 Product Overview and Scope of Subterranean Warfare Technologies 1.2 Classification of Subterranean Warfare Technologies 1.2.1 Type I 1.2.2 Type II 1.2.3 Type III 1.3 Application of Subterranean Warfare Technologies 1.3.1 Application 1 1.3.2 Application 2 1.3.3 Application 3 1.4 Subterranean Warfare Technologies Market by Regions 1.4.1 United States Status and Prospect (2011-2021) 1.4.2 China Status and Prospect (2011-2021) 1.4.3 Europe Status and Prospect (2011-2021) 1.4.4 Japan Status and Prospect (2011-2021) 1.5 Global Market Size (Value and Volume) of Subterranean Warfare Technologies (2011-2021) 1.5.1 Global Subterranean Warfare Technologies Sales and Growth Rate (2011-2021) 1.5.2 Global Subterranean Warfare Technologies Revenue and Growth Rate (2011-2021) 7 Global Subterranean Warfare Technologies Manufacturers Analysis 7.1 Elbit Systems 7.1.1 Company Basic Information, Manufacturing Base and Competitors 7.1.2 Subterranean Warfare Technologies Product Type, Application and Specification 22.214.171.124 Type I 126.96.36.199 Type II 7.1.3 Elbit Systems Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.1.4 Main Business/Business Overview 7.2 Elpam Electronics 7.2.1 Company Basic Information, Manufacturing Base and Competitors 7.2.2 129 Product Type, Application and Specification 188.8.131.52 Type I 184.108.40.206 Type II 7.2.3 Elpam Electronics Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.2.4 Main Business/Business Overview 7.3 Advanced Geosciences, Inc. (AGI) 7.3.1 Company Basic Information, Manufacturing Base and Competitors 7.3.2 142 Product Type, Application and Specification 220.127.116.11 Type I 18.104.22.168 Type II 7.3.3 Advanced Geosciences, Inc. (AGI) Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.3.4 Main Business/Business Overview 7.4 Allied Associates Geophysical Ltd. 7.4.1 Company Basic Information, Manufacturing Base and Competitors 7.4.2 Nov Product Type, Application and Specification 22.214.171.124 Type I 126.96.36.199 Type II 7.4.3 Allied Associates Geophysical Ltd. Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.4.4 Main Business/Business Overview 7.5 CGG Canada Services Ltd 7.5.1 Company Basic Information, Manufacturing Base and Competitors 7.5.2 Product Type, Application and Specification 188.8.131.52 Type I 184.108.40.206 Type II 7.5.3 CGG Canada Services Ltd Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.5.4 Main Business/Business Overview 7.6 Exploration Instruments LLC 7.6.1 Company Basic Information, Manufacturing Base and Competitors 7.6.2 Million USD Product Type, Application and Specification 220.127.116.11 Type I 18.104.22.168 Type II 7.6.3 Exploration Instruments LLC Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.6.4 Main Business/Business Overview 7.7 Lockheed-Martin 7.7.1 Company Basic Information, Manufacturing Base and Competitors 7.7.2 Service Product Type, Application and Specification 22.214.171.124 Type I 126.96.36.199 Type II 7.7.3 Lockheed-Martin Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.7.4 Main Business/Business Overview 7.8 Geogiga Technology Corporation 7.8.1 Company Basic Information, Manufacturing Base and Competitors 7.8.2 Product Type, Application and Specification 188.8.131.52 Type I 184.108.40.206 Type II 7.8.3 Geogiga Technology Corporation Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.8.4 Main Business/Business Overview 7.9 Geomar Software Inc. 7.9.1 Company Basic Information, Manufacturing Base and Competitors 7.9.2 Product Type, Application and Specification 220.127.116.11 Type I 18.104.22.168 Type II 7.9.3 Geomar Software Inc. Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.9.4 Main Business/Business Overview 7.10 Geometrics, Inc. 7.10.1 Company Basic Information, Manufacturing Base and Competitors 7.10.2 Product Type, Application and Specification 22.214.171.124 Type I 126.96.36.199 Type II 7.10.3 Geometrics, Inc. Subterranean Warfare Technologies Sales, Revenue, Price and Gross Margin (2011-2016) 7.10.4 Main Business/Business Overview 7.11 Geonics Ltd. 7.12 Geophysical Survey Systems, Inc. 7.13 Interpex Ltd. 7.14 Mount Sopris Instruments 7.15 PetRos EiKon Incorporated 7.16 R. T. Clark Co. Inc. 7.17 Sensors & Software Inc. 7.18 Vista Clara Inc. 7.19 Zonge International, Inc. 7.20 Geomatrix Earth Science Ltd 7.21 Northwest Geophysics 7.22 Spotlight Geophysical Services 7.23 Quest Geo Solutions Limited
Martini B.A.,Ormat Nevada Inc. |
Lide C.,Zonge International |
Owens L.,Ormat Nevada Inc. |
Walsh P.,Ormat Nevada Inc. |
And 2 more authors.
Transactions - Geothermal Resources Council | Year: 2011
The active, Aleutian-arc stratovolcano Mt. Spurr and its flank-cone, Crater Peak, are the target of current geothermal exploration in the western Cook Inlet. Lying just 80 miles west of Anchorage, AK, the Mt. Spurr complex serves as both a source of hazard and of potential energy. Recent eruptive episodes ('53 and '92) make development here challenging - but the young nature of the volcanic system (all less than ∼255ka), extensive, active faulting, advanced surface alteration suites and fluid chemistries consistent with a geothermal reservoir, also make Mt. Spurr very prospective. Field reconnaissance during the summer of 2009 (including mapping and surface geochemical sampling) set the stage for a full-scale exploration program in the summer of 2010. High resolution satellite imagery coupled with LiDAR kicked-off the exploration program, providing base maps (especially structure) of this poorly known edifice. Heli-bourne aeromagnetics and an aggressive ground-based geophysical suite of gravity and MT were completed over several months. The synthesis of these datasets with additional geologic mapping, geochemical sampling and two ∼1000′ core holes have produced a working geothermal exploration model and served to elucidate large scale structural controls on this young volcanic edifice. Both deep and shallow features were identified in the geophysics and airborne LiDAR, including large scale conductors coincident with surface hydrothermal fluid flow, de-magnetized regions coincident with LiDAR-delineated surface volcanic features and major and minor fault structures coincident with known regional structural trends. We plan to target these major structures (where coincident with geophysical anomalies) with additional intermediate depth core holes in the summer of 2011, the goal of which is to define a viable geothermal reservoir (temperature, fluid and permeability).
Beard L.P.,Zonge International
SEG Technical Program Expanded Abstracts | Year: 2011
Interpretation of out-of-loop data from fixed-loop transient EM surveys can be enhanced by using plate models. Numerical modeling shows it is possible to distinguish flatlying conductors from vertical conductive sheets by comparing the appearance of the vertical and along-line out of loop measurements. Where multiple, steeply-dipping conductive sheets exist, the sheet nearest the transmitter may diminish the responses of more distant sheets, but will usually not cause the more distant sheet to be undetectable. Screening increases with closeness of adjacent plates and with increasing conductance. If the screening effect is not taken into account, estimates of conductance, and by inference, ore tonnage, may be underestimated. © 2011 Society of Exploration Geophysicists.
Calvin W.M.,University of Nevada, Reno |
Littlefield E.F.,University of Nevada, Reno |
Kratt C.,Zonge International
Geothermics | Year: 2015
We use remote sensing data from a variety of satellite and airborne instruments to characterize mineral and thermal properties as surface indicators of geothermal resources in Nevada. We generally use satellite data as a reconnaissance tool to target higher resolution airborne data collections. Spectral data are collected from field surface locations and samples to validate remote identifications and refine mineral maps. Spectral validation is done using an ASD portable spectrometer (0.4-2.5. μm) in both field and lab configurations. We also have a Thermo/Nicolet Nexus 6700 FTIR spectrometer and shared use of a Designs and Prototypes FTIR field instrument for thermal infrared data collection. Past work has identified sinter, tufa, travertine, argillic hydrothermal alteration minerals, evaporites, vegetation concentration near springs, and thermal anomalies as indicative of resource potential and structural controls on fluid pathways. Our methodology places mineral maps into GIS databases with other geologic information to make comparisons and site assessments. We recommend target areas for subsequent exploration including shallow temperature measurements, detailed geologic mapping, and structural analyses. This paper reviews over a decade of remote sensing geothermal exploration in Nevada and summarizes the common and unique features identified by our surveys. © 2014 Elsevier Ltd. All rights reserved.
Wynn J.C.,U.S. Geological Survey |
Fleming J.A.,Zonge International
Ocean Science | Year: 2012
Hydrocarbons released into the deep ocean are an inevitable consequence of natural seep, seafloor drilling, and leaking wellhead-to-collection-point pipelines. The Macondo 252 (Deepwater Horizon) well blowout of 2010 was even larger than the Ixtoc event in the Gulf of Campeche in 1979. History suggests it will not be the last accidental release, as deepwater drilling expands to meet an ever-growing demand. For those who must respond to this kind of disaster, the first line of action should be to know what is going on. This includes knowing where an oil plume is at any given time, where and how fast it is moving, and how it is evolving or degrading. We have experimented in the laboratory with induced polarization as a method to track hydrocarbons in the seawater column and find that finely dispersed oil in seawater gives rise to a large distributed capacitance. From previous sea trials, we infer this could potentially be used to both map and characterize oil plumes, down to a ratio of less than 0.001 oil-to-seawater, drifting and evolving in the deep ocean. A side benefit demonstrated in some earlier sea trials is that this same approach in modified form can also map certain heavy placer minerals, as well as communication cables, pipelines, and wrecks buried beneath the seafloor. © Author(s) 2012.
Beard L.P.,Zonge International
Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP | Year: 2012
Hypervelocity meteor impacts create circular or oval craters and fracture the subsurface. This fracturing has been associated with geothermal resources, metallic ore deposits, and even oil and gas fields. These practical targets give the study of meteor impacts importance aside from the several more basic scientific reasons for impact crater research. An examination of the worldwide distribution of known impact crater locations shows that very few craters appear on or near the magnetic equator. Although this could be mere chance, it is possible that some low latitude impact craters are buried or hidden by heavy vegetation and are overlooked because their magnetic anomalies do not appear particularly ring-like. Magnetic anomalies from impacts are variable, but three main categories capture the majority: (1) simple ring anomalies created by the uplifted rim of the crater, (2) complex crater anomalies consisting of an outer ring and a center anomaly, and (3) a simple crater filled with nonmagnetic debris in modestly magnetic bedrock. At low magnetic latitudes, each of these types can produce induced magnetic anomalies with sufficient magnitudes for detection by aeromagnetic surveys, but which are not decidedly ring-like in appearance. Low latitude rings usually show sizeable anomalies only at their north, south, east, and west extremities. The east and west anomalies may not be large enough spatially to detect with wide line spacing, but the north and south anomalies are usually spatially broad. Most of the remainder of the ring is of such low magnitude as to be almost undetectable. Complex craters produce sizeable magnetic lows in the center. Craters filled with non-magnetic debris may produce detectable magnetic highs. The ability to predict what types of anomalies may be formed by low magnetic latitude impact craters may be useful in identifying these structures in areas such as West Africa or Brazil, where dense vegetation and poor access make detailed initial inspection problematic.
Norton J.,Batelle Memorial Institute |
Sheehan J.,Zonge International |
Beard L.,Zonge International
Proceedings of the Symposium on the Application of Geophyics to Engineering and Environmental Problems, SAGEEP | Year: 2011
The objective of this work was to develop and apply an artificial neural network (ANN) to discriminate ordnance from non-ordnance based on input derived from airborne vertical magnetic gradient data. The project assessed whether more output classifications are beneficial and/or required for effective and consistent discrimination, e.g. large ordnance, small ordnance, scrap, and geology. While it may ultimately be possible to determine ordnance type using ANNs, for this project we got best results with the fundamental classification scheme: UXO or not UXO.