When a … Seismic Methods Seismic methods can provide valuable information of the subsurface, such as the seismic velocity structure of the geology (e.g. For test boreholes, for which measured seismic velocity logs are also available, the correlation between actual measured and predicted velocities is strong to moderate, depending on the parameters included in the SOM analysis. We used the seismic data acquired within the COGITO-MIN project comprising two approximately 6 km long seismic reflection profiles at the polymetallic Kylylahti massive sulfide mine site in eastern Finland. 260 m. In this region, the sulfur ore is strata-bound and exists within a carbonate interval of a thickness of approximately 28 m. The average sulfur content reaches up to 30%. This special issue belongs to the section "Mineral Deposits". For this reason, some military uses of these surveys have long included quiet detection of submarines and volatile unexploded munitions. Seismic reflection is the most effective exploration tool available to the oil and gas industry, using the transmission of sound waves through the earth and their reflections off different … With offices in France, USA and Australia, the company is active in mineral and hydrocarbon exploration, civil engineering and seismic … However, despite their unmatched spatial resolution and depth penetration, they only have played a minor role in mineral discoveries so far. Not only does this broadband signal enhance reflections from the deepest to the shallowest crust, but it also helps the use of full waveform inversion (e.g., to mitigate cycle-skipping) and related techniques. The 2D seismic data acquisition utilized both Vibroseis and dynamite sources with 20 m spacing and wireless receivers spaced every 10 m. For both source types, the recorded data show clear first breaks over all offsets and reflectors in the raw shot gathers. The seismic reflection profiles show prominent reflectors at 4.5–8 km depth utilizing different migration routines. Alireza Malehmir, Raymond Durrheim, Gilles Bellefleur, Milovan Urosevic, Christopher Juhlin, Donald John White, Bernd Milkereit, Geoff Campbell; Seismic methods in mineral exploration and mine planning: A general overview of past and present case histories and a look into the future. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. This includes topics such as regional reconnaissance of ore system elements; rock physics and quantitative analysis for improved characterization of mineral deposits; modelling, inversion, and integration of seismic data with ore deposit geology. Metamorphosed, igneous and polydeformed rocks, which are common subjects of mineral exploration, can be far more complicated than the stratified rocks examined in the search for oil and ga… Help us to further improve by taking part in this short 5 minute survey, Editorial for Special Issue “Seismic Methods in Mineral Exploration”, Predicting Missing Seismic Velocity Values Using Self-Organizing Maps to Aid the Interpretation of Seismic Reflection Data from the Kevitsa Ni-Cu-PGE Deposit in Northern Finland, Elucidating the Effects of Hydrothermal Alteration on Seismic Reflectivity in the Footwall of the Lalor Volcanogenic Massive Sulfide Deposit, Snow Lake, Manitoba, Canada, Sparse 3D Seismic Imaging in the Kylylahti Mine Area, Eastern Finland: Comparison of Time Versus Depth Approach, Cost-Effective Seismic Exploration: 2D Reflection Imaging at the Kylylahti Massive Sulfide Deposit, Finland, Simultaneous Inversion of Shallow Seismic Data for Imaging of Sulfurized Carbonates, Acquisition and Processing of Wider Bandwidth Seismic Data in Crystalline Crust: Progress with the Metal Earth Project, Underground Vertical Seismic Profiling with Conventional and Fiber-Optic Systems for Exploration in the Kylylahti Polymetallic Mine, Eastern Finland. With the utilization of well log data and results of simultaneous inversion, we were able to calculate the elastic properties of the deposit to evaluate sulfur ore content and changes in lithology. Outline of the method The reflection experiment. Page 3 Saskatchewan Mining Association www.saskmininged.com are in mapping folds, ore deposits, groundwater, underground contamination, and site investigation for construction. Hard Rock Conclusions. Seismic reflection methods have been used for the exploration of mineral resources for several decades. Authors may use MDPI's This method is used to map the structure of subsurface formations by measuring the times required for a seismic wave, generated in the earth by a near surface exploration of dynamite, mechanical impact or … This method works by differentiating rocks based on their “seismic impedance”. Please visit the Instructions for Authors page before submitting a manuscript. Both systems were deployed in boreholes located nearby the target sulfide deposit, and used in combination with an active seismic source that was fired from within the underground tunnels. Please check your email address / username and password and try again. Find support for a specific problem on the support section of our website. Seismic methods were not used for hard-rock mineral exploration until relatively recently. The method involves the propagation and measure of artificial acoustic waves into the earth. In many parts of the world, exploration for mineral deposits is moving progressively but persistently to greater depths, relying on knowledge gained from previous exploration campaigns and also on new exploration tools and techniques to efficiently guide deep and costly boreholes. Relevance of Geophysics across the world is as a result of oil and solid mineral exploration. The main techniques used are: Seismic tomography to locate earthquakes and assist in Seismology Reflection seismology and seismic refraction to map the surface structure of a region. A wide range of case studies are covered, including some that are published in the special issue accompanying this article, from surface to borehole seismic methods, as well as petrophysical data and seismic modeling of mineral deposits. In this article, we present a high-resolution shallow seismic surveying method for imaging the inner structure of the Miocene evaporitic formation, where sulfur ore occurs. MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The integrated analysis of seismic rock properties, lithogeochemical data, and mineral compositional data, estimated via scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), provides insight into the effects of hydrothermal alteration on seismic reflectivity in the footwall of the Lalor volcanogenic massive sulfide (VMS). All geophysical exploration methods, comprising gravity–magnetic, radiometric, electric–electromagnetic and seismic … Research articles, review articles as well as short communications are invited. Dr. Gilles BellefleurDr. Search for other works by this author on: Council for Scientific and Industrial Research (CSIR) and University of the Witwatersrand. Due to high metal prices and increased difficulties in finding shallower deposits, the exploration for and exploitation of mineral resources is expected to move to greater depths. Five seismic profiles were acquired with a total length of 2450 m. The acquisition was designed to obtain high-resolution, long offsets and a satisfactory signal-to-noise ratio. Improvements are here attributed to the increased bandwidth of the signal, better estimates of refraction and reflection velocities used in processing, and especially the pre-stack time migration of the data. In mineral exploration and engineering projects, applicability of seismic imaging is often limited and other geophysical methods take the front seat. During the month, the seismic stations recorded thousands of mining induced earthquakes and strong ambient seismic … Due to high metal prices and increased difficulties in finding shallower deposits, the exploration for and exploitation of mineral resources is expected to move to greater depths. The emergence of the concept of a “mineral system” has changed the way regional-scale mineral prospectivity is assessed. 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