To be fully embraced into mineral exploration, seismic data require to acquired fast, cheaper and with minimum environmental impacts addressing also the often brown-field highly noisy environment where these surveys are employed. Since 2013 through a number of case studies, we have been testing newly developed for urban environment, digital-based 240 m long, landstreamer mine planning exploration purposes. Here, present pilot study examining potential streamer deep targeting known, down...

ABSTRACT Reflection seismic data were acquired within two field campaigns in the Blötberget, Ludvika mining area of central Sweden, for deep imaging iron‐oxide mineralization that known to extend down 800–850 m depth. The surveys conducted years 2015 and 2016, one employing a landstreamer geophones connected wireless recorders, another using cabled aimed delineate geometry depth extent when commences area. Even with minimal conventional processing approaches, merged datasets provide...

ABSTRACT The development of cost‐effective and environmentally acceptable geophysical methods for the exploration mineral resources is a challenging task. Seismic have potential to delineate deposits at greater depths with sufficiently high resolution. In hardrock environments, which typically host majority metallic deposits, seismic depth‐imaging workflows are challenged by steeply dipping structures, strong heterogeneity related wavefield scattering in overburden as well often limited...

Abstract. Many metallic mineral deposits have sufficient physical property contrasts, particularly density, to be detectable using seismic methods. These are sometimes significant for our society and economic growth can help accelerate the energy transition towards decarbonization. However, their exploration at depth requires high-resolution sensitive Following a series of 2D trials, sparse, narrow source–receiver azimuth, 3D survey was conducted in Blötberget mine, central Sweden, covering...

ABSTRACT In mineral exploration, increased interest towards deeper mineralizations makes seismic methods attractive. One of the critical steps in processing workflows is static correction, which applied to correct effect shallow, highly heterogeneous subsurface layers, and improve imaging targets. We showed an effective approach estimate statics, based on analysis surface waves (groundroll) contained reflection data, we it a legacy line acquired at iron‐oxide mining site Ludvika Sweden....

Abstract. We present pre-stack depth-imaging results for a case study of 3D reflection seismic exploration at the Blötberget iron oxide mining site belonging to Bergslagen mineral district in central Sweden. The goal is directly image ore-bearing horizons and delineate their possible depth extension below depths known from existing boreholes. For this purpose, we applied tailored pre-processing workflow two different imaging approaches, Kirchhoff migration (KPSDM) Fresnel volume (FVM). Both...

During the last decade, and possibly in years to come, mineral exploration geophysics has strongly pushed itself towards developing new instruments hardware solutions capable of addressing ever challenging near-mine brownfield issues. New data will be acquired but higher noise levels restricted access due mining activities infrastructure increase challenge acquiring sufficient quality answer key geologic questions define additional resources. Companies that value their existing reassess them...

Summary A high-resolution reflection seismic survey, using conventional cabled- and wireless-recorders, was carried out in the Blötberget mining area of Bergslagen central Sweden, to provide information about depth lateral extend a known iron-oxide mineralization. The mineralized bodies dip towards southeast moderate angle however their extents are not well defined. Following successful pilot experiment landstreamer that confirmed delineation mineralization methods, two profiles, crossing...

Rock magnetic measurements were carried out on drill core material and hand specimens from the Blötberget apatite – iron oxide deposit in Bergslagen ore province, south-central Sweden, to characterise their properties. Measurements included several kinds of susceptibility hysteresis parameters. Petrographic scanning electron microscopy used independently identify quantify amount type magnetite hematite. Two hematite-rich samples studied with laser ablation inductively coupled plasma mass...

Summary Several physical properties including full-waveform triple sonic, natural gamma, susceptibility, formation and fluid conductivity from downhole geophysics as well laboratory measurements (density, RQD magnetite content) were carried out analysed in order to characterize iron-oxide mineralization their host rocks the Blötberget mining area south-central Sweden. It was observed that a strong seismic signal would be generated sonic data could used proxy for fracture mapping rock quality...

Mineral exploration industry is facing a challenge of innovating solutions for sustainable and mining raw materials. The relates to an ever-increasing demand from both society green-technology providers. In addition, cost-effective environmentally friendly are more prone social acceptance mineral exploration. To address the innovative challenge, prototype E-vib (electromagnetic based, electrically driven) broadband seismic vibrator was upgraded developed hard rock surveys, tested in Ludvika...

Summary Blötberget, in the Ludvika Mines of Bergslagen mineral district central Sweden, is well-known for its iron-oxide, sometimes apatite-rich, deposits. There also a renewed interest exploring and mining deposits due to accessibility market recent advancements made metallurgical technologies. During two field campaigns (2015 2016), high-resolution reflection seismic data were acquired using both cabled-and wireless-recorders as well landstreamer system. In this study, we have merged...

Summary Near-surface velocity models are important for deep imaging of mineral deposits with seismic exploration. The near-surface can be quite complex from loose, highly heterogeneous materials to stiff, fractured rocks. Surface-wave analysis an effective method image the shallow subsurface such challenging environments. Here, we propose a workflow that includes several processing and inversion steps. Initially, optimization parameters, assess presence sharp lateral variations based on...

Industrial sulphate-resisting cement clinker has been investigated by elemental mapping and X-ray microanalysis (EDS) in a scanning electron microscope; powder diffraction (XRD) fluorescence analysis. The interstitial material mainly consists of ferrite Ca 2·01(07) Al 0·71( 7) Fe 0·89(6) Mg 0·08(2) Mn 0·05(2) Si 0·16(4) Ti 0·03(1) P 0·009(3) O 5 (EDS), plus minor amounts an orthorhombic aluminate potassium sulphate (EDS). In the maps (Ca, Si, Al, Fe, K. S), recorded using characteristic K...

Summary In a pilot study, known down to ca. 850 m deep mineralized iron-oxide zone was targeted in the historical Blötberget-Ludvika mining area of central Sweden using MEMS-based, 240 long, comprising 100 sensors landstreamer (2–4 spacing) and combined with 74 wireless recorders (mixed 10 Hz MEMs, spacing). A Bobcat-mounted drop hammer, 500 kg, used generate seismic signal. Within 4 days, about 3.5 km data 2–10 source receiver spacing were acquired. At each location 3 records made stacked...

Summary In mineral exploration, a detailed description of the near-surface is important when seismic reflection applied, because heterogeneity shallow layers can influence imaging deeper targets. The use surface waves provide valuable information about subsurface but multichannel methods might be limited by existence lateral variations in subsurface. On contrary, surface-wave tomography has potential to locate more accurately heterogeneities and without lacking penetration depth. We apply on...

Summary Bergslagen mineral district in south-central Sweden is well known for its iron-oxide deposits. Our study area situated at the historical mining site of Blötberget-Ludvika, which production high-quality iron ores. In past few years, several geophysical and geological studies have been carried out this order to improve knowledge mineralization host rock structures. study, we present latest effort acquiring a sparse 3D reflection seismic survey first-hand view dataset potential it has...

Summary High-resolution seismic images of mineral deposits and their host rocks are an important asset for geological modeling interpretation as well a reliable estimate economic potential. We present tailored workflow imaging data acquired exploration, comprising pre-processing, construction velocity model by full waveform inversion generation depth image using focusing pre-stack migration techniques. This approach can handle challenging subsurface environments typical hardrock...

Abstract. Many metallic mineral deposits have sufficient contrasts, particularly density, to be detectable using seismic methods. These are sometimes significant for our society, economic growth and can help accelerate the energy transition towards decarbonization. However, their exploration at depth requires high-resolution sensitive Following a series of 2D trials, sparse, narrow source-receiver azimuth, 3D survey was conducted in Blötberget mine, central Sweden, covering an area...

Summary Within the H2020-funded Smart Exploration project existing legacy seismic data acquired in Ludvika Mines are analysed order to delineate deposits depth. Here we present a velocity model derived using first-break traveltime tomography, which represent near-surface materials at high resolution and can be directly used for refraction static calculations or incorporation depth imaging algorithm. Our results consistent with velocities from downhole logging show strong vertical gradient...