An innovative optical and chemical drill core scanner

Sjöqvist, Axel S.L.; Arthursson, M.; Lundström, A.; Estrada, E. Calderón; Inerfeldt, A.; Lorenz, Henning

doi:10.5194/sd-19-13-2015

Cited by 10 publications

(14 citation statements)

References 7 publications

(6 reference statements)

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“…In R & D collaborations, Devico AS supplied a core orientation tool for NQ drilling and borehole orientation data, and Minalyze AB scanned the whole drill core with their new XRF scanner (cf. Sjöqvist et al, 2015). The ICDP Operational Support Group (OSG) provided training and practical help.…”

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confidence: 99%

COSC-1 – drilling of a subduction-related allochthon in the Palaeozoic Caledonide orogen of Scandinavia

et al. 2015

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Abstract. The Collisional Orogeny in the Scandinavian Caledonides (COSC) scientific drilling project focuses on mountain building processes in a major mid-Palaeozoic orogen in western Scandinavia and its comparison with modern analogues. The project investigates the subduction-generated Seve Nape Complex. These in part under ultra-high-pressure conditions metamorphosed outer continental margin and continent-ocean transition zone assemblages were emplaced onto the Baltoscandian platform and there influenced the underlying allochthons and the basement. COSC-1 is the first of two ca. 2.5 km deep, fully cored drill holes located in the vicinity of the abandoned Fröå mine, close to the town of Åre in Jämtland, central Sweden. It sampled a thick section of the lower part of the Seve Complex and was planned to penetrate its basal thrust zone into the underlying lowergrade metamorphosed allochthon. The drill hole reached a depth of 2495.8 m and nearly 100 % core recovery was achieved. Although planning was based on existing geological mapping and new high-resolution seismic surveys, the drilling resulted in some surprises: the Lower Seve Nappe proved to be composed of rather homogenous gneisses, with only subordinate mafic bodies, and its basal thrust zone was unexpectedly thick (> 800 m). The drill hole did not penetrate the bottom of the thrust zone. However, lower-grade metasedimentary rocks were encountered in the lowermost part of the drill hole together with garnetiferous mylonites tens of metres thick. The tectonostratigraphic position is still unclear, and geological and geophysical interpretations are under revision. The compact gneisses host only eight fluid conducting zones of limited transmissivity between 300 m and total depth. Downhole measurements suggest an uncorrected average geothermal gradient of ∼ 20 • C km −1 . This paper summarizes the operations and preliminary results from COSC-1 (ICDP 5054-1-A), drilled from early May to late August 2014, and is complemented by a detailed operational report and the data repository.Published by Copernicus Publications on behalf of the IODP and the ICDP.

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confidence: 99%

COSC-1 – drilling of a subduction-related allochthon in the Palaeozoic Caledonide orogen of Scandinavia

et al. 2015

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“…Low-energy X-ray detection is facilitated M A N U S C R I P T A C C E P T E D by the use of a confined vacuum or helium atmosphere in front of the detector, thereby allowing analysis of elements as light as Mg. The 3-D data are also used to measure structural features such as cracks and joints with results being displayed in a cloud-based viewer (Sjöqvist et al 2015).…”

Section: Bruker M4 Tornadomentioning

confidence: 99%

“…Mineral exploration: XRF core scanning is now established as an efficient non-destructive tool in the international mining industry to rapidly extract elemental information from rock core sections and to inform metalliferous exploration strategies (Sjöqvist et al, 2015). The recently developed Minalyze Core Scanner combines rapid XRF core scanning with advanced topographic mapping and high resolution imagery to enable three-dimensional visualization of core features such as faults, veins, and geological structures superimposed on geochemical data obtained from XRF scanning.…”

Section: Environmental Protectionmentioning

confidence: 99%

Current perspectives on the capabilities of high resolution XRF core scanners

Croudace

Löwemark

Tjallingii

et al. 2019

Quaternary International

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The introduction and application of high resolution XRF core scanners has made an enormous contribution to palaeoclimate science over the last two decades. These core scanners have become essential analytical tools for the investigation of sedimentary and other natural cumulative records of environmental change. Their widespread adoption by the environmental and geoscience communities has had a significant impact on the ability to systematically record high resolution chemical profiles in marine and lake sediments and soils. The range of applications has broadened beyond sedimentology and palaeoclimatology and now extends into scanning samples of speleothems, corals, mumiyo mounds, rocks, sedimentary nodules, archaeological artefacts, tree sections and melt segregations. Other areas exploiting the capability of XRF core scanners are mineral exploration, geotechnical characterisation, soil remediation studies and carbon capture and storage research. As a consequence of their ability to efficiently determine detailed, non-destructive elemental records in sediments and soils, scientific papers published since the year 2000 now number more than 1000.

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“…Combination of sensors has advantages over a single sensor due to improved accuracy, improved precision, reduced uncertainty (reduces penalties from the use of sensors separately or redundancy -data on the same target from different sources to increment the confidence) and supports effective decision making [5][6][7][8][9][10][11][12]. Accordingly an improved classification accuracy and predictive performance can be achieved using sensor combinations for material characterization.…”

Section: A Sensor Combinationsmentioning

confidence: 99%

Automation in sensing and raw material characterization - a conceptual framework

Desta

Buxton

2018

2018 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

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The use of sensor technologies for material characterization is rapidly growing and innovative advancement is observed. However, the use of sensor combinations for a raw material characterization in mining is very limited and automation of the material identification process using a combined sensor signal is not defined. Potential sensor technologies for raw material characterization were evaluated based on the applicability and technological maturity. To ensure a rapid implementation of the Real-time mining (RTM) project concept, mature technologies such as Red Green Blue (RGB) imaging, Visible Near Infrared (VNIR) hyperspectral imaging, Short Wave Infrared (SWIR) hyperspectral imaging, Fourier-Transform Infrared Spectroscopy (FTIR), Laser Induced Breakdown Spectroscopy (LIBS) and Raman were selected. Each selected technology was assessed for automation in sensing and applicability (for characterization of the test case materials). Based on the results the sensor data were further considered for data fusion. The proposed sensor combinations approach encompasses three levels of data fusion: low-level, mid-level and high-level. The data of the different sensors are fused together in order to acquire a wide range of mineral properties within each lithotype and an improved classification and predictive models. The preferred level of data fusion and preferred sensor data combinations will be used to develop a multi-variate statistical interpretation rule which relates combination of sensors signals with raw material properties. Thus a tool which integrates the combined sensor signal with materials properties will be developed and used to automate the material characterization process.

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An innovative optical and chemical drill core scanner

Cited by 10 publications

References 7 publications

COSC-1 – drilling of a subduction-related allochthon in the Palaeozoic Caledonide orogen of Scandinavia

COSC-1 – drilling of a subduction-related allochthon in the Palaeozoic Caledonide orogen of Scandinavia

Current perspectives on the capabilities of high resolution XRF core scanners

Automation in sensing and raw material characterization - a conceptual framework

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