{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T11:46:28Z","timestamp":1769082388549,"version":"3.49.0"},"reference-count":48,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2018,5,18]],"date-time":"2018-05-18T00:00:00Z","timestamp":1526601600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>X-ray and neutron tomography are applied as a bi-modal approach for the 3D characterisation of a Monturaqui impactite formed by shock metamorphism during the impact of an iron meteorite with the target rocks in the Monturaqui crater (Chile). The particular impactite exhibits structural heterogeneities on many length scales: its composition is dominated by silicate-based glassy and crystalline materials with voids and Fe\/Ni-metal and oxihydroxides particles generally smaller than 1 mm in diameter. The non-destructive investigation allowed us to apply a novel bi-modal imaging approach that provides a more detailed and quantitative understanding of the structural and chemical composition compared to standard single mode imaging methods, as X-ray and neutron interaction with matter results in different attenuation coefficients with a non-linear relation. The X-ray and neutron data sets have been registered, and used for material segmentation, porosity and metallic content characterization. The bimodal data enabled the segmentation of a large number of different materials, their morphology as well as distribution in the specimen including the quantification of volume fractions. The 3D data revealed an evaporite type of material in the impactite not noticed in previous studies. The present study is exemplary in demonstrating the potential for non-destructive characterisation of key features of complex multi-phase objects such as impactites.<\/jats:p>","DOI":"10.3390\/jimaging4050072","type":"journal-article","created":{"date-parts":[[2018,5,21]],"date-time":"2018-05-21T04:07:30Z","timestamp":1526875650000},"page":"72","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Investigation of a Monturaqui Impactite by Means of Bi-Modal X-ray and Neutron Tomography"],"prefix":"10.3390","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1652-5608","authenticated-orcid":false,"given":"Anna","family":"Fedrigo","sequence":"first","affiliation":[{"name":"Science and Technology Facility Council, ISIS Neutron Source, Didcot OX11 0QX, UK"},{"name":"European Spallation Source ESS ERIC, SE-221 00 Lund, Sweden"},{"name":"DTU Compute, DK-2800 Kgs Lyngby, Denmark"}]},{"given":"Kasper","family":"Marstal","sequence":"additional","affiliation":[{"name":"DTU Compute, DK-2800 Kgs Lyngby, Denmark"},{"name":"ERASMUS MC, Biomedical Imaging Group, 3000 CA Rotterdam, The Netherlands"}]},{"given":"Christian","family":"Bender Koch","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Copenhagen, 2100 Copenhagen, Denmark"}]},{"given":"Vedrana","family":"Andersen Dahl","sequence":"additional","affiliation":[{"name":"DTU Compute, DK-2800 Kgs Lyngby, Denmark"}]},{"given":"Anders","family":"Bjorholm Dahl","sequence":"additional","affiliation":[{"name":"DTU Compute, DK-2800 Kgs Lyngby, Denmark"}]},{"given":"Mark","family":"Lyksborg","sequence":"additional","affiliation":[{"name":"DTU Compute, DK-2800 Kgs Lyngby, Denmark"}]},{"given":"Carsten","family":"Gundlach","sequence":"additional","affiliation":[{"name":"DTU Physics, 2800 Kgs Lyngby, Denmark"}]},{"given":"Fr\u00e9d\u00e9ric","family":"Ott","sequence":"additional","affiliation":[{"name":"Laboratoire L\u00e9on Brillouin, CEA-CNRS, 91191 Gif-sur-Yvette CEDEX, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9315-8787","authenticated-orcid":false,"given":"Markus","family":"Strobl","sequence":"additional","affiliation":[{"name":"European Spallation Source ESS ERIC, SE-221 00 Lund, Sweden"},{"name":"Nano-Science Centre, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark"},{"name":"Paul Scherrer Institut, 5232 Villigen, Sweden"}]}],"member":"1968","published-online":{"date-parts":[[2018,5,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1080\/02724634.1999.10011134","article-title":"First Early Cretaceous mammal from the eastern seaboard of the United States","volume":"19","author":"Cifelli","year":"1999","journal-title":"J. Vertebr. Paleontol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1144\/GSL.SP.2003.215.01.02","article-title":"Applications of high-resolution X-ray computed tomography in petrology, meteoritics and palaeontology","volume":"Volume 215","author":"Carlson","year":"2003","journal-title":"Geological Society"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.earscirev.2013.04.003","article-title":"High-resolution X-ray computed tomography in geosciences: A review of the current technology and applications","volume":"123","author":"Cnudde","year":"2013","journal-title":"Earth-Sci. Rev."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"459","DOI":"10.2138\/rmg.2006.63.17","article-title":"Applications of Neutron radiography and Neutron Tomography","volume":"63","author":"Winkler","year":"2006","journal-title":"Rev. Mineral. Geochem."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"589","DOI":"10.1098\/rsta.2004.1510","article-title":"X-ray and neutron diffraction studies and MD simulation of atomic configurations in polyamorphic Y2O3-Al2O3 systems","volume":"363","author":"Wilding","year":"2005","journal-title":"Philos. Trans. R. Soc. A"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1016\/j.nima.2005.01.152","article-title":"High-speed neutron tomography of dynamic processes","volume":"542","author":"Dierick","year":"2005","journal-title":"Nucl. Instrum. Methods Phys. Res. A"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"243001","DOI":"10.1088\/0022-3727\/42\/24\/243001","article-title":"Topical Review: Advances in neutron radiography and tomography","volume":"42","author":"Strobl","year":"2009","journal-title":"J. Phys. D"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"314","DOI":"10.1016\/j.phpro.2017.06.043","article-title":"Bimodal Imaging at ICON Using Neutrons and X-rays","volume":"88","author":"Kaestner","year":"2017","journal-title":"Phys. Procedia"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"113702","DOI":"10.1063\/1.4989642","article-title":"Neutron and X-ray Tomography (NeXT) system for simultaneous, dual modality tomography","volume":"88","author":"LaManna","year":"2017","journal-title":"Rev. Sci. Instrum."},{"key":"ref_10","unstructured":"Tegantini, A., Atkins, D., Giroud, B., Ando, E., Beaucour, J., and Viggiani, G. (2017, January 26\u201330). NeXT-Grenoble, a novel facility for Neutron and X-ray Tomography in Grenoble. Proceedings of the 3rd International Conference on Tomography of Materials and Structures, Lund, Sweden."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Banhart, J. (2008). Advanced Tomographic Methods in Materials Research and Engineering, Oxford University Press.","DOI":"10.1093\/acprof:oso\/9780199213245.001.0001"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Fettes, D., and Desmons, J. (2007). Metamorphic Rocks: A Classification and Glossary of Terms, Cambridge University Press.","DOI":"10.1017\/CBO9780511628917"},{"key":"ref_13","unstructured":"Echaurren, J.C., Ocampo, A.C., and Rocca, M.C.L. (2005, January 12\u201316). A Mathematical model for the Monturaqui Impact Crater, Chile, South America, Meteoritics & Planetary Science 40, Supplement. Proceedings of the 68th Annual Meteoritical Society Meeting of the Meteoritical Society, Gatlinburg, TN, USA."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3737","DOI":"10.1016\/0016-7037(93)90152-M","article-title":"Use of platinum-group elements for impactor identification: Terrestrial impact craters and Cretaceous-Tertiary boundary","volume":"57","author":"Evans","year":"1993","journal-title":"Geochim. Cosmochim. Acta"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1111\/j.1945-5100.2012.1429.x","article-title":"Chemical modification of projectile residues and target material in a MEMIN cratering experiment","volume":"48","author":"Ebert","year":"2013","journal-title":"Meteorit. Planet. Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/j.gca.2013.07.030","article-title":"Chemical projectile\u2013target interaction and liquid immiscibility in impact glass from the Wabar craters, Saudi Arabia","volume":"121","author":"Hamann","year":"2013","journal-title":"Geochim. Cosmochim. Acta"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.earscirev.2009.10.009","article-title":"The Convincing Identification of Terrestrial Meteorite Impact Structures: What Works, What Doesn\u2019t and Why","volume":"98","author":"French","year":"2010","journal-title":"Earth-Sci. Rev."},{"key":"ref_18","unstructured":"Ukstins Peate, I., van Soest, M., Wartho, J., Cabrol, N., Grin, E., Piatek, J., and Chong, G. (2010, January 1\u20135). A Novel Application of (U-Th)\/He Geochronology to Constrain the Age of Small, Young Meteorite Impact Craters: A Case Study of the Monturaqui Crater, Chile. Proceedings of the 41st Lunar and Planetary Science Conference, Houston, TX, USA."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"4891","DOI":"10.1029\/JZ071i020p04891","article-title":"A previously undescribed meteorite crater in Chile","volume":"70","author":"Sanchez","year":"1966","journal-title":"J. Geophys. Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"421","DOI":"10.1144\/0016-764904-071","article-title":"150 million years of climatic stability: Evidence from the Atacama Desert, northern Chile","volume":"162","author":"Hartley","year":"2005","journal-title":"J. Geol. Soc."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2153","DOI":"10.1111\/j.1945-5100.2007.tb01015.x","article-title":"An integrated geophysical and geological study of the Monturaqui impact crater, Chile","volume":"42","author":"Ugalde","year":"2007","journal-title":"Meteorit. Planet. Sci."},{"key":"ref_22","unstructured":"Ramirez, C.F., and Gardeweg, M. (1982). Hoja Toconao, Region de Antofagasta, Servicio Nacional de Geolog\u00eda y Miner\u00eda."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1007\/BF00371181","article-title":"Petrographic and electron microprobe study of the Monturaqui impactite","volume":"36","author":"Bunch","year":"1972","journal-title":"Contrib. Mineral. Petrol."},{"key":"ref_24","first-page":"492","article-title":"The Monturaqui impactite and the iron in it","volume":"29","author":"Lipka","year":"1994","journal-title":"Meteoritics"},{"key":"ref_25","unstructured":"Gibbons, R.V., H\u00f6rz, F., Thompson, T.D., and Brownlee, D.E. (1976, January 15\u201319). Metal spherules in Wabar, Monturaqui, and Henbury impactites. Proceedings of the 7th Lunar and Planetary Science Conference, Houston, TX, USA."},{"key":"ref_26","unstructured":"Koch, C.B. (1991). Weathering of impactite from Monturaqui. Program Abstr. Clay Miner. Soc., 91."},{"key":"ref_27","first-page":"443","article-title":"Weathering of Iron Meteorites from Monturaqui, Chile","volume":"29","author":"Koch","year":"1994","journal-title":"Meteoritics"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1111\/j.1945-5100.2004.tb00339.x","article-title":"Early fracturing and impact residue emplacement: Can modelling help to predict their location in major craters?","volume":"39","author":"Kearsley","year":"2004","journal-title":"Meteorit. Planet. Sci."},{"key":"ref_29","unstructured":"Kloberdanz, C.M. (2010). Geochemical Analysis of the Monturaqui Impact Crater, Chile. [Master\u2019s Thesis, University of Iowa]."},{"key":"ref_30","unstructured":"Cukierski, D.O. (2013). Textural and Compositional Analysis of Fe-Ni Metallic Spherules in Impact Melt from Monturaqui Crater, Chile. [Unpublished Master\u2019s Thesis, University of Iowa]. Available online: https:\/\/ir.uiowa.edu\/cgi\/viewcontent.cgi?article=4595&context=etd."},{"key":"ref_31","first-page":"307","article-title":"Terrestrial alteration of Fe-Ni metals in Antarctic ordinary chondrites and the relationships to their terrestrial ages","volume":"4","author":"Ikeda","year":"1991","journal-title":"Proc. NIPR Symp. Antarct. Meteor."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1016\/0370-1573(81)90014-4","article-title":"X-ray attenuation coefficients of elements and mixtures","volume":"70","author":"Jackson","year":"1981","journal-title":"Phys. Rep."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Jenkins, R., and Snyder, R.L. (1996). Introduction to X-ray Powder Diffractometry, John Wiley.","DOI":"10.1002\/9781118520994"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1144\/GSL.SP.2007.271.01.26","article-title":"A comparative and critical study of X-ray CT and neutron CT as non-destructive material evaluation techniques","volume":"271","author":"Vlassenbroeck","year":"2007","journal-title":"Geol. Soc."},{"key":"ref_35","unstructured":"Kak, A.C., and Slanley, M. (1988). Principles of Computerised Tomographic Imaging, IEEE Press."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"2722","DOI":"10.1063\/1.1729798","article-title":"Representation of functions by its line integrals with some radiological applications","volume":"34","author":"Cormack","year":"1963","journal-title":"J. Appl. Phys."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1016","DOI":"10.1259\/0007-1285-46-552-1016","article-title":"Computerized transverse axial scanning (tomography)","volume":"46","author":"Hounsfield","year":"1973","journal-title":"Br. J. Radiol."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1016\/j.phpro.2015.07.009","article-title":"IMAGINE: A cold neutron imaging station at the Laboratoire L\u00e9on Brillouin","volume":"69","author":"Ott","year":"2015","journal-title":"Phys. Procedia"},{"key":"ref_39","unstructured":"Inside Matters (2017, October 01). Octopus. Available online: https:\/\/octopusimaging.eu\/octopus\/octopus-reconstruction."},{"key":"ref_40","unstructured":"Deans, S.R. (2007). The Radon Transform and Some of Its Applications, Courier Corporation."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"676","DOI":"10.1038\/nmeth.2019","article-title":"Fiji: An open-source platform for biological-image analysis","volume":"9","author":"Schindelin","year":"2012","journal-title":"Nat. Methods"},{"key":"ref_42","unstructured":"Penny, W.D., Ashburner, J., Kiebel, S., Henson, R., Glaser, D.E., Phillips, C., and Friston, K. (2017, October 01). Statistical Parametric Mapping: An Annotated Bibliography. Available online: http:\/\/www.fil.ion.ucl.ac.uk\/spm\/ software\/spm8\/."},{"key":"ref_43","unstructured":"Bizais, Y., Barillot, C., and Di Paola, R. (1995). Automated Multi-modality Image Registration Based On Information Theory. Proceedings of Information Processing in Medical Imaging, Kluwer Academic Publishers."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/S0031-3203(98)00091-0","article-title":"An overlap invariant entropy measure of 3D medical image alignment","volume":"32","author":"Studholme","year":"1999","journal-title":"Pattern Recognit."},{"key":"ref_45","unstructured":"Grimson, E., Shafer, S., Blake, A., and Sugihara, K. (1995, January 20\u201323). Alignment by maximization of mutual information. Proceedings of the International Conference on Computer Vision, Cambridge, MA, USA."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1109\/TSMC.1979.4310076","article-title":"A Threshold Selection Method from Gray-Level Histograms","volume":"9","author":"Otsu","year":"1979","journal-title":"IEEE Trans. Syst. Man Cybern."},{"key":"ref_47","unstructured":"Li, S.Z. (2009). Markov Random Field Modeling in Image Analysis, Springer."},{"key":"ref_48","first-page":"721","article-title":"Metallic spherules in impactite and tektite glasses","volume":"52","author":"Brett","year":"1967","journal-title":"Am. Miner."}],"container-title":["Journal of Imaging"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2313-433X\/4\/5\/72\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:04:55Z","timestamp":1760195095000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2313-433X\/4\/5\/72"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,5,18]]},"references-count":48,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2018,5]]}},"alternative-id":["jimaging4050072"],"URL":"https:\/\/doi.org\/10.3390\/jimaging4050072","relation":{},"ISSN":["2313-433X"],"issn-type":[{"value":"2313-433X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,5,18]]}}}