January 12, 2023 Dataset Open Access

Kirsch, Moritz; Mavroudi, Mary; Thiele, Samuel Thomas; Lorenz, Sandra; Tusa, Laura; Booysen, René; Herrmann, Erik; Fatihi, Ayoub; Möckel, Robert; Dittrich, Thomas; Gloaguen, Richard

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{
  "publisher": "Rodare", 
  "id": "2078", 
  "issued": {
    "date-parts": [
      [
        2023, 
        1, 
        12
      ]
    ]
  }, 
  "abstract": "<p>As part of a project on the development of hyperspectral scanning to support geological mapping in underground mines, we acquired hyperspectral data from three adjacent outcrops of Sn-W-Li greisen rocks in the visitor&rsquo;s mine of Zinnwald, Germany. The hyperspectral scans were pre-processed and then back-projected onto photogrammetric, three-dimensional digital outcrop models resulting in so-called &quot;hyperclouds&quot;. The here presented hyperclouds from the three outcrops (Z1, Z2, and Z3) contain the following attributes:</p>\n\n<p>ZX_Absorbance.ply<br>\nRGB colours: Mica/clay-zinnwaldite-topaz abundance based on absorbance (1 &ndash; hull-corrected reflectance) at 2200 nm (red), 2250 nm (green), and 2085 nm (blue)<br>\nScalars: Absorbance at 2086.88 nm, 2160.69 nm, 2197.53 nm, 2209.8 nm, 2252.7 nm, and 2338.31 nm</p>\n\n<p>ZX_Iron.ply<br>\nRGB colours: Composite (Fe3+ Fe2+ FeOH) iron index (red: 600/570 nm, green:(920 nm + 1650 nm)/ (1035 nm 1230 nm), blue: (2230 nm 2290 nm)/(2245 nm + 2260 nm)<br>\nScalars: Fe3+ = 600/570 nm, Fe2+ = (920 nm + 1650 nm)/ (1035 nm + 1230 nm), FeOH = (2230 nm + 2290 nm)/(2245 nm + 2260 nm)</p>\n\n<p>ZX_MNF.ply<br>\nRGB colours: Minimum noise fraction false colour (red: band 4, green: band 7, blue: band 5)<br>\nScalars: Minimum noise fraction bands 4, 7, 5)</p>\n\n<p>ZX_RGB_mineralogy_Li.ply<br>\nRGB colours: True colour RGB from photogrammetric outcrop model<br>\nScalars: Mineral abundances derived by combining sample mineralogy from quantitative XRD measurements and hyperspectral unmixing approaches: Quartz/Feldspar, Zinnwaldite, Muscovite/Illite, Kaolinite, Topaz, Lithium (by multiplying the zinnwaldite abundance by its average lithium content of 1.7%)</p>", 
  "author": [
    {
      "family": "Kirsch, Moritz"
    }, 
    {
      "family": "Mavroudi, Mary"
    }, 
    {
      "family": "Thiele, Samuel Thomas"
    }, 
    {
      "family": "Lorenz, Sandra"
    }, 
    {
      "family": "Tusa, Laura"
    }, 
    {
      "family": "Booysen, Ren\u00e9"
    }, 
    {
      "family": "Herrmann, Erik"
    }, 
    {
      "family": "Fatihi, Ayoub"
    }, 
    {
      "family": "M\u00f6ckel, Robert"
    }, 
    {
      "family": "Dittrich, Thomas"
    }, 
    {
      "family": "Gloaguen, Richard"
    }
  ], 
  "DOI": "10.14278/rodare.2078", 
  "title": "Data publication: Underground hyperspectral outcrop scanning for automated mine-face mapping \u2014 the Lithium deposit of Zinnwald/C\u00ednovec", 
  "type": "dataset"
}