• Discrimination of TiO2 polymorphs in sedimentary and metamorphic rocks 

      Triebold, Silke; Luvizotto, George; Tolosana-Delgado, Raimon; Zack, Thomas; Eynatten, Hilmar (Contributions to Mineralogy and Petrology, 2010)
      Investigation by Raman spectroscopy of samples from different geological settings shows that the occurrence of TiO2 polymorphs other than rutile can hardly be predicted, and furthermore, the occurrence of anatase is more ...
    • Garnet major-element composition as an indicator of host-rock type: a machine learning approach using the random forest classifier 

      Schönig, JanORCIDiD; von Eynatten, Hilmar; Tolosana-Delgado, Raimon; Meinhold, Guido (Contributions to Mineralogy and Petrology, 2021-11-12)
      The major-element chemical composition of garnet provides valuable petrogenetic information, particularly in metamorphic rocks. When facing detrital garnet, information about the bulk-rock composition and mineral paragenesis ...
    • Grain-Size Control on Petrographic Composition of Sediments: Compositional Regression and Rounded Zeros 

      Tolosana-Delgado, Raimon; Eynatten, Hilmar (Mathematical GeosciencesMathematical Geosciences, 2009)
      It is well-known that sediment composition strongly depends on grain size. A number of studies have tried to quantify this relationship focusing on the sand fraction, but only very limited data exists covering wider grain ...
    • Indicator Kriging without Order Relation Violations 

      Tolosana-Delgado, Raimon; Pawlowsky-Glahn, Vera; Egozcue, Juan-Jose (Mathematical GeosciencesMathematical Geosciences, 2008)
      Indicator kriging (IK) is a spatial interpolation technique aimed at estimating the conditional cumulative distribution function (ccdf) of a variable at an unsampled location. Obtained results form a discrete approximation ...
    • Resource Model Updating For Compositional Geometallurgical Variables 

      Prior, Ángel; Tolosana-Delgado, Raimon; van den Boogaart, K. Gerald; Benndorf, Jörg (Mathematical Geosciences, 2020-08-13)
      In the field of mineral resources extraction, one main challenge is to meet production targets in terms of geometallurgical properties. These properties influence the processing of the ore and are often represented in ...