Využitelnost kolorimetrie při studiu hornin - na příkladu vápenců ve velkolomu Mokrá
| Title in English | Application of colorimetry for the study of rocks – the example of limestones from the Mokrá Quarry |
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| Authors | |
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | Geologické výzkumy na Moravě a ve Slezsku |
| MU Faculty or unit | |
| Citation | |
| Doi | http://dx.doi.org/10.5817/GVMS2015-1-2-48 |
| Field | Geology and mineralogy |
| Keywords | Moravian Karst; limestones; colorimetry |
| Description | The paper summarizes the results of colorimetric analyses of a large set of limestone samples from the Mokrá Quarry in the Moravian Karst (NE from Brno, Czech Republic). The examined samples belong to three lithologically different series of strata: Macocha, Líšeň,and Březina Formations. Limestones of these formations differ in the contents of non-carbonate component and, hence, in colour. The samples were prepared in four ways for colorimetric measurements: 1. unpolished bulk samples (cleavage planes were masured),2. polished sections, 3. powder in a plastic bag, 4. simple uncovered powder. All of the four ways of sample preparation led to different results. The results were expressed using a CIE L*a*b* colour space. Based on the L* (specific lightness) value, the amounts of a non-carbonate component can be roughly judged. The specific lightness can be used for assigning a sample to a lithostratigraphic member and possibly also to correlation reasons in many cases. |