Practical aspects of estimating the quantitative mineral composition of copper-bearing sedimentary rocks on the basis a calculation procedure analogical to the CIPW norm
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2018, Vol 472, Issue 472
Abstract
The paper presents a possibility of estimating the content of ore minerals based on chemical analyses of copper-bearing sedimentary rock samples from the North-Sudetic Synclinorium and from the Fore-Sudetic Monocline using a calculation procedure similar to the CIPW norm. The mineralogical data was obtained by means of an optical microscope and an electron microprobe (EPMA). The quantitative composition of gangue minerals was determined using the XRD method, and of the ores by the computer microscopic image analysis (CAMI). The actual set of gangue and ore minerals, their chemical composition, and proportions of copper ores were determined in the samples. Elements that are the main components of identified minerals were selected. The calculation procedure has been developed in accordance with the mineralogical and chemical data. The set of ore minerals determined based on the calculation of the weight ratios is consistent with the microscopic observations of copper-bearing rocks. The obtained ore contents are similar or slightly higher in poorly mineralized samples and slightly lower in highly mineralized samples in comparison to the results of the CAMI method. These differences may be due to different methods of averaging samples (powdered, averaged rock samples, and a thin section). The calculated ore proportions are consistent with those obtained by the CAMI method. The study calculations of the quantitative ore mineral composition using the calculation procedure analogical to the CIPW norm can be used to a preliminary approximation of the quantity of ores in geological prospection and exploration studies, but they require testing of more variants of the element partition between the set of minerals.<br/><br/>
Authors and Affiliations
Izabella Nowak
Keywords
Related Articles
- EP ID EP401868
- DOI 10.5604/01.3001.0012.6912
- Views 47
- Downloads 0
Litostratygrafia, palinofacje i środowiska sedymentacji utworów triasu w północnej części niecki Nidy
W artykule przedstawiono najnowszą propozycję podziału litostratygraficznego utworów triasu północnej części niecki Nidy nawiązującego do jednostek wyróżnianych na Niżu Polskim oraz w północno-zachodnim obrzeżeniu Gór Św...
Mesostructural analysis of glaciotectonic structures and its application to reconstruction of the ice sheet advance directions
STATIC AND DYNAMIC SOUNDINGS IN THE SOIL INVESTIGATION FOR ROAD CONSTRUCTIONS
The paper presents preliminary results of regional studies carried out along the Kraków–Korczowa (eastern state border) section of designed A4 highway. The studies included: one and a half hundred cone penetration tests...
Professor Andrzej Ber – Scientific achievements
GENEZA OSADÓW ILASTYCH FORMACJI CIECHOCIŃSKIEJ (JURA DOLNA, TOARK) W POŁUDNIOWEJ POLSCE A ICH ZNACZENIE GOSPODARCZE
W artykule podsumowano wyniki dotychczasowych badań osadów ilastych formacji ciechocińskiej (jura dolna, toark) oraz przedstawiono wyniki nowych analiz mineralogicznych i geochemicznych z otworów wiertniczych Brody–Lubie...