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Rock Forming Minerals
Published in Aurèle Parriaux, Geology, 2018
To identify a mineral under a polarized light microscope, a thin section is prepared. This involves gluing a small cube of rock to a glass plate and reducing its thickness to 30 μm (which is why it is called a thin section). An animation on the internet shows minerals and rocks as they appear under polarized light microscope. The examination of the thin section under an optical microscope, with a light source under the thin section, allows opaque minerals to be distinguished from translucent minerals.
The effect of stress level on the compressive strength of the rock samples subjected to cyclic loading
Published in Vladimir Litvinenko, EUROCK2018: Geomechanics and Geodynamics of Rock Masses, 2018
Melek Hanım Beşer, Kerim Aydiner
Thin sections were prepared to analyze the mineralogical and petrographic properties of the rock. According to the results of analyses, this rock generally shows porphyritic, microlitic porphyritic and hyalo-microlitic porphyritic texture. It is observed that main components of most of these rocks are leucite, calcitic plagioclase, pyroxene (%20), amphibole (3–5%), biotite (3–5%) and opaque (2%) minerals. The secondary minerals are chlorite, calcite, zeolite and clay minerals. As a result of microscopic examination, this rock is located tephrite/basanite groups. Also, this rock is named as tephrite due to the olivine absence.
Rock Forming Minerals
Published in Aurèle Parriaux, Geology, 2018
To identify a mineral under a polarized light microscope, a thin section is prepared. This involves gluing a small cube of rock to a glass plate and reducing its thickness to 30 μm (which is why it is called a thin section). An animation on the DVD shows minerals and rocks as they appear under polarized light microscope. The examination of the thin section under an optical microscope, with a light source under the thin section, allows opaque minerals to be distinguished from translucent minerals.
Ultrasonic characterisation of the elastic properties of mineral aggregates used in asphalt mixtures
Published in Road Materials and Pavement Design, 2023
Valentin Donev, Olaf Lahayne, Bernhard Pichler, Lukas Eberhardsteiner
In this paper, the petrographic description of the test specimens is limited to the determination of their mineral composition and the rock classification. Typical natural rock types used in asphalt mixtures include igneous rocks (e.g. gabbro, granite, diorite, diabase, basalt, porphyry), sedimentary rocks (e.g. limestone, sandstone, dolomite), and metamorphic rocks (e.g. gneiss, marble). A petrographic analysis may be conducted using analysis of thin sections, scanning electron microscopy (SEM), X-ray diffraction (XRD), chemical analysis, or other techniques (Wenk & Bulakh, 2004). In the course of this study, an X-ray powder diffraction analysis was performed at the Institute for Applied Geology of the University of Natural Resources and Applied Life Sciences, Vienna (BOKU). X-ray powder diffraction is a method that allows for qualitative and semi-quantitative determination of the mineral composition of rock samples. One of the advantages of XRD is that it can be used to determine the mineral composition of crushed aggregates as well (e.g. filler, sand).
Paleo Environmental Pollution Assessment of Erdek and Bandırma Bays in the Sea of Marmara, Türkiye
Published in Soil and Sediment Contamination: An International Journal, 2023
Ç Özen, E Sarı, T. N. Arslan Kaya, M. Gül, M. A. Kurt, M. Adeel
Thin sections were used for mineralogical and petrographic analyses. For this analysis, clastic sediments were stuck using the Canada Balsam, then tight samples were sawed and ground with grit abrasive until the sample reached the necessary transparency for the mineralogical description.