Results 51 to 60 of about 9,636,025 (200)

Automated mapping of K-feldspar by electron backscatter diffraction and application to 40Ar/39Ar dating [PDF]

open access: yes, 2008
The ability to quantify feldspar microstructure using the electron backscatter diffraction (EBSD) method has direct application in the study of rock deformation and strain kinematics.
Reddy, Steven M.   +3 more
core   +1 more source

Aspergillus niger as an eco-friendly agent for potassium release from K- bearing minerals: Isolation, screening and culture medium optimization using Plackett-Burman design and response surface methodology

open access: yesHeliyon
The potential of Aspergillus niger, to enhance non-exchangeable potassium (K+) release from mineral structures were investigated as a cost-effective and environmentally friendly alternative to traditional chemical fertilizers.
Sanaz Ashrafi-Saiedlou   +4 more
doaj   +1 more source

Microscopic mechanism of sandstone hydration in Yungang Grottoes, China

open access: yesOpen Geosciences, 2020
The macroscopic engineering properties of sandstone are dominated primarily by mineral features in a microscopic scale. This study will investigate the microscopic physical and mechanical properties of the main minerals (quartz, K-feldspar, Na-feldspar ...
Chen Jiawei, Xu Jinming, Huang Jizhong
doaj   +1 more source

Petrographic and Lithofacies of Injana Formation Berman Inticline Northern Iraq

open access: yesTikrit Journal of Pure Science, 2023
This study is including Petrographic and Lithofacies investigation of Injana Formation North Iraq. The Formation composed of succession of sandstone, siltstone and claystone cycles.
Amaar J. Mohammed Al-Taiiy
doaj   +1 more source

Petrography and Synsedimentary Processes of Carbonate beds of Fat’ha Formation. In selected sections at Al-Qayyara area, south of Mosul, Northern Iraq. [PDF]

open access: yesKirkuk Journal of Science, 2017
Fatha was studied in two sections at Alqayyara area southern of Mosul. Petrographically, Sands Fatha indicated composed of quartz monocrystalline and polycrystalline type, while the feldspar forming mostly of plagioclace feldspar and K-feldspar.
Muthanna Y.M
doaj   +1 more source

MORPHOLOGICAL NOTES ABOUT AMAZONITE [PDF]

open access: yesМинералогия, 2018
Morphological features of amazonite cause some onthogenic models of K-feldspars. The crystals of amazonite are zonal and sectorial. «Microcline lattice» of stresses in K-feldspar is formed after its growth during polymorphic transformation of monoclinic ...
V.A. Popov
doaj  

Thermoluminescence trapping parameters of irradiated K-feldspar

open access: yes, 2022
Isothermal decay of the TL glow curve of the irradiated K-feldspars has been investigated at an ambient temperature. A suggested procedure enables the isolation of peaks at the low-temperature region of the TL glow curve. An analysis of the values of the symmetry factor suggests that bimolecular mechanisms are responsible for the kinetics of decay ...
Mammadov, Sahib, Abishov, Aqshin
openaire   +2 more sources

The Effects of Aminium and Ammonium Cations on the Ice Nucleation Activity of K-Feldspar

open access: yes, 2023
Mineral dust is one of the most abundant types of ice nucleating particles in the atmosphere. During atmospheric transport, mineral dust particles can become coated with inorganic and organic solutes, which can impact their ice nucleation activity ...
Worthy, Soleil E.   +4 more
core   +1 more source

K-feldspar data table: Assessing mineral fertility and bias in sedimentary provenance studies: examples from the Barents Shelf

open access: yes, 2019
U–Pb and trace element data for detrital apatite and detrital rutile, Pb isotopic data for detrital K-feldspar, U–Pb data for detrital zircon and a detailed analytical ...
Dirk Frei (2842550)   +5 more
core   +1 more source

Experimental early crystallization of K-feldspar in granitic systems. Implications on the origin of magmatic fabrics in granitic rocks

open access: yesGeologica Acta, 2017
One of the most outstanding characteristics of some granodioritic to granitic rocks is the presence of K-feldspar megacrysts. For instance, granodiorites and monzogranites of the Spanish Central System batholith present variable amounts of large (up to ...
J. DÍAZ-ALVARADO
doaj  

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