Results 61 to 70 of about 26,831 (245)

MINERAL CHEMISTRY OF FELSIC EXTRUSIVE ROCKS OF THE EAST BAYMAK AREA OF THE SOUTHERN URALS AND APROBLEM OF HYBRIDISM IN THEIR GENESIS [PDF]

Минералогия, 2018
The Baymak ore district hosts numerous small Au-rich massive sulfide polymetallic deposits, which is a distinctive feature in comparison with other regions of the West-Magnitogorsk zone (Seravkin, 1986). According to geophysical data, the Baymak block is
A.M. Kosarev, S.A. Svetov, S.Yu. Chazhengina, G.T. Shafigullina   +3 more
doaj  

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

ESEM study of authigenic chlorite acid sensitivity in sandstone reservoirs

, 1993
The effect of HCl on authigenic chlorite in three different sandstones has been examined uisng an Environmental Scanning Electron Microscope (ESEM), together with conventional analytical techniques.
Mackinnon I.D.R., Baker J.C., Uwins, P. J. R., Mackinnon, Ian D. R., Baker, J. C., Uwins P.J.R.   +5 more
core   +1 more source

Assessing the potential of low-cost minerals for the removal of hexavalent chromium from groundwater: a case study from Ukraine

Frontiers in Environmental Chemistry
This study investigated the feasibility of passively treating acidic Cr6+ wastewater and reducing the migration of toxic Cr3+ using locally sourced, low-cost minerals from the mining industry, which are either waste products or secondary raw materials ...
Yuliia Trach, Yuliia Trach
doaj   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Low-temperature magnetic anisotropy in micas and chlorite

, 2014
Phyllosilicates, such as micas and chlorite, are common rock-forming minerals and often show preferred orientation in deformed rocks. In combination with single-crystal anisotropy, this leads to anisotropy of physical properties in the rock, such as ...
Lorenz, Wolfram E A, Bender Koch, Christian, Lorenz, Wolfram E.A., Hirt, Ann M., Biedermann, Andrea R.   +4 more
core   +1 more source

BIF-hosted high-grade magnetite iron ore targeting by hyperspectral wavelength mapping of chlorite: case study of Qidashan Iron Mine, northeast China

Geocarto International, 2023
There are two kinds of chlorites occurred in Anshan area, among which the hydrothermal Fe-chlorite with longer Fe-OH wavelength is spatially related to the high-grade magnetite ore, meaning that wavelength mapping of chlorites can be used to target the ...
Yuzeng Yao, Zining Li, Jing Liu, Jianfei Fu, Tingting Hou, Yongli Zhang   +5 more
doaj   +1 more source

Lithium Isotopic Compositions of Mesozoic and Cenozoic Basalts From South-Eastern China: Implications for Extremely Low δ7Li of Continental-Type Eclogites

Frontiers in Earth Science, 2022
Lithium isotope geochemical studies of oceanic-type eclogites benefited from previous investigation of altered oceanic crust; however, processes of lithium isotope exchange operating on altered protoliths of continental-type eclogites have remained ...
Cheng-Long Yu, Yilin Xiao, Yilin Xiao, Yang-Yang Wang, Olivier Nadeau, He Sun, He Sun, Hong-Qiong Wan, Dong-Yong Li, Xiao-Xia Wang, Dong-Bo Tan   +10 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Vermiculitisation expérimentale d'une chlorite

, 1972
An oxidized iron-rich chlorite (II b polytype ) has been altered in presence of saline, oxidizing and reducing solutions as well as by alternating oxidizing and reducing conditions.
Makumbi, L., Herbillon, Adrien-Jules
core   +1 more source