Results 111 to 120 of about 7,307 (154)

A Review of Nanomaterials in Heavy-Oil Viscosity Reduction: The Transition from Thermal Recovery to Cold Recovery. [PDF]

open access: yesNanomaterials (Basel)
Tao Z   +9 more
europepmc   +1 more source

Phillipsite alteration in hydrothermal brines

Materials Research Bulletin, 1987
Hydrothermal alteration of phillipsite in 3N chloride brines of Li+, Na+, K+, NH4+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, Al2+, Fe3+, La3+, and Nd3+ was investigated at 300° C under a confining pressure of 30 MPa. Phillipsite altered to α spodumene in LiCl, to analcime and albite in NaCl, to orthoclase and leucite in KCl, NH4+-phillipsite in NH4Cl, to ...
Sridhar Komarneni, Rustum Roy
openaire   +1 more source

Alteration of CsAlSiO4 in hydrothermal fluids

Nuclear and Chemical Waste Management, 1982
Abstract CsAlSiO 4 , one of the hosts for the immobilization of Cs from nuclear wastes, altered extensively in solutions of low and high cationic activity under mild hydrothermal conditions which may be expected in a radwaste repository. For example, the CsAlSi0 4 phase changed to pollucite and chlorite in deionized water and 3 n MgCl 2 brine ...
Sridhar Komarneni, William B. White
openaire   +1 more source

Hydrothermal Alteration in Some Granodiorites

Clays and clay minerals (National Conference on Clays and Clay Minerals), 1957
AbstractThe patterns of distribution of the mica and clay minerals resulting from alteration of feldspars are much less regular and well defined in the “porphyry copper” deposits than in the vein deposits such as those at Butte, Montana. There are, however, interpretative problems common to both.
Charles Meyer, Julian Hemley
openaire   +1 more source

Weathering or hydrothermal alteration?

CATENA, 1983
Summary Altered granites are sometimes attributed to deep weathering, and sometimes to hydrothermal alteration. The nature of the evidence for the latter is discussed, and found inadequate in many instances. The alteration at Bega, Australia, and Dartmoor, England, is considered to result from deep weathering.
openaire   +1 more source

TYPIZATION OF HYDROTHERMAL ALTERATIONS IN THE BOROV DOL DEPOSIT

Geologica Macedonica, 2022
For the study of hydrothermal alterations in the Borov Dol deposit, a total of 12 samples were taken, of which 10 samples from boreholes BD-335, BD-320 and BD-322, and 2 samples from the open pit mining of Borov Dol. The material for the X-ray diffraction analyses was also prepared from the samples from which petrographic preparations were made.
openaire   +1 more source

Weathering and hydrothermal alteration: Critique of OLLIER's argument

CATENA, 1983
Summary We repeat our claim that weathering of granitic rocks of the Bega batholith was facilitated by hydrothermal action. We reject OLLIER's argument, and we report new mineralogical evidence in support of our case.
R.W. Young, J.C. Dixon
openaire   +1 more source

Hydrothermal Alteration and Weathering

1955
A considerable group of minerals, including the clay minerals, zeolites, pyrophyllite, chlorite, alunite, vermiculite, certain carbonates, sulfates, and other minerals under special circumstances, may originate through the interaction of thermal fluids and rock masses.
openaire   +1 more source

Facies and types of hydrothermal alteration

Economic Geology, 1962
Most hydrothermally altered rocks are readily grouped into 2 principal facies, the argillic and phyllic (mica) facies. The argillic facies comprises the propylitic, montmorillonitic, and kaolinitic types, and the phyllic facies the muscovitic and biotitic types.
openaire   +1 more source

Hydrothermal Alteration of the Oceanic Crust

1989
Recycling of the oceanic crust is potentially a dominant process in the formation of OIB mantle sources (Hofmann et al. 1978; 1986) and is a significant contribution to the flux of material between the continent and the depleted mantle (Albarede and Michard, 1986).
Francis Albarede, Annie Michard
openaire   +1 more source

Home - About - Disclaimer - Privacy