Results 251 to 260 of about 53,501 (300)

Gold exploration in the Gabal Abu Karahish area, Central Eastern Desert, Egypt: an integrated geological perspective. [PDF]

Sci Rep
Hegab MAE, Salem SM, Soliman NM, Ghoneim SM, Abd El Wahid KH, Ali HF, Ahmed MA.   +6 more
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Siderite precipitation in Paleoarchean oceans during hydrothermal venting. [PDF]

Sci Adv
Rasmussen B, Muhling JR, Tosca NJ.
europepmc   +1 more source

Advanced integrated strategy for structural and mineralogical exploration of inaccessible regions employing remote sensing and multiscale analysis of aeromagnetic data. [PDF]

Sci Rep
Eldosouky AM, El-Wahed MAA, Attia M, Saada SA, Abbas MA.   +4 more
europepmc   +1 more source

Characteristics of hydrothermally altered wall rocks from modern hydrothermal fields

, 2006
Lackschewitz, Klas S., Devey, Colin W.
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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
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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.
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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
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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
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Zeolites in Hydrothermally Altered Rocks

Reviews in Mineralogy and Geochemistry, 2001
Over the past 40 years, two universally accepted maxims of geology dealing with zeolite minerals have been shown to be incorrect: the first is that zeolites occur primarily as cavity fillings in basaltic igneous rocks, and the second is that these zeolites crystallized from so-called hydrothermal solutions, i.e. thermal waters from depth.
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