Results 31 to 40 of about 273,837 (164)

VIS-NIR-SWIR spectroscopic mapping for classification of hydrothermal-metasomatic alterations on the flanks of the Stolbovoe uranium deposit (Eastern Cis-Sayan)

Известия высших учебных заведений: Геология и разведка, 2022
Background. The Stolbovoe deposit is located in the northern part of the Eastern Sayan, in the Nizhneudinsky district of the Irkutsk region, within the N-47-IX map sheet. The surveying of the territory began in the sixties of the last century.
E. N. Karmanov, N. V. Ledeneva, V. A. Rassulov, A. V. Tomashev   +3 more
doaj   +1 more source

Seafloor basalt alteration and chemical change in the ultra thinly sedimented South Pacific

, 2014
Determining the relationship between ocean floor basalt alteration and sedimentation is fundamental to understanding how oceanic crust evolves with time.
Christopher Smith‐Duque, Guo‐Liang Zhang, Smith-Duque, Christopher, Zhang, Guo-Liang   +3 more
core   +1 more source

Hydrothermal alteration in the lower part of an early Proterozoic greenstone complex at Palovaara, Enontekiö, northwestern Finland [PDF]

Bulletin of the Geological Society of Finland, 1988
The lower part of the early Proterozoic greenstone complex at Palovaara, northwestern Finnish Lapland, comprises a quartzite formation overlain by intermediate and felsic tuffs and tuffites with some lava flows, mostly intermediate in chemical ...
P. Eilu, H. Idman
doaj   +1 more source

THE “CLINOPYROXENE” PALEOGEOTHERM BENEATH THE OBNAZHENNAYA KIMBERLITE PIPE AND THIСKNESS OF LITHOSPHERE UNDER THE KUOYKA FIELD (SIBERIAN CRATON, YAKUTIA)

Геодинамика и тектонофизика, 2022
The mantle paleogeotherm under the Obnazhennaya kimberlite pipe (Kuoika field, Siberian craton) was reconstructed using the chemical composition of clinopyroxene xenocrystals and the FITPLOT program.
E. A. Muravjeva, A. M. Dymshits, I. S. Sharygin, A. V. Golovin, A. M. Logvinova, O. B. Oleinikov   +5 more
doaj   +1 more source

Extended chronologies of aqueous alteration in the CM2 carbonaceous chondrites: evidence from carbonates in Queen Alexandra Range 93005 [PDF]

, 2012
The Antarctic CM2 carbonaceous chondrite QUE 93005 contains four compositionally distinct carbonates, namely breunnerite, calcite, dolomite and a Ca-poor dolomite. These carbonates can form monomineralic grains, or may be intergrown as bimineralic grains
Alexander, C., Lindgren, P., Lee, M., Sofe, M., Wang, J.   +4 more
core   +1 more source

On reasons of specific composition of the Keivy domain rocks (the Kola Peninsula) [PDF]

Vestnik MGTU, 2017
The Keivy domain differs from the other structures of the Kola region by the specific composition of the metamorphic complexes, the presence of the oldest for the region alkaline granites and gabbroanorthosites associated with them as well as by the ...
Kozlov N. E., Fomina E. N., Martynov E. V., Sorokhtin N. O., Marchuk T. S.   +4 more
doaj   +1 more source

The geochemistry and element mobility during albitization and related uranium mineralization, Rohil deposit, Rajasthan, India

Discover Geoscience
The albitite-hosted, Mesoproterozoic Rohil uranium deposit (Latitude: 27° 33′ 25ʺ N; Longitude: 75° 29′ 25ʺ E) is located in the Sikar district, Rajasthan of Western India.
Debalin Rout, Rajagopal Krishnamurthi, Ambika Prasad Kushwaha, Shailendra Kumar Sharma   +3 more
doaj   +1 more source

Progressive albitisation in the "Migmatite Creek" region, Weekeroo Inlier, Curnamona. [PDF]

, 2009
Albitisation is pervasive and intense in the Curnamona Province. Most FeO-Cu-Au-U-REE deposits are associated with sodic alteration or albitisation (alkaline alteration) worldwide.
Yang, Cheng Lin
core  

Geochronology of metasomatic events

, 2012
In order to date any geological event, suitable mineral geochronometers that record that and only that event must be identified and analyzed. In the case of metasomatism, recrystallisation is a key process that controls both the petrology and the ...
Villa, Igor Maria, Michael L. Williams, Williams, Michael L, Igor M. Villa   +3 more
core   +1 more source

Monitoring fluid chemistry in iron oxide–copper–gold-related metasomatic processes, eastern Mt Isa Block, Australia

, 2006
Most researchers in the Proterozoic eastern Mt Isa Block, NW Queensland, Australia, favour magmatic fluid and salt sources for sodic-(calcic) alteration and iron oxide-copper-gold mineralization.
Marshall, L.J., Oliver, N.H.S.
core   +1 more source