Results 21 to 30 of about 238 (148)

POLYCHROME CANCRINITE–VISHNEVITE OF ALKALI PEGMATITES OF THE KUROCHKIN LOG OCCURRENCE, VISHNEVYE MOUNTAINS OF THE URALS [PDF]

open access: yesМинералогия, 2018
Polychrome cancrinite–vishnevite crystal was found in alkali nepheline-feldspar pegmatites of the Kurochkin Log occurrence from the Vishnevye Mountains in the Southern Urals.
V.A. Popov, V.I. Popova
doaj   +1 more source

NEW DATA ON PYROCHLORE OF ALKALI PEGMATITES AND ORE ZONES OF THE VISHNEVYE MOUNTAINS (SOUTHERN URALS) [PDF]

open access: yesМинералогия, 2018
The minerals of the pyrochlore group are abundant in rocks of the Vishnevogorsk alkaline complex – miaskites, mica rocks, carbonatites, and their pegmatites. Several generations of pyrochlore can be found in complex pegmatite bodies.
V.I. Popova   +3 more
doaj   +1 more source

New investigations on Dunje pegmatite, Macedonia I: the contribution to the knowledge about alkali feldspars and its mineral paragenesis [PDF]

open access: greenGeologica Macedonica, 2016
Selečka Mountain was thoroughly investigated in the past mostly because of the interesting mineral paragenesis presented in granites, gneisses, amphibolites, different schists and pegmatite bodies. In the valley Smilevski Dol, around 3 km SW from the village of Dunje (Mariovo plateau), in the vicinity of small spring Šohlehov Kladenec hydrothermal ...
Zebec, Vladimir   +5 more
  +5 more sources

Extreme alkali bicarbonate- and carbonate-rich fluid inclusions in granite pegmatite from the Precambrian Rønne granite, Bornholm Island, Denmark

open access: greenContributions to Mineralogy and Petrology, 2010
Our study of fluid and melt inclusions in quartz and feldspar from granite pegmatite from the Precambrian Ronne granite, Bornholm Island, Denmark revealed extremely alkali bicarbonate- and carbonate-rich inclusions. The solid phases (daughter crystals) are mainly nahcolite [NaHCO3], zabuyelite [Li2CO3], and in rare cases potash [K2CO3] in addition to ...
Thomas, R., Davidson, P., Schmidt, C.
openaire   +5 more sources

Alkali-rich replacement zones in evolved NYF pegmatites: metasomatic fluids or immiscible melts?

open access: green, 2019
The attached document is the authors’ submitted version of the oral presentation. You are advised to consult the publisher’s version if you wish to cite from it.
Muller, A   +4 more
openaire   +2 more sources

ALKALI-DEFICIENT ELBAITE FROM PEGMATITES OF THE SERIDÓ REGION, BORBOREMA PROVINCE, NE BRAZIL

open access: closedRevista Brasileira de Geociências, 2000
DWIGHT RODRIGUES SOARES   +3 more
openaire   +3 more sources

PETROGENESIS OF SELECTED PEGMATITIC BODIES FROM EASTERN DESERT AND SINAI MASSIF, EGYPT [PDF]

open access: yesDelta Journal of Science, 2005
Selected pegmatitic bodies of simple and complex types (unzoned and zoned) located in the Eastern Desert (ED) and Sinai Massif (SM) have been carefully studied. The simple pegmatites under consideration occur at Wadi Hawashia (northern ED), Gabal El Hudi
E.K. Abu Zeid   +4 more
doaj   +1 more source

CONTRIBUTION TO THE GEOLOGY AND RADIOACTIVITY OF THE OLDER GRANITOIDS AND YOUNGER GRANITED OF GABAL EL-URF-GABAL ABU SHIHAT AREA, EASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2005
The younger granites form an elongated belt following NNE-SSW direction. They intrude the older granitoids with sharp intrusive contacts and carry them as roof pendants. Two varieties of the younger granites are identified.
AHMED M. DARDIER, MEDHAT M. EL-MANSI
doaj   +1 more source

Investigation on tourmaline occurrence in the metamorphic complex in the north of Golpayegan, Sanandaj-Sirjan Zone [PDF]

open access: yesپترولوژی, 2022
The occurrence of tourmaline in the metamorphic complex of the north of Golpayegan is observed within the granitoid mass and schists in contact with granitoid and marbles.Speaking of abundance, tourmaline is less frequently a minor mineral found in ...
Solomon Ahmadi Bonakdar   +2 more
doaj   +1 more source

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