Results 41 to 50 of about 13,752 (229)
Dizhi lixue xuebaoObjective The 509 Daobanxi deposit in the West Kunlun orogenic belt is a newly discovered large pegmatite-type lithium-polymetallic deposit in northwestern China.
HUO Hailong +11 more
doaj +1 more source
A new occurrence of samuelsonite in the Buranga Pegmatite, Rwanda [PDF]
Bulletin of the Geological Society of Finland, 1992 A new occurrence of the rare mineral species, samuelsonite, is reported from the Buranga pegmatite, Rwanda, in close association with gatumbaite and burangaite, as aggregates of bladed crystals imbedded in trolleite and in bertossaite.
A.-M. Fransolet +2 more
doaj +1 more source
Typomorphism of perthitic intergrowth of feldspars from granitic pegmatites from the area of west Azov (Ukrainian shield) [PDF]
, 2014 Приведены данные о вещественном составе графических пегматитов с различной специализацией кварца и отмечено широкое развитие пертитовых вростков в полевых шпатах.
Slivnaya, E. V. +2 more
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Ancient tin production: Slags from the Iron Age Carvalhelhos hillfort (NW Iberian Peninsula) [PDF]
, 2018 Provenance and production of tin in the Ancient World has since long been a major topic of discussion among archaeologists. In Western Europe, where significant tin ore (cassiterite) deposits are known, only a few remains of ancient tin production, such ...
Figueiredo, Elin +5 more
core +1 more source
A geophysical investigation of the Roter Kamm impact crater, Namibia
Meteoritics &Planetary Science, EarlyView.Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus +6 more
wiley +1 more source
Do Pegmatites Crystallise Fast? A Perspective from Petrologically-Constrained Isotopic Dating
Geosciences, 2023 Most recent studies consider the formation of individual pegmatite bodies to be a fast process with estimated crystal growth rates reaching a walloping 10 m/day. This opinion is presumably underpinned by the traditional way of thinking of them as the end
Daniil V. Popov
doaj +1 more source
The Canadian Mineralogist, 2015 Gahnite from LCT granitic pegmatites of the Comechingones (Blanca Dora, Juan Roman, Magdalena, La Ona, and Sin Nombre pegmatites) and Conlara (Nancy pegmatite) pegmatite districts, Argentina, was analyzed to investigate the relationship between its chemistry, pegmatite mineralogy, and pegmatite melt evolution.
Heimann, Adriana +2 more
openaire +2 more sources
Revisiting the Hummeln structure, Sweden—A shallow marine Cambrian impact structure
Meteoritics &Planetary Science, EarlyView.Abstract Hummeln is a simple impact structure located in south‐eastern Sweden. It is approximately 1.2 km in diameter and almost completely covered by a lake. Here, we present the first detailed investigation of impactites and mapping of the 164.25 m deep drill core Hummeln‐1 with a focus on impact metamorphism and the impact process.
S. Alwmark +8 more
wiley +1 more source
Frontiers in Earth ScienceThe China Koktokay Pegmatite Group is an important metallogenic region where major rare-metal ores are mined. Here, we present new low-temperature thermochronological data to contribute to the understanding of the Koktokay Pegmatite Group’s exhumation ...
Haoyu Wang +6 more
doaj +1 more source
Minerals in Afghanistan : rare-metal deposits [PDF]
, 2007 In Afghanistan rare metals (lithium, caesium, tantalum and niobium) occur in three main deposit types: pegmatites, mineralised springs and playa-lake sediments (Figure 1).
Benham, Antony John, Coats, Stan
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