Results 41 to 50 of about 3,307 (182)

Archaeological Geology of Jurash, ʿAsīr Province, Southwestern Saudi Arabia

Arabian Archaeology and Epigraphy, Volume 36, Issue 1, Page 230-244, November 2025.
ABSTRACT The Jurash archaeological site is located on Wādī Bīshah near the city of Khamīs Mushayt in southwestern Saudi Arabia. It has a fort and other remains from the pre‐Islamic period (third century bc to early seventh century ad) and a settlement with two mosques from the Early Islamic period (early seventh to early 11th centuries ad).
James A. Harrell
wiley   +1 more source

Structural and paragenetic analysis of swarms of bubble like pegmatites in a miarolitic granite from Assunção South – Viseu – Central Portugal [PDF]

, 2013
Publicado em "PEG 2013 : Contributions to The 6th International Symposium on Granitic ...
Araújo, Pedro P., Azevedo, João, Carvalho, José, Dias, Patrícia Sofia Alves, Gomes, C. Leal, Oliveira, Jorge, Pereira, Bruno, Pereira, Márcio   +7 more
core  

Minerals of rocks [PDF]

, 2016
We live in technically oriented time with computers, internet and mobile phones all around us which leads to the fact that we have less and less time. Any information whether from science, technology, medicine, sport, politics, life etc.
Milovanovic, Dragan, Boev, Blazo, Lepitkova, Sonja   +2 more
core   +1 more source

Rare alkali metals in micas from Shakhdarinskaya miarolitic pegmatite (South-Western Pamir)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2017
The study is focused on the mineralogy of rare-element rich tourmaline-bearing miarolitic pegmatities of the Shakhdarinskaya vein (SW Pamirs, Tajikistan). The results of the study are crucially important for understanding the regularities of distribution and behavior of Li, Rb and Cs in the course of crystallization of the most low-temperature ...
Ekaterina Nikolaevna Sokolova, Sergey Zakharovich Smirnov, Elvira Nurfasovna Kungulova, Vladimir Nikolaevich Korolyuk, Sergey Ivanovich Konovalenko   +4 more
openaire   +2 more sources

Reconstructing Early Cenozoic Paleodrainage and Tectonic Evolution in the Southeastern Tibetan Plateau: Evidence From Detrital Zircon and Tourmaline Provenance

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract The Paleogene sedimentary basins of southeastern Tibet record sediment dispersal patterns associated with crustal deformation during the early stages of the India–Asia collision. We present detrital zircon U–Pb geochronology, tourmaline geochemistry, and petrographic data from the Gonjo and Mangkang basins that suggest a reginal interconnected
Yuquan Jiang, Linlin Li, Yingying Li, Xiangjiang Yu, Zhongtai He, Dewen Li   +5 more
wiley   +1 more source

Metamorphic and metasomatic evolution of the Western Domain of the Karagwe-Ankole Belt (Central Africa) [PDF]

, 2020
The tectonometamorphic evolution of the Western Domain of the Karagwe-Ankole Belt, containing widespread granite-related W-Nb-Ta-Sn mineralization in pegmatites and hydrothermal quartz veins of Early Neoproterozoic age, is largely unknown.
Dewaele, Stijn, Hulsbosch, Niels, Muchez, Philippe, Van Daele, Johanna   +3 more
core   +1 more source

Sassolite Precipitation at the Restless Campi Flegrei Volcano in Italy Points to Hydrothermal Flashing by Deep Boron‐Rich Brines

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Studying the behavior of dormant volcanoes is a major challenge in volcanology. Here, we conducted a 10‐year survey of hydrothermal mineralization at Campi Flegrei, an active volcano near Naples in Italy, which last erupted in 1538. Our survey revealed a significant output of boric acid at the hydrothermal sulfate discharge area of Pisciarelli,
M. Piochi, A. Mormone, G. Solomita, R. Moretti   +3 more
wiley   +1 more source

Petrographic Studies of Potash Feldspar from the Yamato Sanmyaku, East Antarctica [PDF]

, 1966
The Yamato Sanmyaku is a mountain range located about 200km south of Prins Harald Kyst, East Antarctica. The mountains are composed of charnockitic group and granitic group rocks which were described geologically and petrographically by K. KIZAKI (1965).
Koshiro KIZAKI, Yoshihide OHTA, オオタ ヨシヒデ, キザキ コウシロウ   +3 more
core   +1 more source

Textural and mineral-chemistry constraints on columbite-group minerals in the Penouta deposit: evidence from magmatic and fluid-related processes [PDF]

, 2018
The Penouta Sn-Ta deposit, in the northwest of Spain, is a greisenized granitic cupola where Ta minerals occur mainly as disseminations in a leucogranite body intruded in Precambrian–Lower Cambrian gneisses and mica-schists. This leucogranite is a medium-
Alfonso Abella, María Pura, Anticoi Sudzuki, Hernán Francisco, Calvo Torralba, Daniel, García Polonio, Francisco, García-Vallès, Maite, Guasch Cascallo, Eduard, Hamid, Sarbast, Llorens González, Teresa, López Moro, Francisco Javier, Oliva Moncunill, Josep, Parcerisa Duocastella, David, Tomasa Guix, Oriol   +11 more
core   +2 more sources

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

Contributions 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   +4 more sources