Results 91 to 100 of about 13,752 (229)

Zircon U-Pb dating of Mesozoic volcanic and tectonic events in northwest Palmer Land and southwest Graham Land, Antarctica [PDF]

, 2009
New whole rock Rb-Sr and zircon U-Pb geochronological data and Sm-Nd isotopic data are presented from the central magmatic arc domain of the Antarctic Peninsula in the area of northwest Palmer Land and southwest Graham Land, Rb-Sr isochrons indicate an ...
Flowerdew, Michael, Leat, Philip, Millar, Ian, Riley, Teal, Scarrow, J.H., Whitehouse, M.J.   +5 more
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Deciphering and Predicting Microscale Controls on Radon Production in Soils, Sediments and Rock [PDF]

, 2018
Soils, sediments and rock are natural sources of radon (Rn), which poses an ongoing threat to human health. Numerous studies have measured Rn release from bulk earth materials, yet few have examined microscale controls on Rn flux from solids (emanation),
Kocar, Benjamin David, Mehta, Neha
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Evaluation of some ceramic clays from Zambia [PDF]

, 1993
This reports details the technical evaluation of ceramic clays collected during visits to Zambia in 1990 and 1991 by the author (Clive Mitchell). The clay samples included: Choma kaolin (Southern Province), Twapia kaolin (Copperbelt Province), Kapiri ...
Mitchell, C.J.
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Pegmatites as a source of rare-metal and rare-earth mineralization within the Central and Western parts of the Ukrainian shield

Мінеральні ресурси України, 2018
Regularities in the distribution of rare-metal and rare-earth pegmatites within the Western and Central parts of the Ukrainian shield are determined.
A. P. Vasylenko, L. V. Isakov
doaj   +1 more source

Conditions of crystallization of granites and pegmatites of Tarbaganakhsky massif (Kuluarsky ridge, Verkhoyanye)

Известия высших учебных заведений: Геология и разведка, 2015
Compression during granite crystallization in the anticline arch leads to the formation of fluid- gneiss structures and separation of remanent pegmatite melt with its further moving to the periphery of the complex.
V. A. Utenkov, M. A. Fesenko
doaj   +1 more source

Geological setting, geochemistry and mineralogy of lithium bearing pegmatites in South Western Mali, West Africa; a review

Geology, Ecology, and Landscapes
The Bougouni region in southwestern Mali hosts lithium-bearing pegmatites within the Paleoproterozoic Birimian greenstone belt. These pegmatites are classified into lithium-poor and lithium-rich types.
Elhadji Mory Traore, Akinade S. Olatunji, Mory Sidibe, Sory I. M Konate, N’Tcha Daniel Kouagou N’dah, George Lemewihbwen Ngiamte   +5 more
doaj   +1 more source

Geology of the Northern Llano Uplift, Junction to Llano, Texas [PDF]

, 2016
This year\u27s Texas Academy of Science Geology Field Trip will visit nine interesting locations in two different areas in the Texas Hill Country (Figure 1). In the first area we will look at the Cretaceous stratigraphy around Junction, Texas (Figures 1,
Barker, Chris, Nielson, R. LaRell
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Radioanalytical Assessment and Mineral Chemistry Investigations in the Pegmatites of Eastern Desert, Egypt: Implications for Mining and Radiation Protection

Geosciences
This study is carried out to investigate the radiological characteristics and mineralogical controls of natural radioisotopes (238U, 226Ra, 232Th, and 40K) in granitic pegmatites from Abu Zawal Area (AZA) in the Eastern Desert of Egypt.
Mohamed M. Ghoneim, Mohamed Mitwalli, Hanaa A. El-Dokouny, Mai A. El-Lithy, Maher Dawoud, Yue-Yue Liu, Tariq Al-Abdullah, Abdelhalim S. Mahmoud   +7 more
doaj   +1 more source

Share on vk Share on google_plusone_share Share on twitter Share on email More Sharing Services Zonality of schorls from pegmatite veins of the Turkestan Range (Kyrgyzstan)

Учёные записки Казанского университета: Серия Естественные науки, 2018
In the course of a long-term field research within the borders of the Turkestan Range located in the southwestern part of Kyrgyzstan (high-altitude Tien Shan), pegmatite veins of a rare-metal genetic type have been found.
V.K. Gerasimov, L.A. Sergeeva, O.N. Lopatin, A.V. Mukhametshin   +3 more
doaj  

Geology of the Transverse Range Province, Southern California [PDF]

, 1954
The Transverse Range province of southern California is an elongate geomorphic and structural unit that trends essentially east-west across parts of Santa Barbara, Ventura, Los Angeles, San Bernardino, and Riverside Counties (pl. 4).
Bailey, Thomas L., Jahns, Richard H.
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