Results 81 to 90 of about 6,151 (175)

Tourmalines from the Koktokay No.3 pegmatite, Altai, NW China: Spectroscopic characterization and relationships with the pegmatite evolution

, 2008
Mössbauer spectra (MS), infrared spectra (IR) in the OH stretching region, and reflectance spectra (RS) were obtained for natural tourmalines from the Koktokay No.3 pegmatite, the contact zone, and the altered country rock, Altai, NW China. Black Fe-rich
Zhang, A, Ji, J, Li, Y, Wang, R, Hu, H, Zhang, H, Lu, X   +6 more
core   +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

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

Pegmatite Contact - Black Mountain

, 1978
contact between pegmatite + country rocks Project Name: Kelley NGGDPP Grant 2019https://digitalmaine.com/mgs_geologic_field_photos/11980/thumbnail ...
Kelley, Joseph
core  

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

Big Creek pegmatite area, Carbon County, Wyoming

, 1961
Big Creek pegmatite area, Carbon County ...
R.S. Houston (10070053)
core   +1 more source

The Goulding–Keene nepheline pegmatite near Bancroft, Ontario

, 1976
The Goulding–Keene pegmatite consists essentially of albite, nepheline, and biotite with minor amounts of microline and other minerals. It is enclosed by plagioclase–nepheline–biotite–hastingsite–calcite gneisses and is apparently intrusive into these ...
E. J. Reeve, G. M. Anderson
core   +1 more source

Fluorapatite from a Pegmatite with Miarolitic Cavities in the Larsemann Hills, East Antarctica: ID-TIMS U-Pb Ages and LA-ICP-MS Trace-Element Constraints on the Late Pan-African Orogenic Evolution

Geosciences
Pegmatites with miarolitic cavities have not previously been reported from the Larsemann Hills, East Antarctica, and their age and origin remain poorly constrained.
Ivan A. Babenko, Nailya G. Rizvanova, Sergey G. Skublov, Yuri A. Bishaev, Irina V. Talovina, Olga L. Galankina, Alexander V. Kuznetsov   +6 more
doaj   +1 more source

Harding Pegmatite mine - quarry face

, 1950
Quarry faced showing large lath-like crystals of spodumene in ...

core