Results 31 to 40 of about 6,856 (206)

Mantle heterogeneity during the formation of the North Atlantic Igneous Province: Constraints from trace element and Sr-Nd-Os-O isotope systematics of Baffin Island picrites [PDF]

, 2004
Sr-Nd-Os-O isotope and major and trace element data from ~62 Ma picrites from Baffin Island constrain the composition of mantle sources sampled at the inception of North Atlantic Igneous Province (NAIP) magmatism.
Eiler, J., Francis, D., Frei, R., Kent, A. J. R., Stolper, E. M., Woodhead, J.   +5 more
core   +1 more source

Fenites associated with carbonatite complexes : a review [PDF]

, 2017
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.Carbonatites and alkaline-silicate rocks are the most important sources of rare earth elements (REE) and niobium (Nb), both of which are ...
A.A. Finch, A.R. Chakhmouradian, Afanasyev, Al Ani, Al Ani, Andersen, Andersen, Andersen, Appleyard, Arzamastev, Arzamastsev, Bailey, Bardina, Bazhenov, Bazhenov, Becke, Bodeving, Borst, Bowden, Brady, British Geological Survey, Broom-Fendley, Brögger, Burnham, Burnham, Bussell, Bühn, Bühn, Bühn, Carmichael, Cartwright, Castor, Chakhmouradian, Chakhmouradian, Chakhmouradian, Clarke, Cooper, Currie, Dahlgren, Deans, Dominy, Doroshkevich, Dowman, Drüppel, E. Deady, E. Dowman, Elliott, Engell, Es’kova, Evdokimov, F. Wall, Ferguson, Fettes, Finch, Fitton, Garson, Garson, Giehl, Giehl, Goodenough, Gorstka, Grant, Graser, Gresens, Gupta, H.A.L. Elliott, Haas, Haggerty, Harlov, Harlov, Harmer, Harmer, Hedenquist, Heinrich, Heinrich, Heinrich, Hogarth, Hogarth, Hogarth, Hornig-Kjarsgaard, Jackson, Johnson, Jones, Kelemen, Khamrabayev, King, Kjarsgaard, Kogarko, Kogarko, Konnerup-Madsen, Korzhinskii, Kovalenko, Kozlov, Kramm, Kramm, Kramm, Kresten, Kresten, Kruger, Krumrei, Kusebauch, Kwak, Le Bas, Le Bas, Le Bas, Le Bas, Le Maitre, Leake, Leake, Lee, Linnen, M.A.W. Marks, Mariano, Marien, Markl, Markl, Marks, Marks, Marks, Martin, McKie, Meinert, Meinert, Migdisov, Mikhailova, Misra, Mitchell, Moore, Morogan, Morogan, Morogan, Morogan, Nedosekova, Newton, Ngwenya, Notholt, Nurlybaev, Ortoleva, O’Brien, P.R. Siegfried, Palmer, Pfaff, Pirajno, Pirajno, Platt, Prokopyev, Putnis, Ray, Reid, Robb, Robins, Rosatelli, Rubie, Rubie, S. Dahlgren, S. Weatherley, Sachau, Samson, Sarapää, Schilling, Sillitoe, Sindern, Skelton, Smith, Stemprok, Sutherland, Sutherland, Sutherland, Swinden, Sæther, Thompson, Tilley, Timofeev, Traversa, Treiman, Tsay, Tuttle, Ugryumov, Vartiainen, Verschure, Verwoerd, Viladkar, Viladkar, Viladkar, von Eckermann, Wall, Wall, Williams-Jones, Williams-Jones, Wimmenauer, Winter, Wood, Woolley, Woolley, Woolley, Woolley, Woolley, Woolley, Woolley, Woolley, Xie, Xu, Zaraiskii, Zharikov   +203 more
core   +6 more sources

U-Th-He Geochronology of Pyrite from Alteration of the Au-Fe-Skarn Novogodnee-Monto Deposit (Polar Urals, Russia)—The Next Step in the Development of a New Approach for Direct Dating of Ore-Forming Processes

Geosciences, 2021
We report on the application of the U-Th-He method for the direct dating of pyrite from the alteration halo of the Novogodnee-Monto Au-Fe-skarn deposit, Polar Urals.
Olga Yakubovich, Ilya Vikentyev, Ekaterina Ivanova, Mary Podolskaya, Ivan Sobolev, Eugenia Tyukova, Alexander Kotov   +6 more
doaj   +1 more source

The geochemistry and element mobility during albitization and related uranium mineralization, Rohil deposit, Rajasthan, India

Discover Geoscience
The albitite-hosted, Mesoproterozoic Rohil uranium deposit (Latitude: 27° 33′ 25ʺ N; Longitude: 75° 29′ 25ʺ E) is located in the Sikar district, Rajasthan of Western India.
Debalin Rout, Rajagopal Krishnamurthi, Ambika Prasad Kushwaha, Shailendra Kumar Sharma   +3 more
doaj   +1 more source

Apatite in Bennu samples indicates multiple stages of aqueous alteration

Meteoritics &Planetary Science, EarlyView.
Abstract Calcium phosphates are ubiquitous in planetary materials, including samples returned from asteroid Bennu by the OSIRIS‐REx mission. We characterized apatite [Ca5(PO4)3(F,Cl,OH)] grains in Bennu samples by scanning electron microscopy, electron microprobe analysis, and transmission electron microscopy to investigate their compositions, mineral ...
Laura B. Seifert, T. M. Erickson, L. P. Keller, J. J. Barnes, K. Thomas‐Keprta, L. Le, J. Gorce, Z. Rahman, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +10 more
wiley   +1 more source

Sandyites and rocks of monzonite composition of the Ilmenogorsk miaskit massive (the Southern Urals)

Литосфера, 2017
The results of study of rocks of the Ilmenogorsk miaskite block - mylonitized miaskites, “sandyites” and monzonitic rocks, which were found for the first time, are presented in the paper.
B. Nemov Andrey, V. Medvedeva Elena, A. Kotlyarov Vasily   +2 more
doaj   +1 more source

Theoretical petrology [PDF]

, 1979
The central issues in petrology have remained remarkably unchanged in the last 50 years. In igneous petrology, the focus is on understanding the nature and cause of diversity in igneous rocks: on identifying primary magma types and constraints on the ...
Stolper, Edward
core   +1 more source

Distribution of Fenitized Crustal Xenoliths in Carbonatite Intrusions, West-Central Arkansas [PDF]

, 1981
Crustal xenoliths from carbonatite intrusions in the Morrilton-Perryville Arkansas area display a variety of mineralogical and textural features that suggest that they are fragments of basement crystalline rock that has undergone sodic metasomatism ...
Sharp, John
core   +2 more sources

Fluid-induced high-temperature metasomatism at Rundvågshetta in the Lützow-Holm Complex, East Antarctica: Implications for the role of brine during granulite formation [PDF]

, 2018
We report new petrological, phase equilibria modeling, and fluid inclusion data for pelitic and mafic granulites from Rundvågshetta in the highest-grade region of the Neoproterozoic Lützow-Holm Complex (LHC), East Antarctica, and provide unequivocal ...
Takahashi Kazuki, Tsunogae Toshiaki, Ugwuonah Emmanuel Nwachukwu, 角替 敏昭   +3 more
core   +2 more sources

A specialized topaz-bearing rapakivi granite and associated mineralized greisen in the Ahvenisto complex, SE Finland [PDF]

Bulletin of the Geological Society of Finland, 1991
The Ahvenisto rapakivi complex is a satellite northwest of the large Wiborg rapakivi batholith in Southeastern Finland. The rapakivi rocks are surrounded by rapakivi-age gabbros, anorthosites, monzodiorites and diabases.
P. Edén
doaj   +1 more source