Results 21 to 30 of about 1,691 (151)

Carbonatites in skarn objects of the Urals

Литосфера, 2017
The temperature range of the formation of skarns suggests the melting of limestones in the heat-and-mass transfer columns of the Earth’s crust. The ontogenic analysis of structures of the carbonate rocks in some Ural skarn objects indicates the presence ...
V. A. Popov
doaj   +2 more sources

Petrology of skarns in the north and the southwest of Qazan (South Qamsar) with emphasis on the mineral chemistry of garnet and pyroxene [PDF]

پترولوژی, 2018
The Oligo-Miocene Qazan granitoid body caused contact metamorphic of surrounding rocks and skarn formation in the wall limestone. The main intrusive rocks are essentially granite to diorite in composition.
Maria Chavideh, Mohsen Tabatabaei Manesh, Mohammadali Makizadeh   +2 more
doaj   +1 more source

Skarns and Skarn Deposits of Turkey

, 2019
The skarns and skarn deposits, an important class of mineral deposits in Turkey, are formed during major periods of subduction, continental collision, and post-collisional evenst in response to the convergence between Eurasia and Afro-Arabia between Late
Kuşcu, İlkay, İlkay Kuşcu
core   +1 more source

A chromian tourmaline from Outokumpu, Finland [PDF]

Bulletin of the Geological Society of Finland, 1968
Chromian tourmaline, a member of the dravite group, has been encountered in the Cr-bearing skarns occuring between the serpentinites and quartzites in the Outokumpu area, in association with chrome-bearing silicates ang oxides.
E. Peltola, Y. Vuorelainen, T.A. Häkli
doaj   +1 more source

Mineral Chemistry Studies on Pyroxenes in Fe Skarns in the West of Elazığ (Turkey); Their Role in the Skarn Mineralization Process

Applied Sciences
This study presents the first detailed investigation of pyroxene zoning within polymetallic skarn zones of the Elazığ region. Skarns develop along contacts between plutonic rocks (diorite and granite) and carbonate rocks, forming two main zones ...
Necla Koprubasi, Ayşe Didem Kiliç, Ahmet Sasmaz   +2 more
doaj   +1 more source

Ti MINERALS IN ORES AND SKARNS OF THE AKTASH MAGNETITE-POLYMETALLIC DEPOSIT, WESTERN KARAMAZAR, TAJIKISTAN [PDF]

Минералогия
The article characterizes Ti minerals from different mineral assemblages of the Aktash magnetite-polymetallic deposit (Western Karamazar, Northern Tajikistan).
U.A. Yatimov, I.A. Blinov, M.A. Rassomakhin, S.M. Lebedeva, N.S. Safaraliev   +4 more
doaj   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology

Geostandards and Geoanalytical Research, EarlyView.
Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook, Bruno V. Ribeiro, Janne Liebmann, Kai Rankenburg, Fred Jourdan, Ahmad Redaa, Jarred C. Lloyd, Thomas M. Belgrano, Carlos R. Corella Santa Cruz, Yujin Jegal, Julien Mercadier, Catherine Zimmermann, Jie Yu, Andreas Zametzer, Christopher L. Kirkland, Sarah E. Gilbert, Craig D. Storey, Luc S. Doucet, Isabelle Jones, Louisa Stokes, Thomas Zack, Delia Rösel, Denis Fougerouse, Jonas Kaempf, Priyanjan Datta, Hijas Hameed, Noreen J. Evans, Malcolm P. Roberts, Juraj Farkas, Stijn Glorie, Celia Mayers, R. Adam Frew, Sarah Al Odeh, Chloe E. Roche, Massimo Chiaradia, Alicia M. Cruz‐Uribe, Alan S. Collins, Andreas Karlsson, Anusha Shantha Kumara   +38 more
wiley   +1 more source

Peculiarities of distribution and composition of betafite from different formations of the Aldan shield (Sakha-Yakutia)

Вісник Київського національного університету імені Тараса Шевченка. Серія Геологія, 2019
Character of Nb and Ta distribution in the different geological formations of the Aldan Shield are given in this article. To get idea about betafite from different endogenic etalon formations the authors analyzed its well known locations in the ...
V. Guliy, І. Poberezhska
doaj   +1 more source

Geochemical signs of magmatic commingling in the Dashkesan gabbro-granite intrusion (Dashkesan iron ore deposit, Azerbaijan)

Известия высших учебных заведений: Геология и разведка
Background. Geochemical signs of magmatic commingling are considered on the example of the Dashkesan Fe–Co deposit using geochemical data and mathematical modeling.Aim.
Е. А. Sadikhov, А. S. Desyatkin, А. А. Veliev, Е. К. Khmarin   +3 more
doaj   +1 more source