Results 31 to 40 of about 16,247 (260)

Radiometric ages and other isotopic data bearing on the evolution of Archaean crust and ores in the Kuhmo-Suomussalmi area, eastern Finland [PDF]

Bulletin of the Geological Society of Finland, 1999
The Archaean greenstone-gneiss terrain in the Kuhmo-Suomussalmi district in eastern Finland has been isotopically studied in connection with regional bedrock mapping and local mineral exploration projects.
M. Vaasjoki, K. Taipale, I. Tuokko
doaj   +1 more source

The inclusion of grothite in the zircon from granitoids of the crystalline basement of the Southern Yamal Peninsula

Vestnik MGTU, 2019
Grothite – rare F-Al-rich type of titanite – has been found in accessory zircon from the granitoids of the pre-Jurassic basement of the Verkhnerechensky oil-gas area (in the southern part of the Yamal Peninsula) as a result of the study.
Erokhin Yu. V., Ivanov K. S. , Khiller V. V.   +2 more
doaj   +1 more source

Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes [PDF]

, 2017
The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period.
Abrevaya, Ximena Celeste, Chaffin, Michael S., Conti, Maria Josiane, Navarro, Margareth Sugano, Novoselov, Alexey A., Schneider, Jerusa, Serrano, Paloma, Silva, Dailto, Souza Filho, Carlos Roberto de   +8 more
core   +1 more source

Timing of carbonatite-hosted U-polymetallic mineralization in the supergiant Huayangchuan deposit, Qinling Orogen: Constraints from titanite U–Pb and molybdenite Re–Os dating

Geoscience Frontiers, 2020
The newly-discovered supergiant Huayangchuan uranium (U)-polymetallic (Sr, Se, REEs, Ba, Nb and Pb) deposit is located in the Qinling Orogen, central China.
Hui Zheng, Huayong Chen, Li Dengfeng, Chao Wu, Xi Chen, Chunkit Lai   +5 more
semanticscholar   +1 more source

Titanite Mineralization of Microbial Bioalteration Textures in Jurassic Volcanic Glass, Coast Range Ophiolite, California

Frontiers in Earth Science, 2019
Volcanic glasses are rarely preserved in the rock record, and the quality of preservation generally declines with increasing age. Records preserved in ancient basaltic glasses therefore provide important links between processes operating in the distant ...
Matthew R. M. Izawa, Matthew R. M. Izawa, Neil R. Banerjee, John W. Shervais, Roberta L. Flemming, Callum J. Hetherington, Karlis Muehlenbachs, Cynthia Schultz, Debarati Das, Barry B. Hanan   +9 more
doaj   +1 more source

Compositional Variations of Titanite: A Possible New Tool for Cyprus-Type Volcanogenic Massive Sulfide Deposit Prospecting

Geosciences, 2020
Titanite in submarine mafic magmatic rocks of Neotethyan origin was studied to reveal its possible use as an indicator mineral of modern Cyprus-type VMS deposits.
Gabriella B. Kiss, Federica Zaccarini
doaj   +1 more source

The effect of titanite crystallisation on Eu and Ce anomalies in zircon and its implications for the assessment of porphyry Cu deposit fertility

, 2017
The redox sensitivity of Ce and Eu anomalies in zircon has been clearly demonstrated by experimental studies, and these may represent an important tool in the exploration for porphyry Cu deposits which are thought to be derived from oxidised magmas ...
M. Loader, J. Wilkinson, R. Armstrong
semanticscholar   +1 more source

Reworked Precambrian metamorphic basement of the Lhasa terrane, southern Tibet: Zircon/titanite U–Pb geochronology, Hf isotope and geochemistry

Precambrian Research, 2020
Due to the paucity of exposure, the formation and evolution of the Precambrian basement of the Lhasa terrane remain poorly known. Here we report zircon and titanite in situ U–Pb ages, bulk-rock geochemical and zircon Hf isotopic data on the orthogneisses
Xin Dong, Zeming Zhang, Y. Niu, Z. Tian, L. Zhang   +4 more
semanticscholar   +1 more source

Nature and timing of anatectic event of the Hida Belt (Japan): Constraints from titanite geochemistry and U-Pb age of clinopyroxene-bearing leucogranite

, 2021
The Hida Belt, central Japan, is a continental fragment, which was once a part of the crustal basement of the East Asian continental margin. It consists mainly of Permo-Triassic granite-gneiss complexes with both syn-to-late-metamorphic migmatite or ...
Hironobu Harada, T. Tsujimori, Y. Kon, S. Aoki, K. Aoki   +4 more
semanticscholar   +1 more source

Geochemical behavior of chromium in minerals of high-Mg rocks, associated with granitoid massifs of the Urals

Литосфера, 2019
Research subject. High-magnesium rocks associated with the granitoid massifs of the Urals are represented by gabbro-diorites and their melanocratic varieties (hornblendites), as well as by diorites and quartz diorites.
S. V. Pribavkin, G. A. Кallistov, Т. A. Оsipova, I. A. Gottman, E. A. Zin’kova   +4 more
doaj   +1 more source