Results 71 to 80 of about 54,225 (159)

Kindberg, the fifth meteorite fall in Austria: A weakly shocked L6 chondrite breccia with high‐pressure phases

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 17-38, January 2026.
Abstract A bright fireball was seen at 4:46 a.m. CET on November 19, 2020, over Austria, and also eye witnessed in Italy and Germany. The resulting Kindberg meteorite was the fifth well‐approved meteorite fall in Austria, and all rocks represent ordinary chondrites.
Addi Bischoff, Maximilian P. Reitze, Julia Roszjar, Markus Patzek, Jean‐Alix Barrat, Jasper Berndt, Tommaso Di Rocco, Andreas Pack, Iris Weber   +8 more
wiley   +1 more source

Rare earth element and Sr-Nd isotopic evidence for the origin of fluorite from the Silius vein deposit (southeastern Sardinia, Italy)

, 2020
Rare earth element (REE) and Y contents along with Sr-Nd isotopic ratios have been determined in fluorite and calcite samples from the two main veins of the Silius deposit, hosted in Lower Paleozoic metavolcanic rocks, in southern Sardinia. Fluorite from
Masi U., Gorello I., Castorina F.
core   +1 more source

Mineral chemistry of monazite-(Nd), xenotime-(Y), apatite, fluorite and zircon hosting in lamprophyre dyke in Abu Rusheid area, South Eastern Desert, Egypt

Geologija, 2012
The studied mineralized lamprophyre dyke in Abu Rusheid area is trending NNW-SSE, and occurs withinAbu Rusheid mineralized shear zone, measuring 0.2 - 1.0 m in width and 0.5 - 1.0 km in length. It was emplacedparallel with the Abu Rusheid shear zone. The
Mohamed A. Ali
doaj  

Geochemical characteristics of mercurian tetrahedrite, barite and fluorite from the Duboki Vagan, Glumac and Dubrave-Dugi Dol barite deposits, south of Kreševo, Mid-Bosnian Schist Mts.

Geologia Croatica, 2011
The geochemical characteristics of tetrahedrite and barite of the Duboki Vagan barite deposit near the town of Kreševo in the MBSM (Mid-Bosnian Schist Mountains) have been determinated and correlated with the results of previously studied barite ...
Ivan B. Jurković, Vesnica Garašić, Ivan Jurković   +2 more
doaj   +1 more source

PHY SICO-CHEMICAL CHARACTERISTICS OF MINERALIZING FLUIDS AT THE KAMARMEHDI MINE, TABAS REGION, IRAN [PDF]

Journal of Sciences, Islamic Republic of Iran, 1998
The data obtained from field and geothermometric studies and also the REE composition of fluorites associated with lead mineralization at the Kamar-Mehdi mine are compatible with a structurally controlled, fissure filling, epigenetic, hydrothermal origin.
doaj  

Geochemistry and genesis of dolomite reservoirs in the upper-middle Majiagou Formation (Ordovician), Yan’an Gas Field, Ordos Basin, China

Open Geosciences
Dolostone reservoirs in the Upper–Middle Member of the Ordovician Majiagou Formation (Yan’an Gas Field, Ordos Basin) host significant natural gas resources, yet their origin remains enigmatic.
Wang Meng, Wu Xiaobin, Gao Qiyu, Jia Fangfang, Qian Zhaoliang, Wei Qinlian   +5 more
doaj   +1 more source

Pseudomorphism of alkali feldspar to biotite from the alkaline nana complex granite in Cameroon

Discover Geoscience
Alkaline complexes all over the world generally are enriched in high–field strength elements and rare earth elements. This enrichment can be accounted for by magmatic processes, but, many of these complexes display evidence of hydrothermal alteration. In
Pauline Nguet Wokwenmendam, Emmanuel Njonfang, Amidou Moundi, Benjamin Ntieche, Caroline Neh Ngwa, Zakari Nchouwet, Domenico Cozzupoli   +6 more
doaj   +1 more source

Geology, mineralization and geochemistry of the Aqkand Cu occurrence (north of Zanjan, Tarom-Hashtjin zone)

Journal of Economic Geology, 2017
Introduction The Aqkand Cu occurrence, 48 km north of Zanjan, is located in the Tarom subzone of the Western Alborz-Azerbaijan structural zone. Apart from small scale geological maps of the area, i.e., 1:250,000 geological maps of Bandar-e-Anzali ...
Maryam Feyzi, Mohammad Ebrahimi, Hossein Kouhestani, Mir Ali Asghar Mokhtari   +3 more
doaj   +1 more source

Rare Earth Mineral Concentrations in Ultramafic Alkaline Rocks and Fluorite Within the Illinois-Kentucky Fluorite District: Hicks Dome Cryptoexplosive Complex, Southeast Illinois and Northwest Kentucky (USA) Proceedings of the 47th Forum on the Geology of

, 2020
The rare earth elements (REE) are composed of the Lanthanide Series of 15 elements with atomic numbers (57) through (71) and yttrium (39). Because of their geochemical behavior, REE rarely form their own minerals and more commonly are found incorporated ...
F B Denny, R N Guillemette, L Lefticariu
core  

Geochemistry of fluorite mineralization in Kaman, Kirsehir, Turkey

, 2003
Fluorite occurs within syenite, nepheline-syenite, and monzo-syenite in the study area, which includes Bayindir, Isahocali. Yeniyapan, and Alisar of Kaman area, Kirsehir, Turkey.
Koc, S, Ozmen, O, Dogan, AU
core