Results 61 to 70 of about 13,641 (263)

Application of μ-XRF in Uranium Mineralogy of the Huanglongpu Carbonate-type Molybdenum Deposit, Shaanxi Province, China

Yankuang ceshi, 2022
BACKGROUND The carbonatite-type molybdenum metallogenic belt in East Qinling is the largest molybdenum metallogenic belt in the world. The Huanglongpu deposit is one of the earliest discovered carbonatite-type molybdenum deposits in China.
ZHANG Yi-yang, ZHONG Fu-jun, DU Jing-yong, YAN Jie, PAN Chun-rong, HUANG Hui, KANG Qing-qing, PAN Jia-yong   +7 more
doaj   +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

Slab melting as a barrier to deep carbon subduction [PDF]

, 2016
Interactions between crustal and mantle reservoirs dominate the surface inventory of volatile elements over geological time, moderating atmospheric composition and maintaining a lifesupporting planet1.
A Gale, A Rohrbach, AM Martin, Andrew R. Thomson, AR Thomson, B Debret, B Harte, C Gerbode, CE Manning, CE Manning, DA Zedgenizov, DM Kerrick, E Watson, EM Syracuse, ES Kiseeva, ES Kiseeva, F Schilling, G Bulanova, GM Yaxley, GP Brey, J Alt, J Hernlund, JAD Connolly, JF Molina, JJ Ague, K Litasov, K Litasov, K Nakamura, K Okamoto, K Zahnle, KA Kelley, L Coogan, L Coogan, MG Jackson, Michael J. Walter, MJ Walter, MJ Walter, MJ Walter, MJ Walter, NH Sleep, P McDade, R Dasgupta, R Dasgupta, R Dasgupta, R Kessel, RB Ickert, RC Newton, RC Newton, RC Newton, Richard A. Brooker, RW Luth, S Ghosh, S Keshav, S Poli, S Shilobreeva, Simon C. Kohn, SS Shcheka, T Hammouda, T Hammouda, T Stachel, V Stagno, V Stagno   +61 more
core   +3 more sources

Vesicularity, bubble formation and noble gas fractionation during MORB degassing

, 2013
The objective of this study is to use molecular dynamics simulation (MD) to evaluate the vesicularity and noble gas fractionation, and to shed light on bubble formation during MORB degassing.
Aubry, G., Guillot, B., Sator, N.
core   +2 more sources

MINERALOGY AND ZIRCON AGE OF CARBONATITES OF THE SREDNYAYA ZIMA COMPLEX (EASTERN SAYAN)

Геодинамика и тектонофизика
The Srednyaya Zima alkaline-ultramafic carbonatite complex is located in the Eastern Sayan and is a part of the area of manifestation of Neoproterozoic rare-metal alkaline-carbonatite magmatism along the southern and southeastern margins of the Siberian ...
I. R. Prokopyev, A. G. Doroshkevich, M. D. Varchenko, D. V. Semenova, I. A. Izbrodin, M. N. Kruk   +5 more
doaj   +1 more source

U-Pb dating of niobium minerals from the pyrochlore group (Ilmeny-Vishnevogorsky carbonatite-miaskite complex, South Urals)

Литосфера, 2020
The article covers the U-Pb dating of minerals belonging to the pyrochlore group from the rare-metal ore deposits of Ilmeny-Vishnevogorsky carbonatite-miaskite complex (South Urals). Individual pyrochlore crystals were dated through a new technique of in-
I. L. Nedosekova, V. A. Koroteev, B. V. Belyatsky, V. V. Sharygin, Е. N. Lepechinа, S. V. Pribavkin   +5 more
doaj  

Zirconium stable isotope analysis of zircon by MC-ICP-MS: Methods and application to evaluating intra-crystalline zonation in a zircon megacryst [PDF]

, 2020
Zirconium (Zr) plays a key role in the development of phases like zircon (ZrSiO₄) and baddeleyite (ZrO₂) in magmatic systems. These minerals are crucial for the study of geologic time and crustal evolution, and their high resistivity to weathering and ...
Ibanez-Mejia, Mauricio, Tissot, François L. H., Tompkins, Hannah G. D., Zieman, Lisa J.   +3 more
core  

Petrogenesis of Eocene Tamazert continental carbonatites (Central High Atlas, Morocco): implications for a common source for the Tamazert and Canary and Cape Verde Island carbonatites [PDF]

, 2010
The Tamazert Eocene alkaline complex of the Central High Atlas Range of Morocco hosts the largest outcropping occurrences of carbonatites in northern Africa.
A. Kchit, A. Klugel, ANOVITZ, BAILEY, Coulson, D. Lowry, Duggen, F. Hauff, G. Beaudoin, Gomez, K. Hoernle, Keppler, Lentz, M. Bouabdellah, Oyarzun, S. Duggen, Salvi, Smith, WAGNER, Zindler   +19 more
core   +1 more source

Late Triassic Hydroclimatic Changes in Central China Linked to Evolving Mountain Topography

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract During the Late Triassic, tropical Pangea drifted northward into subtropical latitudes and became progressively drier. In contrast, South China, despite experiencing a similar latitudinal shift, transitioned from an arid to humid climate. Based on the sedimentary record of the Zigui Basin, this study constrains the arid to humid climatic shift
Rong Chai, Jianghai Yang, Peter A. Cawood, Chenguang Zhu, Yuansheng Du, Yongyun Hu, Xiang Li, Chengshan Wang   +7 more
wiley   +1 more source

East Meets West: The Trace of the Mesoproterozoic Kibaran Event in the Mantle Lithosphere Beneath Eastern Tanzania

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We present elemental geochemistry and multiple isotopic systematics (Re‐Os, Lu‐Hf, Sm‐Nd and Sr) for mantle peridotite xenoliths from Lashaine in northern Tanzania. We use the data to examine how the major Proterozoic tectono‐thermal events that affected the crust of the western Tanzanian craton are imprinted on the lithospheric mantle in the ...
Sheng‐Hua Zhou, Qiao Shu, Sally A. Gibson, Hong‐Fu Zhang, Jing‐Jing Zhu, Hélène Legros, D. Graham Pearson   +6 more
wiley   +1 more source