Results 51 to 60 of about 15,774 (268)

Ambiguities in Assigning Single‐Crystal NMR Data to Individual Atoms in the Crystal Structure: A Case Study of Hambergite, Be2$$ {}_2 $$BO3$$ {}_3 $$OH, by 9Be and 11B NMR Spectroscopy, XRD Measurements and DFT Calculations

Magnetic Resonance in Chemistry, EarlyView.
The fundamental question of how to assign NMR resonances to specific atoms in the unit cell is addressed by using the 9Be and 11B spectra of the natural mineral hambergite as a model system. ABSTRACT The NMR interaction tensors of 9Be and 11B of hambergite, Be2$$ {}_2 $$BO3$$ {}_3 $$OH, were derived from single‐crystal NMR experiments.
Jennifer Steinadler, Georg Krach, Kristian Witthaut, Tobias Stürzer, Rupert Hochleitner, Wolfgang Schnick, Thomas Bräuniger   +6 more
wiley   +1 more source

Quartz deformation characteristics, deformation temperature, and their constraints on pegmatites of the 509 Daobanxi lithium deposit in the West Kunlun area, Xinjiang

Dizhi lixue xuebao
Objective   The 509 Daobanxi deposit in the West Kunlun orogenic belt is a newly discovered large pegmatite-type lithium-polymetallic deposit in northwestern China.
HUO Hailong, CHEN Zhengle, ZHANG Qing, WANG Yong, MA Huadong, WANG Wei, ZHANG Wengao, LI Yong, HAN Fengbin, DU Xiaofei, MIN Zhuang, MENG Xiangpeng   +11 more
doaj   +1 more source

Chemical Discrimination of Rutile From Different Metamorphic Source Rocks: Dealing With Hierarchical Data Structures in Random Forest Classification

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Rutile provides a wealth of petrochronological information in metamorphic geology and due to its high stability during processes of the sedimentary cycle, rutile takes a special position in sedimentary provenance analysis. Besides being one of the classical minerals datable using the U–Pb system, rutile incorporates a broad range of trace ...
Jan Schönig, Thomas Zack, Delia Rösel, Raimon Tolosana‐Delgado, Horst Marschall, Hilmar von Eynatten, Nils Keno Lünsdorf, Mona Lueder, Matthias Konrad‐Schmolke, Jesse B. Walters   +9 more
wiley   +1 more source

Detecting Lithium (Li) Mineralizations from Space: Current Research and Future Perspectives

Applied Sciences, 2020
Optical and thermal remote sensing data have been an important tool in geological exploration for certain deposit types. However, the present economic and technological advances demand the adaptation of the remote sensing data and image processing ...
Joana Cardoso-Fernandes, Ana C. Teodoro, Alexandre Lima, Mônica Perrotta, Encarnación Roda-Robles   +4 more
doaj   +1 more source

First discovery of highly fractionated tourmaline-bearing leucogranite-pegmatite in Duxiushan, Anqing ore-cluster region, middle and lower Yangtze metallogenic belt: A clue to strategic metal exploration

Solid Earth Sciences, 2022
A suite of highly fractionated granites and associated pegmatite, were revealed through drill hole in the Anqing ore-cluster region in the Lower Yangtze River Belt (MLRB), Eastern China, for the first time. The pegmatite has abundant tourmaline.
Zhuang Zhao, Xiaoyong Yang, Beicai Zhang, Dongqing Wang, Jiancheng Xie, Tuyan Zhang, Wanying Li   +6 more
doaj   +1 more source

Rare-Metal Pegmatite Deposits of the Kalba Region, Eastern Kazakhstan: Age, Composition and Petrogenetic Implications

Minerals, 2020
The paper presents new geological, mineralogical, and isotope geochronological data for rare-metal pegmatites in the Kalba granitic batholith (Eastern Kazakhstan).
S. Khromykh, T. Oitseva, P. Kotler, B. A. D’yachkov, S. Smirnov, A. Travin, A. Vladimirov, E. Sokolova, O. Kuzmina, M. Mizernaya, B. Agaliyeva   +10 more
semanticscholar   +1 more source

A geophysical investigation of the Roter Kamm impact crater, Namibia

Meteoritics &Planetary Science, EarlyView.
Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus, Pritam Yogeshwar, Wiebke Mörbe, Bülent Tezkan, Yajun Liu, Bufelo Lushetile, Martin Melles   +6 more
wiley   +1 more source

Exhumation of the Koktokay rare-metal pegmatite group in the China Altai: insights from low-temperature thermochronology of the No. 3 pegmatite and Aler S-type granitic batholith

Frontiers in Earth Science
The China Koktokay Pegmatite Group is an important metallogenic region where major rare-metal ores are mined. Here, we present new low-temperature thermochronological data to contribute to the understanding of the Koktokay Pegmatite Group’s exhumation ...
Haoyu Wang, Haoyu Wang, Guangming Ren, Yong Tang, Hui Zhang, Zhenghang Lv, Zhilong Huang   +6 more
doaj   +1 more source

Environmental geochemistry and mineralogy of tantalum and niobium around a LCT pegmatite deposit of the Rudny Altai, East Kazakhstan [PDF]

, 2021
Laurent Richard, Mariya Shintassova, Assel Zhalgasbayeva   +2 more
openalex   +1 more source

Creating a Critical Zone: Feedbacks Between Bedrock Geology, Water Retention, and Vegetation on an Exposed Bedrock Surface, Panola Mountain, Georgia, USA

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 1, January 2026.
Abstract Most of Earth's present‐day terrestrial surface is covered by regolith—the layers of soil, saprolite, and weathered bedrock that together comprise the critical zone. Recent research has focused on understanding fluxes of minerals, water, and energy through the critical zone under steady state assumptions.
Sean P. Bemis, W. Steven Holbrook, Brady Flinchum, Jorden Hayes, Russell Callahan, Ciaran Harman, Brad Carr, Cliff Riebe   +7 more
wiley   +1 more source