Results 111 to 120 of about 2,657,206 (280)

Recycled Oceanic Crust in the Source of the Intraplate Changbaishan‐Tianchi Volcano, China/North Korea

Geochemistry, Geophysics, Geosystems
Continental intraplate volcano is an ideal probe to unravel the composition and structure of the deep Earth. The intraplate Changbaishan‐Tianchi volcano was one of the most hazardous eruptions on the Earth's planet. The long‐term activity of this volcano
Yujie Liu, Chao Zhang, Hang Xu, Li‐Hui Chen, Bo Pan   +4 more
doaj   +1 more source

LATE NEOPROTEROZOIC RARE-METAL LEUCOGRANITE FROM THE KHARIUSIKHA MASSIF OF YENISEI RIGDE: GENESIS AND RELATIONSHIP TO MAGMATISM OF A LARGE IGNEOUS PROVINCE

Геодинамика и тектонофизика
The paper deals with the petrogeochemical composition and U-Pb (SHRIMP-II) age (753±6 Ma) of subalkaline leucogranites and syenites from the Khariusikha massif of the Yenisei Ridge, which contain rare-metal mineralization.
A. D. Nozhkin, O. M. Turkina
doaj   +1 more source

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

Geological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia, Ryohei Takahashi, Andrea Agangi, Pearlyn Manalo, Hinako Sato   +4 more
wiley   +1 more source

Isotopic and Geochemical Features of High-Hafnium Zircons of the Vasin-Mylk LCT Pegmatite, Kola Peninsula: Compositional Zoning and Crystallization Conditions

Geosciences
A comprehensive investigation was conducted on high-hafnium zircons from the LCT (Li-Cs-Ta) pegmatites of the Vasin-Mylk rare-metal deposit within the Fennoscandian Shield.
Ekaterina V. Kovalenko (Levashova), Nikolai M. Kudryashov, Sergey G. Skublov, Vladislav G. Kurichev, Xian-Hua Li   +4 more
doaj   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Remelting of Ordovician migmatites and granites during Variscan high-grade metamorphism (Aar Massif, Central Alps, Switzerland) [PDF]

Swiss Journal of Geosciences
The remelting of felsic gneisses, migmatites and granite during a later orogenic cycle can produce rocks of different age with comparable field appearance, microstructure, mineralogical and chemical composition.
Urs Schaltegger, Alfons Berger, Jürgen Abrecht, Alexey Ulianov, Eliana Noroña Muñoz, Daniela Rubatto, Maria Ovtcharova, Agathe Martignier, Richard Spikings, Michael Wiederkehr   +9 more
doaj   +3 more sources

A boundary exchange influence on deglacial neodymium isotope records from the deep western Indian Ocean [PDF]

, 2012
24.02.14 KB.
Galy, A., McCave, IN, Piotrowski, AM, Wilson, D. J., McCave, I. N., Galy, A, Wilson, DJ, Piotrowski, A. M.   +7 more
core   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

Not all supercontinents are created equal : Gondwana-Rodinia case study [PDF]

, 2013
The geologic records associated with the formation of the supercontinents Rodinia and Gondwana have markedly different seawater Sr and zircon Hf isotopic signatures.
Hawkesworth, Chris, Spencer, Christopher, Hawkesworth, C.J., Dhuime, B., Cawood, Peter A., Spencer, Christopher J., Dhuime, Bruno, Cawood, P.A.   +7 more
core   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source