Results 141 to 150 of about 782,637 (367)

Geological and geochemical characteristics and genesis of the Cishan gold deposit in Tongling ore cluster area, Anhui Province

Solid Earth Sciences, 2020
The Cishan gold deposit is a newly discovered medium-scale independent skarn gold deposit located in the Tongling ore cluster area of the Middle-Lower Yangtze Metallogenic Belt, and the ore-related intrusion is the Cishan pyroxene diorite. In this study,
Shasha Liu, Xiaoyong Yang, Linjie Chen, Yinan Li, Kai Zheng, Yu Hong   +5 more
doaj  

Giant Quasi-Ring Mantle Structure in the African–Arabian Junction: Results Derived from the Geological–Geophysical Data Integration [PDF]

, 2021
Lev Eppelbaum, Zvi Ben‐Avraham, Yu. I. Katz, Sierd Cloetingh, Mikhail K. Kaban   +4 more
openalex   +1 more source

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai, B.G.J. Upton, Bonadiman, C. Bonadiman, Greenbaum, Griffin, H. Downes, Irving, Johnson, Kirstein, L.A. Kirstein, Larsen, Macdonald, McDonough, Menzies, P.G. Hill, Singh, T. Ntaflos   +17 more
core   +1 more source

The Distribution of Major and Trace Elements Across a Garnet Population From the Kalak Nappe Complex (Finnmark, Scandinavian Caledonides): Evidence for Size‐Dependent Growth and Compositional Equilibration in the Garnet Zone

Journal of Metamorphic Geology, EarlyView.
ABSTRACT A garnet population from the lower Kalak Nappe Complex in Finnmark (Arctic Norway) was characterized using high‐resolution X‐ray micro‐computed tomography, electron probe micro‐analysis and laser ablation inductively coupled plasma mass spectrometry mapping to assess the extent of compositional equilibration and the controlling crystallization
M. T. A. G. Yogi, F. Gaidies, O. K. A. Heldwein, A. H. N. Rice   +3 more
wiley   +1 more source

A New Basis of Geoscience: Whole-Earth Decompression Dynamics [PDF]

arXiv, 2013
Neither plate tectonics nor Earth expansion theory is sufficient to provide a basis for understanding geoscience. Each theory is incomplete and possesses problematic elements, but both have served as stepping stones to a more fundamental and inclusive geoscience theory that I call Whole-Earth Decompression Dynamics (WEDD).
arxiv  

Uranium Redox and Deposition Transitions Embedded in Deep‐Time Geochemical Models and Mineral Chemistry Networks

Geochemistry, Geophysics, Geosystems
Uranium (U) is an important global energy resource and a redox sensitive trace element that reflects changing environmental conditions and geochemical cycling. The redox evolution of U mineral chemistry can be interrogated to understand the formation and
E. K. Moore, J. Li, A. Zhang, J. Hao, S. M. Morrison, D. R. Hummer, N. Yee   +6 more
doaj   +1 more source

Geology, fluid inclusions, mineral and (S-O) isotope chemistry of the Badran orogenic Au deposit, Yana-Kolyma belt, eastern Siberia: implications for ore genesis

Frontiers in Earth Science
The Badran orogenic gold deposit is located in the Yana-Kolyma belt, Eastern Siberia; it has proven reserves of ∼9.3 t of gold and an average grade of 7.8 ppm. The total gold production at the Badran deposit since 1984 amounts to ∼34 t.
Valery Fridovsky, Sergey Kryazhev, Sergey Kryazhev, Lena Polufuntikova, Maxim Kudrin, Galina Anisimova   +5 more
doaj   +1 more source

Post-collisional, Potassic and Ultrapotassic Magmatism of the Northern Tibetan Plateau: Constraints on Characteristics of the Mantle Source, Geodynamic Setting and Uplift Mechanisms

, 2006
. Arnaud, N. O., Vidal, Ph., Tapponnier, P., Matte, Ph. & Deng, W. M. (1992). The high K2O volcanism of northwestern Tibet: geochemistry and tectonic implications. Earth and Planetary Science Letters 111, 351–367.
Zhengfu Guo, M. Wilson, Jia-qi Liu, Q. Mao   +3 more
semanticscholar   +1 more source

Seismic anisotropy of Precambrian lithosphere : Insights from Rayleigh wave tomography of the eastern Superior Craton [PDF]

, 2017
The seismic data used in this study are freely available from the CNDC (Canadian National Data Centre for Earthquake Seismology and Nuclear Explosion Monitoring) and IRIS DMC (Data Management Center) via their data request tools.
Lee S., Nolet G., Sato Y., Snieder R., Vinnik L., Wardle R. J.   +5 more
core   +2 more sources

Out‐of‐Sequence Nucleation in a Blueschist From Syros, Greece

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Two samples of garnet + glaucophane + chloritoid + phengite + paragonite + quartz + epidote + rutile schist from the Cycladic Blueschist Unit of Syros, Greece, have been examined in detail in order to constrain the paragenetic sequence and to infer the processes and time scales for metamorphic recrystallization.
Frank S. Spear, Megan M. Koch
wiley   +1 more source