Results 51 to 60 of about 40,674 (250)
Advances in seismic imaging of mantle transition zone discontinuities
地球与行星物理论评, 2023 Located between the 410-km and 660-km discontinuities, the mantle transition zone is the key region for understanding the thermal and chemical structure and the dynamic evolution of the Earth’s mantle.
Chunquan Yu +3 more
doaj +1 more source
Evolving force balance during incipient subduction [PDF]
, 2004 Nearly half of all active subduction zones initiated during the Cenozoic. All subduction zones associated with active back arc extension have initiated since the Eocene, hinting that back arc extension may be intimately associated with an interval ...
Gurnis, Michael, Hall, Chad, Lavier, Luc
core +1 more source
Geological Journal, EarlyView.Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley +1 more source
Geochemistry, Geophysics, Geosystems, 2023 At Mid‐Ocean Ridges, hot, reduced, acidic, and metal‐rich fluids are responsible for the formation of ultramafic‐hosted seafloor massive sulfide deposits (UM‐SMSs), where mantle exhumation efficiently operates.
R. Coltat +5 more
doaj +1 more source
Petrogenetic processes in the ultramafic, alkaline and carbonatitic magmatism in the Kola Alkaline Province: a review [PDF]
, 2005 Igneous rocks of the Devonian Kola Alkaline Carbonatite Province (KACP) in NW Russia and eastern Finland can be classified into four groups: (a) primitive mantle-derived silica-undersaturated silicate magmas; (b) evolved alkaline and nepheline syenites; (
Balaganskaya, E. +4 more
core +1 more source
Journal of Quaternary Science, EarlyView.ABSTRACT Mount Erciyes, the largest active volcano of Central Anatolia (Turkey), erupted explosively during the Holocene, producing the Karagüllü, Perikartin and Dikkartin tuff rings. Even though major cities like Kayseri and its ~1 million residents sit directly on these pyroclastic deposits, the timing and magnitude of the explosive eruptions have ...
Ivan Sunyé‐Puchol +12 more
wiley +1 more source
The role of CO2 in the genesis of Dabie-type porphyry molybdenum deposits
Nature CommunicationsPorphyry-type molybdenum deposits, many of which are in China, supply most of the World’s molybdenum. Of particular importance are the molybdenum deposits located in the Qinling-Dabie region that are responsible for more than half of China’s molybdenum ...
Zi-Qi Jiang +7 more
doaj +1 more source
A Novel Approach to Identifying Mantle‐Equilibrated Zircon by Using Trace Element Chemistry
Geochemistry, Geophysics, Geosystems, 2020 One of the requirements for inferring mantle redox states via zircon Ce/Ce* oxybarometry and Ti‐in‐zircon thermometry is to select mantle‐equilibrated zircon derived from melts that have not interacted with the hydrosphere nor assimilated exogenous ...
Ziqin Ni +3 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2021 Africa's Cenozoic tectonism is often attributed to mantle plumes, particularly below East Africa, but their morphology, number, location, and impact on the African lithosphere are debated.
A. Boyce +6 more
doaj +1 more source
Trace-element geochemistry of mantle olivine and application to mantle petrogenesis and geothermobarometry [PDF]
Chemical Geology, 2010 Abstract Trace-element compositions of olivine from 75 mantle rocks of diverse origin, including xenoliths from kimberlites, basaltic lavas and orogenic peridotites, were determined by laser ablation ICP-MS to study systematic variations between mantle lithologies, partitioning mechanisms in olivine and their potential for geothermobarometry and ...
De Hoog, Cees-Jan +2 more
openaire +2 more sources