Results 41 to 50 of about 12,547 (243)

Plume-subduction interaction forms large auriferous provinces

Nature Communications, 2017
The lithospheric controls on giant gold deposits remain unclear. Here, the authors show evidence for native gold in the mantle from the Deseado Massif in Patagonia demonstrating that refertilisation of the lithospheric mantle is key in forming ...
Santiago Tassara, José M. González-Jiménez, Martin Reich, Manuel E. Schilling, Diego Morata, Graham Begg, Edward Saunders, William L. Griffin, Suzanne Y. O’Reilly, Michel Grégoire, Fernando Barra, Alexandre Corgne   +11 more
doaj   +1 more source

Coupled Evolution of Plate Tectonics and Basal Mantle Structure

Geochemistry, Geophysics, Geosystems, 2021
The relationships between plate motions and basal mantle structure remain poorly understood, with some models implying that the basal mantle structure has remained stable over time, while others suggest that it could be shaped by the aggregation and ...
Xianzhi Cao, Nicolas Flament, R. Dietmar Müller   +2 more
doaj   +1 more source

MATE: An Analysis Tool for the Interpretation of Magnetotelluric Models of the Mantle

Geochemistry, Geophysics, Geosystems, 2020
Interpretation of electrical conductivity anomalies observed in magnetotelluric models provides an important opportunity to understand the nature of the lithospheric mantle and its dynamics.
Sinan Özaydın, Kate Selway
doaj   +1 more source

Numerical modeling of post-collisional carbonated alkaline magmatism: Variscan style Orogeny (the Ivrea Zone as natural laboratory)

Solid Earth Sciences, 2020
The Ivrea Zone of northwest Italy exposes a section of the lower crust and lithospheric mantle deformed during the Variscan Orogeny, where a series of carbonated alkaline pipes was emplaced over a time span of ca.
Christopher M. Gonzalez, Marco L. Fiorentini, Weronika Gorczyk, Greg Dering   +3 more
doaj   +1 more source

MINERAL COMPOSITION AND PT PARAMETERS OF CRYSTALLIZATION OF MANTLE ROCKS UNDER KIMBERLITE FIELDS OF THE ANABAR REGION

Геодинамика и тектонофизика, 2022
The composition of barophilic minerals from mantle xenoliths and Cpx from concentrates of the Kuranakh, Luchakan, Dyuken, and Ary-Mastakh fields of the Anabar region has been studied.
S. I. Kostrovitsky, T. V. Kalashnikova, I. V. Ashchepkov   +2 more
doaj   +1 more source

Surface Consistent Seismic Hazard Assessment in the Shillong Plateau, Northeast India: A Probabilistic Approach Using Multiple Source Models and a Logic Tree Framework

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT We perform probabilistic seismic hazard analysis (PSHA) in the Shillong Plateau by clubbing the up‐to‐date earthquake data and seismotectonic properties of the study area. Twenty‐one areal seismic sources are delineated based on the updated earthquake catalog, tectonic, and fault plane solutions.
Mohd Shahabuddin, William Kumar Mohanty, Eleftheria Papadimitriou   +2 more
wiley   +1 more source

Enriched lithospheric mantle storage of the Earth's missing niobium: New insights from alkaline rocks with superchondritic Nb/Ta ratios

Geosystems and Geoenvironment
Accessible silicate reservoirs on Earth (i.e., the depleted mantle and continental crust) are depleted in Nb relative to chondrites, as expressed by their subchondritic Nb/Ta ratios.
Yan Yang, Franz Neubauer, Zheng Liu, Guo-Chang Wang, Shu-Cheng Tan, Xiao-Hu He, Chen-Yue Liang   +6 more
doaj   +1 more source

Multiphase Tectonic Process With Slab Dynamics in the Northern East China Sea Shelf Basin

Geological Journal, EarlyView.
Megasequence 1 characterised by Palaeocene extension and differential subsidence driven by the rollback of the subducting Izanagi Plate. Megasequence 2 records a kinematic reorganisation of the East Asian margin, transition from a rifting to a compressional regime.
Juhwan Woo, Won‐Ki Kim, Chul Woo Rhee, Seungyeol Lee   +3 more
wiley   +1 more source

Trace element and Sr-Nd-Pb isotope geochemistry of Rungwe Volcanic Province, Tanzania: Implications for a superplume source for East Africa Rift magmatism

Frontiers in Earth Science, 2014
The recently discovered high, plume-like 3He/4He ratios at Rungwe Volcanic Province (RVP) in southern Tanzania, similar to those at the Main Ethiopian Rift in Ethiopia, strongly suggest that magmatism associated with continental rifting along the entire ...
Paterno R Castillo, David R Hilton, Sæmundur A Halldórsson, Sæmundur A Halldórsson   +3 more
doaj   +1 more source

Brittle Structural Control and Fluid Progress of the Jinqingding Gold Deposit: Implications for Epizonal Gold Mineralization

Acta Geologica Sinica - English Edition, EarlyView.
High‐grade orebodies are controlled by stress field with σ1 oriented NE‐SW during the main mineralization stage.Inferred NEE‐trending strike‐slip fault control another orebody distribution. ABSTRACT The Jinqingding gold deposit in eastern Jiaodong is a significant gold mineralization within the Muping–Rushan metallogenic belt.
Xiaohu Wang, Yuke Shen, Changshan Wei, Fengbin Han, Tao Guo, Huisheng Wang, Jiantao Yu, Yubo Song, Bo Wang, Longji Gong, Guijie Li   +10 more
wiley   +1 more source