Results 111 to 120 of about 28,608 (299)
Schist Belts of the Benin‐Nigeria Shield Reveal a Neoproterozoic History
Terra Nova, EarlyView.ABSTRACT Belts of metasedimentary rocks (schist belts) in the Benin‐Nigeria Shield (BNS) are investigated for the first time using U–Pb dating and Lu‐Hf isotope analysis of detrital zircons. We report maximum depositional ages that place their deposition firmly in the Neoproterozoic and link them with strata in the Dahomey Belt, the central African ...
Axel Hofmann +6 more
wiley +1 more source
Rifting and Mafic Magmatism in the Hebridean Basins [PDF]
, 2015 Acknowledgements and Funding Research in the BPIP was supported by NERC grant GR9/1581, and the Carnegie Trust for the Universities of Scotland. H. Rollinson and E.
Hole, M. J. +3 more
core +1 more source
Drainage Divide Migration in Response to Asymmetric Uplift at Eastern Qinling, China
Terra Nova, EarlyView.ABSTRACT Drainage divide migration shapes landscape, sediment patterns, and biodiversity, which is affected by a variety of factors. While geomorphic index and numerical simulations have been employed to investigate divide migration, previous studies ignore the present‐day vertical velocity field.
Wei Li, Junjie Zou, Shao Liu, Hao Zhang
wiley +1 more source
Optical Mineralogy in a Modern Earth Sciences Curriculum [PDF]
, 2007 Provides pedagogical insight concerning the skill of studying minerals The resource being annotated is: http://www.dlese.org/dds/catalog_SERC-NAGT-000-000-000-651 ...
Lamont-Doherty Earth Observatory, Columbia University
core
Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina [PDF]
, 2018 The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal ...
Grosse, Pablo +3 more
core +2 more sources
Analysing Temporal Variations in Radon Concentrations: Identifying Trends and Changes
Terra Nova, EarlyView.ABSTRACT Radon is a well‐known precursor for geodynamic events such as earthquakes and volcanic tremors. Radon concentration variations in soil gas have been monitored worldwide, and extreme radon values have been identified as radon anomalies associated with geodynamic events.
Mutlu İçhedef +3 more
wiley +1 more source
Journal of Economic Geology, 2019 Introduction The formation of the Zagros orogenic belt is attributed to northeastward oblique subduction of the Neotethys beneath the western border of central Iran.
Alireza Zarasvandi +4 more
doaj +1 more source
Terra Nova, EarlyView.ABSTRACT Mylonites and pseudotachylytes play a crucial role in defining the rheology of extending continental crust. In this context, determining the age of brittle‐ductile deformation is fundamental to understanding the rifting evolution stages. Here, we investigate the Premosello Shear Zone, an extensional structure of the Ivrea‐Verbano lower crust ...
Stefania Corvò +3 more
wiley +1 more source
Geologica Acta, 2016 We present new field, petrographical, mineralogical and geochemical data from late Neoproterozoic pegmatites and aplites in southern Sinai, Egypt, at the northernmost limit of the Arabian-Nubian Shield.
K.M. ABDELFADIL +3 more
doaj
Journal of Economic Geology, 2019 Introduction All of the major tectonic zones of Iran, except for the Kopet-Dagh, contain Pan-African crystalline basement. Subduction of the Proto-Tethys at about 630 Ma caused Cadomian arc– and backarc magmatism in the northern margin of Gondwana ...
Forough Malek Mahmoudi +3 more
doaj +1 more source