Results 41 to 50 of about 741 (232)

Geochemistry and tectonomagmatic setting of protolite rocks of meta-volcanics in the Halab metamorphic complex (SW Dandy, Zanjan Province)

open access: yesJournal of Economic Geology, 2019
Introduction Three fundamental goals will be followed in the study of metamorphic terrains including: 1- study of fabric in metamorphic rocks in order to recognize the relationship between metamorphism and deformation, 2- the identification of ...
Rahimeh Nafisi   +3 more
doaj   +1 more source

Repeated Pleistocene Permafrost Episodes in the Western Pannonian Basin

open access: yesPermafrost and Periglacial Processes, EarlyView.
ABSTRACT Concerning the study of past periglacial processes, the Pannonian Basin is a key area as it contains the southernmost frost polygons found in Central Europe. The presence or absence of permafrost is still, however, a matter of debate, and data on the timing of frost action are also scarce.
Krisztina Sebe   +5 more
wiley   +1 more source

Process‐based hydro‐morphometric controls on runoff, erosion, and groundwater recharge in an ungauged tropical crystalline river basin: The Dayi River, Ghana

open access: yesRiver, EarlyView.
Abstract This study quantifies and interprets the hydro‐morphometric characteristics of the Dayi River Basin to evaluate process‐based controls on runoff generation, erosion susceptibility, and groundwater recharge in an ungauged tropical crystalline river system in Ghana.
Bismark Mensah‐Brako
wiley   +1 more source

Controlling factors of coal petrology, coal quality, and coal type characteristics and classification of genesis types of special coal in Ningxia

open access: yesMeitan kexue jishu
Promoting the transition of coal resources from fuel to both fuel and raw material, and achieving clean and efficient utilization of coal are crucial approaches to addressing energy, resource, and environmental challenges in the 21st century.
Yingchun WEI   +7 more
doaj   +1 more source

Variations in the P‐T‐t of Deformation in a Crustal‐Scale Shear Zone in Metagranite

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Deformation in crustal‐scale shear zones occurs over a range of pressure‐temperature‐time (P‐T‐t) conditions, both because they may be vertically extensive structures that simultaneously affect material from the lower crust to the surface, and because ...
T. K. Cawood, J. P. Platt
doaj   +1 more source

Experimental metamorphic petrology

open access: yesReviews of Geophysics, 1979
Since Bowen and Tuttle's pioneering study of the system MgO‐SiO2‐H2O in 1949, advances in experimental metamorphic petrology have occurred steadily rather than in “leaps and bounds”. The number and quality of papers published during the past quadrennium, 1975–1978, attests to the health of the science.
openaire   +3 more sources

The Hidden Harvest: Harnessing Colorado's Geodiversity and Environmental Heterogeneity for Sustainable Agritourism

open access: yesSustainable Development, EarlyView.
ABSTRACT Colorado's geologic, pedologic, topographic, hydrological, and climatic contrasts create strong but under‐synthesized opportunities for sustainable agritourism. This review investigates how geodiversity, and the broader environmental heterogeneity within which it operates, can be used to diversify farm income, strengthen place‐based visitor ...
Bonface O. Manono
wiley   +1 more source

Metamorphic Inheritance, Lower‐Crustal Earthquakes, and Continental Rifting

open access: yesGeochemistry, Geophysics, Geosystems
The Malawi Rift is localized within Precambrian amphibolite‐granulite facies metamorphic belts, bounded by up to 150 km long border faults, and generates earthquakes throughout ∼40 km thick crust.
Å. Fagereng   +3 more
doaj   +1 more source

Modelling Patterns of Past Inundation Processes Combining Geoarchaeology and Morphometric Hydrological Analysis in the Shashe‐Limpopo Basin, South Africa

open access: yesArchaeometry, EarlyView.
ABSTRACT Riverine and valley systems across the globe have been central to the development of past urban centres. By AD 900, the Shashe and Limpopo Rivers seem to have facilitated the interaction and integration of early farming communities in southern Africa. This paper focuses on the application of geoarchaeological perspectives made available by the
B. S. Nxumalo
wiley   +1 more source

Block‐in‐Matrix Deformation and Veining in Alpine Subducted Oceanic Metasediments at Blueschist Facies Conditions

open access: yesGeochemistry, Geophysics, Geosystems
In subduction zones, the locked seismogenic zone is bordered by an upper and a lower transition zone. In these transition zones, deformation is primarily accommodated by an interplay of diffuse viscous deformation within a weak matrix and brittle ...
L. Casoli, A. Petroccia, F. Giuntoli
doaj   +1 more source

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