Results 51 to 60 of about 549,859 (138)

Petrology, Geochemistry and Tectonomagmatic Setting of Farmahin Volcanic Rocks (North of Arak)

Journal of Economic Geology, 2018
Introduction The study area includes Alam Baghi, Vashaghan, Sar Band and Ghermez Cheshmeh and is located in the northeast of Farmahin and the southwest of Tafresh.
Reza Zarei Sahamieh
doaj   +1 more source

An investigation of crustal contamination through petrology and geochemisty [PDF]

, 2012
The contamination of mantle-derived magmas by the continental crust is an important process during petrogenesis of volcanic rocks at active continental margins e.g. The Andes. Investigating the evolution of continental arc magmas is, however, hampered by
MCLEOD, CLAIRE,LOUISE, McLeod, Claire Louise   +1 more
core   +3 more sources

Role of crustal assimilation in the evolution of andesitic and dacitic magmas from Makran volcanic arc with special reference to Pb isotopes [PDF]

پترولوژی
Introduction The Makran volcanic arc in southern Iran is one of the few active ocean-continent subduction systems in the Alp-Himalaya orogen (Priestley et al., 2021). It includes four volcanic fields: Shahsavaran (SVF), Bazman (BVF), west of Khash (KVF),
Zahra Firouzkouhi, Ali Ahmadi
doaj   +1 more source

Anomalously Low 3He/4He and Elevated Heat Flow in the Northern Apennines Explained by Lithospheric Delamination: A Modeling Approach

Geochemistry, Geophysics, Geosystems
The 3He/4He ratios measured in 12 CO2‐dominated gas seeps from the Tuscany‐Roman Volcanic Provinces in Italy range between 0.07 and ∼1.6 Ra. Helium and δ13CO2 isotope systematics indicate a dominant crustal source with a variable but significantly lower ...
Jean de la Paix Izerumugaba, Anne Battani, Frédéric Mouthereau, Anthony Ranchou‐Peyruse   +3 more
doaj   +1 more source

Mineral chemistry of the bimodal acid and basic dike swarms in the central part of the Dom Feliciano Belt, southern Brazil [PDF]

Anais da Academia Brasileira de Ciências
Basic acid dike swarms of Piratini and Pinheiro Machado areas in the Dom Feliciano belt are intrusive in the Pelotas Batholith. They were emplaced in a shallower crustal level than the batholith. U-Pb age of 560 Ma was obtained for them.
CELI ZANON, RÔMULO MACHADO, RUY PAULO PHILIPP, UMBERTO G. CORDANI   +3 more
doaj   +1 more source

Heavy Metal Contamination of Surface Sediments-Soil Adjoining the Largest Copper Mine Waste Dump in Central India Using Multivariate Pattern Recognition Techniques and Geo-Statistical Mapping [PDF]

Nature Environment and Pollution Technology
This detailed study assessed heavy metal contamination of sediments/soil near central India’s largest copper mining area using 38 sampling sites within 10 km of the mine using atomic absorption spectroscopy.
Anoop Kant Shukla, Manoj Pradhan and Onkar Nath Tiwari
doaj   +1 more source

Concentration and Ecological Risk Assessments of Potentially Toxic Elements in Soils around Lapite Dump Site, Akinyele Local Government Area, Ibadan, Nigeria

Journal of Applied Sciences and Environmental Management
The contamination and ecological risk posed by Potentially Toxic Elements (PTEs) on soils around Lapite dumpsite and its environs were assessed using different analytical techniques after complete digestion of the soil using mixed acids.
M. O. Smart, B. O. Okumodi, D. E. Ibiyeye, A. E. Roberts, O. O. Olunloyo, A. S. Adeoye, O. H. Ibironke   +6 more
doaj   +1 more source

Geochemistry and geochronology of the Palaeozoic mafic magmatism in the Codosera, Almadén and Guadalmez synclines, Central Iberian Zone, Spain

BSGF - Earth Sciences Bulletin
The Central Iberian Zone (CIZ) hosts several mafic suites showing variable geochemical affinities and signatures evolving through time. To provide a better understanding of magmatic processes, possible sources and the temporal evolution of the mafic ...
Campos-Rodríguez Héctor R., Gloaguen Eric, Tuduri Johann, Pochon Anthony, Iacono-Marziano Giada, Poujol Marc, Higueras Pablo, Virtanen Ville J., Sizaret Stanislas, Lorenzo Saturnino, Esbri José-María, Mollé Valentin   +11 more
doaj   +1 more source

Environmental contamination : a selection of papers presented at the 5th International Conference on Environmental Contamination, Morges, Switzerland, 29 September-1 October 1992 /

, 1993
This book deals with various aspects of environmental contamination. One of the fields considered in this work is atmospheric pollution. This has become a major problem of our time, and could soon develop into a scandal through the overestimation of the ...
Vernet, J.-P.(Jean-Pierre), International Conference on Environmental Contamination(5th :1992 :Morges, Switzerland)   +1 more
core  

Geochemical features and petrogenesis of Gökçeada volcanism, Çanakkale, NW Turkey

Bulletin of the Mineral Research and Exploration, 2020
Pınar ŞEN, Ramazan SARI, Erdal ŞEN, Cahit DÖNMEZ, Serkan ÖZKÜMÜŞ, Şahset KÜÇÜKEFE   +5 more
doaj   +1 more source