Results 31 to 40 of about 549,859 (138)

Mapping and interpretation of satellite magnetic anomalies from POGO data over the Antarctic region

Annals of Geophysics, 1999
A satellite magnetic anomaly map made using the POGO magnetic field data is compared to three maps made using Magsat data. A total of 14 anomalies with magnitudes greater than 3 nT can be identified in all four of the maps poleward of 60°S latitude ...
P. T. Taylor, R. R. B. von Frese, M. E. Purucker   +2 more
doaj   +1 more source

Assessment of metals pollution in sediments and tailings of Klein Aub and Oamites mine sites, Namibia

Environmental Advances, 2020
The environmental challenges posed by huge volumes of tailings and tailings dumps are often overshadowed by the economic benefits of mining. Tailings contain harmful quantities of toxic substances that can potentially pose serious health and ...
Martha Ndeapo Uugwanga, Nnenesi Anna Kgabi   +1 more
doaj   +1 more source

Lithostratigraphy, geology and geochemistry of the volcanic rocks of the Maligât Formation and associated intrusions on Disko and Nuussuaq, Paleocene of West Greenland

Geological Survey of Denmark and Greenland Bulletin, 2018
The Paleocene volcanic rocks in the Nuussuaq Basin on Disko and Nuussuaq comprise the picritic Vaigat Formation (c. 62–61 Ma) and the overlying basaltic Maligât Formation (c. 60 Ma).
Asger Ken Pedersen, Lotte Melchior Larsen, Gunver Krarup Pedersen   +2 more
doaj  

The Petrogenesis and Geochemistry of Tabas Black Land volcanic field: implications for volcanic activity along the Nayband fault, East Iran

Volcanica, 2019
The Tabas Black Land volcanic field (14 Ma) is on the major right lateral Nayband fault, on the Lut Block, Iran. It has a central area of eroded ventd, surrounded by lavas. Lavas are tilted and folded on the east by the Nayband fault.
Esmail Elahpour, François Nauret, Etienne Medard, Mhammed Benbakkar, Gabrielle Quéinnec, Benjamin van Wyk de Vries   +5 more
doaj   +1 more source

TRACE ELEMENTS AND Sr-Nd ISOTOPES IN AQUA REGIA EXTRACTS TO ASSESS POLLUTION IN URBAN AND FARMLAND SOILS FROM RAVENNA (ITALY)

EQA, 2010
Sr/Ca ratios, and Sr and Nd isotopes, were determined in aqua regia extracts from three urban and agricultural soils from Ravenna. Sr/Ca ratios suggested preferential retention of Sr in the agricultural soils during the weathering of bedrock minerals ...
Francesca Castorina, Umberto Masi, Marco D'Antona, Livia Vittori Antisari, Serena Carbone, Gilmo Vianello   +5 more
doaj   +1 more source

Birth of an ocean in the Red Sea: Initial pangs

Geochemistry, Geophysics, Geosystems, 2012
We obtained areal variations of crustal thickness, magnetic intensity, and degree of melting of the sub‐axial upwelling mantle at Thetis and Nereus Deeps, the two northernmost axial segments of initial oceanic crustal accretion in the Red Sea, where ...
Marco Ligi, Enrico Bonatti, Giovanni Bortoluzzi, Anna Cipriani, Luca Cocchi, Fabio Caratori Tontini, Eugenio Carminati, Luisa Ottolini, Antonio Schettino   +8 more
doaj   +1 more source

Geochemistry and Petrogenesis of Igneous Rocks of the Kutuevsky Au-Cu Porphyry Ore Occurrence (Southern Urals)

Georesursy
The petrological and geochemical features of effusive and intrusive rocks of the Kutuevsky Au-Cu porphyry ore occurrence located in the zone of the Main Ural Fault in the Southern Urals were studied.
S. E. Znamensky
doaj   +1 more source

Mafic-ultramafic magma activity and copper-nickel sulfide metallogeny during Paleozoic in the Eastern Kunlun Orogenic Belt, Qinghai Province, China

China Geology, 2019
: The Eastern Kunlun Orogenic Belt (EKOB) has a complex geological structure and diverse magmatic activities, which are closely related to the Qaidam Basin and the Tethys tectonic evolution.
Zhao-wei Zhang, Ya-lei Wang, Chi-yuan Wang, Bing Qian, Wen-yuan Li, Jiang-wei Zhang, Min-xin You   +6 more
doaj   +1 more source

Contrasting mechanisms for crustal sulphur contamination of mafic magma : evidence from dyke and sill complexes from the British Palaeogene Igneous Province

, 2015
Contrasting mechanisms for crustal sulphur contamination of mafic magma : evidence from dyke and sill complexes from the British Palaeogene Igneous ...
Hannah S. R. Hughes (2843891), Adrian J. Boyce (1297515), David A. Holwell (2843894), Brett Davidheiser-Kroll (2843888), Iain McDonald (2843885), Anthony Aldroyd (7696928), Alison McDonald (54387)   +6 more
core   +3 more sources

Petrography and geochemistry of volcanic rocks in the east of Nabar (SW of Kashan) with emphasis on the role of crustal contamination [PDF]

پترولوژی, 2016
The studied area is located in the east of Nabar village and southwest of Kashan, a part of the Urumieh – Dokhtar magmatic arc. The volcanic rocks belonging to Eocene age, are composed of pyroxene andesites, andesites, dacites and rhyolites. Porphyritic,
Seyed Mohsen Tabatabaei Manesh, Leila Ebrahimi   +1 more
doaj