Results 71 to 80 of about 299,133 (214)

U-Pb zircon age of Ordovician magmatism in the Albera Massif (Eastern Pyrenees)

Geologica Acta, 2011
New geochronological data from the Albera Massif confirm the presence of an Early – Mid Ordovician igneous event (472 - 465Ma) recorded in the pre-Variscan rocks of the Pyrenees.
M. LIESA TORRE-MARÍN, J. CARRERAS, P. CASTIÑEIRAS GARCÍA, J.M. CASAS, M. NAVIDAD, M. VILÀ   +5 more
doaj  

Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
The Holocene Tiwai Spit on Foveaux Strait is a 12 km by 2 km gravel‐dominated strand plain, ∼10 m above present sea level. Gravel clasts are dominated by well‐rounded quartz cobbles, pebbles and granules derived from Otago Schist 200 km to the north in evolving river drainage systems during late Cenozoic.
Marshall Palmer, Dave Craw
wiley   +1 more source

Chemical and isotopic compositions of Archean magmatic and metasedimentary rocks and minerals from the Podolia domain, Ukrainian Shield

, 2013
Zircons from the oldest magmatic and metasedimentary rocks in the Podolia domain of the Ukrainian shield were studied and dated by the U-Pb method on a NORDSIM secondary-ion mass spectrometer.
L M Stepanyuk (8003609), Fedotova, A A, Shumlyansky, L V, Claesson, S, L S Il'insky (6973127), Kirnozova, Tatyana I, Elena V Bibikova (6973106), Fugzan, Mira M, Stepanyuk, L M, S Claesson (6973109), A A Fedotova (6973112), Bibikova, Elena V, L V Shumlyansky (8003801), Tatyana I Kirnozova (6973121), Il'insky, L S, Mira M Fugzan (6973124)   +15 more
core   +1 more source

Hybridization between I-type and S-type granites in the ordovician famatinian magmatic arc, Tafí del Valle, Tucumán, NW Argentina

Geologica Acta, 2018
In the Tafí del Valle region, in northwestern Argentina, several intrusive bodies of lower Paleozoic age were emplaced in the metasedimentary Puncoviscana Formation, belonging to the Sierras Pampeanas. Four intrusive bodies outcrop in the study area: La
J.P. LÓPEZ, L.I. BELLOS, J. DÍAZ-ALVARADO, A. CASTRO   +3 more
doaj  

Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]

Bulletin of the Geological Society of Finland
In this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola, Matti Kurhila, Hannu Huhma   +2 more
doaj   +1 more source

Geophysical Investigation of a Thermal Field in Abu Dhabi, United Arab Emirates

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract In the Abu Dhabi Emirate, near Madinat Zayed and Liwa, studies have identified high geothermal gradients and high‐heat‐flow areas. Assessing the geothermal potential in this region requires a detailed mapping of subsurface geological formations and their thermal properties.
Hakim Saibi, Mohammed Y. Ali, Ahmed Abdelmaksoud, Biruk Abera Cherkose   +3 more
wiley   +1 more source

Geochronological Constraints on Diachronous Post‐Collisional Slab Breakoff Along the Paleo‐Tethyan Sutures

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract The slab breakoff model is a preferred geodynamic interpretation for post‐collisional exhumation and associated magmatic flare‐ups. In this study, rutile U–Pb dating of retrograde eclogites revealed distinct stages of exhumation along the Paleo‐Tethyan sutures in southwest China. The studied samples yielded ages of 246.7 ± 8.5 and 239.7 ± 14.0 
Min Liu, Hao Wu, Xi‐Jun Liu, Rong‐Guo Hu, Si‐Nan Lv, Xiao‐Xiao Hu, Yao Xiao, Hao‐Dong Wei   +7 more
wiley   +1 more source

The Archean Rio das Velhas greenstone belt revisited: new insights into the stratigraphy

Journal of the Geological Survey of Brazil, 2020
The Neoarchean Rio das Velhas greenstone belt (RVGB), southeast Brazil, contains major tectonic and stratigraphic discontinuities that allow its division into three fault-bound tectonostratigraphic blocks named Santa Bárbara, Nova Lima-Caeté and São ...
Joanna Araújo, Raianny Ferreira, Frederico Freitas, Joana Magalhães   +3 more
doaj   +1 more source

Probing the Elastic Anisotropy of Schistose Rocks West of the Tauern Window (Eastern Alps, Austria): The Largest Homogeneous Volume

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The anatomy of orogens is difficult to decipher as structural information is usually limited to surface and seismic data. Seismic properties are directionally dependent on anisotropic minerals, especially phyllosilicates. Due to tectonic complexity, the effect of anisotropy in seismic data is difficult to determine.
D. Lang, R. Kuehn, R. Kilian, H. Pomella, M. Stipp   +4 more
wiley   +1 more source

Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: Evolution of Neoarchaean supracrustal belts at the northern margin of the North Atlantic Craton, West Greenland [PDF]

Geological Survey of Denmark and Greenland Bulletin, 2006
The Archaean North Atlantic Craton of West Greenland collided at c. 1.9 Ga with a lesser-known Archaean craton to the north, to form the Nagssugtoqidian orogen.
Stensgaard, Bo Møller, Keiding, Marie, Hollis, Julie A, van Gool, Jeroen A.M., Garde, Adam A.   +4 more
doaj