Results 71 to 80 of about 7,825 (224)

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner, Robert Schöner, Reinhard Gaupp, Andreas Kronz, Benjamin Bomfleur, Joerg W. Schneider, Lothar G. Viereck   +6 more
wiley   +1 more source

Geochemistry, Petrology and Zircon U-Pb Dating for Bibi Maryam Granitoid, NE of Nehbandan, East of Iran

Journal of Economic Geology, 2011
Bibi Maryam granitoid body with about 5 Km2 has intruded into ophiolite mélange complex in sistan suture zone, in east of Iran. Thermal effects of this body on the host rocks show that this activity occurred after emplacement of ophiolite mélange ...
Mohammad Hossein Zarrinkoub, Sun-Lin Chung, Seyyed Saeid Mohammadi, Mohammad Mahdi Khatib   +3 more
doaj   +1 more source

On the Origin of Certain Granitoid Rocks [PDF]

Nature, 1879
DR. CALLAWAY'S interesting letter with the above heading in NATURE (vol. xx. p. 219) tempts me to send you the following paragraph from my paper in the Quart. Journ. Geolog. Soc. for May, p. 286, an which the halleflintas of the Arvonian there mentioned are first described:—
openaire   +2 more sources

Reconnaissance Investigation of Sedimentation Patterns in a Small Modern Anthropogenically Influenced Inlet, Otūwhero Estuary, Abel Tasman National Park, New Zealand

New Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 3, September 2026.
The structurally controlled Otūwhero estuary on the SE boundary of Abel Tasman National Park is a small partially filled incised valley. The small size, limited number of fluvial inputs, accessibility and surrounding land use made it an ideal candidate on which to investigate potential climate‐induced estuarine behaviour. Surficial sediment samples and
Mark J. F. Lawrence, Henry J. L. Gard, Barbara Lyndsell, Salman Ashraf, Steven Rosenberg   +4 more
wiley   +1 more source

The role of crustal and mantle sources in the genesis of granitoids of the Antarctic Peninsula and adjacent crustal blocks [PDF]

, 2001
Magmatic rocks from the Antarctic Peninsula show marked variations in isotope composition, which reflect changes in the geodynamic evolution of the peninsula through time. Most Antarctic Peninsula granitoids formed as a result of subduction: they fall on
Millar, I.L., Willan, R.C.R., Wareham, C.D., Boyce, A.J.   +3 more
core   +3 more sources

Petrology of Pirin granitoids

Geologica Balcanica, 1989
On the basis of spatial relationships, petrological and structural studies, accessory-mineralogical, geochemical and paleogeophysical data, the following groups of plutons are distinguished in Pirin Mountain: Spančevo (of probable Late Proterozoic age), Bezbog (Southbulgarian type, Hercynian age) and young – Central Pirin (Central Pirin and Dautovo ...
openaire   +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

Reconstructing Along‐Strike Variability of Retreating Accretionary Margins Using Detrital Isotopic Proxies in Patagonia and Japan

Tectonics, Volume 45, Issue 9, September 2026.
Abstract Retreating accretionary systems are common features of convergent plate margins. They are characterized by upper plate extension and backarc basin formation, which often forms diachronously and asymmetrically along‐strike. This study tests the hypothesis that this along‐strike variability in backarc basin formation is reflected in detrital and
F. M. Rey, M. A. Malkowski, H. Masago, E. M. Launderville   +3 more
wiley   +1 more source

The inclusion of grothite in the zircon from granitoids of the crystalline basement of the Southern Yamal Peninsula

Vestnik MGTU, 2019
Grothite – rare F-Al-rich type of titanite – has been found in accessory zircon from the granitoids of the pre-Jurassic basement of the Verkhnerechensky oil-gas area (in the southern part of the Yamal Peninsula) as a result of the study.
Erokhin Yu. V., Ivanov K. S. , Khiller V. V.   +2 more
doaj   +1 more source

Petrogenesis and Tectonic Implication of the Newly Identified Rhyacian and Orosirian Orthogneisses in the Northwestern Part of the Gyeonggi Massif (Soyeonpyeongdo and Ganghwado Areas), South Korea: Constrained From Whole‐Rock Geochemistry and Zircon U‐Pb‐Hf Isotopic Compositions

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract The Gyeonggi Massif is one of the major Precambrian basements in the Korean Peninsula where Paleoproterozoic orthogneiss and paragneiss were widely exposed. In this study, newly identified Rhyacian to Orosirian meta‐igneous rocks from the northwestern Gyeonggi Massif (Soyeonpyeongdo and Ganghwado areas) were investigated to elucidate their ...
Seung Hwan Lee, Deung‐Lyong Cho, Jeong‐Yeong Park, Sung Won Kim, Byung Choon Lee, Mingguo Zhai   +5 more
wiley   +1 more source