Results 51 to 60 of about 5,261 (211)

Crustal Structure Across the Okavango Rift, Botswana: The SEISORZ Wide‐Angle Seismic Experiment

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract The Okavango Rift Zone (ORZ) is an incipient continental rift in Botswana at the terminus of the Southwestern Branch of the East African Rift System. The lack of syn‐rift magmatism and tectonic processes overprinting pre‐rift structures provide an opportunity to investigate incipient‐stage rift processes and the role of pre‐existing structures
J. Pablo Canales, Lucky Moffat, Kebabonye Laletsang, Daniel Lizarralde, Steven Harder, Galen Kaip, Estella A. Atekwana, Motsoptse P. Modisi   +7 more
wiley   +1 more source

Quantifying Water Diffusivity and Metamorphic Reaction Rates Within Mountain Belts, and Their Implications for the Rheology of Cratons

Geochemistry, Geophysics, Geosystems, 2021
The distribution of rheologically strong cratons, and their weakening by metamorphic hydration reactions, is of fundamental importance for understanding first‐order strength contrasts within the crust and the resulting controls on the tectonic evolution ...
A. J. Whyte, O. M. Weller, A. C. Copley, M. R. St‐Onge   +3 more
doaj   +1 more source

East Meets West: The Trace of the Mesoproterozoic Kibaran Event in the Mantle Lithosphere Beneath Eastern Tanzania

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract We present elemental geochemistry and multiple isotopic systematics (Re‐Os, Lu‐Hf, Sm‐Nd and Sr) for mantle peridotite xenoliths from Lashaine in northern Tanzania. We use the data to examine how the major Proterozoic tectono‐thermal events that affected the crust of the western Tanzanian craton are imprinted on the lithospheric mantle in the ...
Sheng‐Hua Zhou, Qiao Shu, Sally A. Gibson, Hong‐Fu Zhang, Jing‐Jing Zhu, Hélène Legros, D. Graham Pearson   +6 more
wiley   +1 more source

Dating the Sedimentary Protolith of the Daldyn Group Quartzite, Anabar Shield, Russia: New Detrital Zircon Constraints

Geosciences, 2020
Quartzites and paragneisses of the Archean granulite series of the Anabar Shield (Siberian Craton, Russia) are described geochemically. The Sm-Nd isotope systematics of the rocks and the U-Pb age (SHRIMP II) and geochemistry of zircons from quartzites ...
Nikolay I. Gusev, Lyudmila Yu. Sergeeva, Sergey G. Skublov   +2 more
doaj   +1 more source

Rifting Evolution of the Central Campos Basin as a Hybrid Rifted Margin: Insights From Tectonic and Magmatic Structures

Tectonics, Volume 45, Issue 1, January 2026.
Abstract Recent observations and drilling campaigns have challenged the typical models for rifted margins by providing evidence for the existence of intermediate cases between the magmatic and amagmatic end‐members. In this contribution, we document the evolution of the Central Campos rifted margin, located in southeast Brazil, based on a combined ...
P. Alvarez, N. Stanton, G. Peron‐Pinvidic, L. Magnavita   +3 more
wiley   +1 more source

Re-Os age of molybdenite from the Hannivka deposit, Kryvyi Rih structure, Ukrainian Shield

Мінеральні ресурси України
This article presents the results of isotopic dating of molybdenite using the Re–Os method to determine the age of mineralization at the Hannivka deposit.
Yu. Ye. Khomych, V. V. Sukach, L. V. Shumlyanskyy, S. M. Bondarenko, V. O. Syomka, S. Tessalina, M. M. Reshetnyk   +6 more
doaj   +1 more source

The Neoproterozoic Throssell Range Group, Western Australia: A Peri‐Marginal Continental Basin in Rodinia and Its Implications for the Centralian Superbasin

Basin Research, Volume 38, Issue 1, January–February 2026.
This study of recent exploration drillcore reveals two sequences separated by a disconformity. Basal alluvial fan to shallow marine lithofacies suggest reactivation of basement faults, and a distinct upwelling signature points to a flooded margin, controlled by differential subsidence of diverse Proterozoic lithosphere.
Ross B. Campbell, Peir K. Pufahl, Penelope Sinclair, Erin L. Martin, Lillian H. Cybulski, Urmidola Raye, Paul Polito, Rebecca Church, Marina Joury, Daniel Layton‐Matthews   +9 more
wiley   +1 more source

Sources and possible causes of Paleoproterozoic magmatism in the southern part of the Karelian Craton (Baltic Shield)

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018
There is an opinion that Paleoproterozoic magmatism in the Karelian craton of the Baltic Shield is linked solely with the influence of mantle plumes.
Наталья Ивановна Кондрашова, Natalia Kondrashova   +1 more
doaj   +1 more source

From Rainforests to Open‐Vegetation: The Biogeographic History of Chamaecrista (Leguminosae) in the Neotropics

Journal of Biogeography, Volume 53, Issue 1, January 2026.
ABSTRACT Aim We reconstructed the biogeographical history of a species‐rich legume genus by testing alternative hypotheses on the origin and expansion of neotropical open‐vegetation areas, with particular emphasis on the campos rupestres. Location Neotropics.
Juliana Gastaldello Rando, Eduardo Koerich Nery, Anselmo Nogueira, Matheus Martins Teixeira Cota, Alexandre Zuntini, Suzana Alcantara, Gwilym Peter Lewis, Domingos Cardoso, Luciano Paganucci de Queiroz, José Rubens Pirani   +9 more
wiley   +1 more source

A Rare Glimpse of Paleoproterozoic Sub‐Arc Mantle: The Ussuit Peridotite, West Greenland

Geochemistry, Geophysics, Geosystems
Mantle residues beneath Archean cratonic nuclei have been extensively studied, whereas less attention has been given to the mantle lithosphere beneath Proterozoic mobile belts that link these nuclei.
T. McIntyre, P. Waterton, L. Li, B. Gong, X. Zha, K. Szilas, D. G. Pearson   +6 more
doaj   +1 more source