Results 91 to 100 of about 8,887 (226)

Metasomatic/depletion events affecting Cratons and “cratons” [PDF]

ASEG Extended Abstracts, 2019
Tom Wise*,, Stephan Thiel, Rian Dutch, Mark Pawley, Kate Robertson   +4 more
openaire   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Secular Changes in the Occurrence of Subduction During the Archean

Geophysical Research Letters
Subduction processes play a pivotal role in facilitating material exchange between the crust and mantle, contributing to the growth of continents. However, the onset and evolution of subduction remain hotly debated.
Chun‐Tao Liu, Chen‐Yang Ye, J. ZhangZhou   +2 more
doaj   +1 more source

Periodic cometary showers: Real or imaginary? [PDF]

Since the initial reports in 1980, a considerable body of chemical and physical evidence has been accumulated to indicate that a major impact event occurred on earth 65 million years ago.
Garvin, J. B., Goodacre, A. K., Grieve, R. A. F., Sharpton, V. L.   +3 more
core   +1 more source

Differential Craton Destruction Controlled by Fossil Structures in the Central North China Craton

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract Craton evolution plays a fundamental role in stabilizing the continental lithosphere and the long‐term evolution of Earth's surface environment. The Shanxi Rift Zone (SRZ) within the North China Craton marks an ongoing craton destruction. Detailed lithospheric structure is essential to explain craton destruction.
Cong Ji, Cunrui Han, Xinglu Wang, Götz Bokelmann, Zhouchuan Huang   +4 more
wiley   +1 more source

Origin of nanosized diamonds in interstellar space and low-pressure-temperature Earth rocks [PDF]

, 2009
Nanosized diamond particles in the interstellar space and in the Earth rocks related with water presence. In the paper proposed the model of the nanosized diamond particle formation from oxidized water-carbon dioxide gaseous ...
Sergei Simakov
core   +1 more source

A Curie Point Depth Model of the Conterminous United States Derived From a Prior‐Constrained Equivalent Source Inversion

Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.
Abstract The Curie Point Depth (CPD) is a key thermal boundary in the deep lithosphere and is widely used to constrain its thermal structure. However, uncertainties in magnetization and the non‐uniqueness of inversion lead to considerable inter‐study differences.
Chuanjie Chen, Zhengtao Wang, Yu Gao, Ziyi Zhu   +3 more
wiley   +1 more source

Geological map of Brazil - 2025 (scale 1:5,000,000): Methodology and main geological compartments

Journal of the Geological Survey of Brazil
The Geological Map of Brazil at the 1:5,000,000 scale was recently updated by the Geological Survey of Brazil (SGB-CPRM), in view of the availability of several geological maps and datasets released after the previous version, published in 2001. In this
Vladimir Medeiros, Frank Santos , Marcos Quadros, Elias Espírito Santo , Marcio Silva, Gustavo Moreira, Tiago Barros   +6 more
doaj   +1 more source

Tectonic evolution of the Western Australian Shield [PDF]

Geological and geochronological studies in the Western Australian Shield were updated. This terrane bears many similarities to the Indian Shield since they were neighboring parts of Gondwanaland.
Myers, John S.
core   +1 more source

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, Volume 61, Issue 3, Page 566-592, March 2026.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source