Results 111 to 120 of about 63,412 (230)

Application of spectral signature study and geochemical analysis in the characterization of Bhavani Mettupalayam Ultramafic Complex in the Southern Granulite Terrane, India

Geosystems and Geoenvironment
The Bhavani Suture Zone, a region in the Southern Granulite Terrane (SGT), is where the Neoarchean Madurai Block and the Southern Madurai Block in western Tamil Nadu have been joined.
M. Monisha, M. Muthukumar, V.J. Rajesh
doaj   +1 more source

Stored mafic/ultramafic crust and early Archean mantle depletion [PDF]

Both early and late Archean rocks from greenstone belts and felsic gneiss complexes exhibit positive epsilon(Nd) values of +1 to +5 by 3.5 Ga, demonstrating that a depleted mantle reservoir existed very early.
Chase, Clement G., Patchett, P. J.
core   +1 more source

Crustal Magma Storage and Plumbing System Beneath the Tianchi and Wangtian'e Volcanoes, Changbaishan Intraplate Volcanic Field, China and North Korea

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract The Changbaishan volcanic field, which includes the Tianchi and Wangtian'e volcanoes in China and the Namphothe volcano in North Korea, is one of the most complex and hazardous volcanic regions on Earth due to its tectonic setting and explosive Holocene activity.
Xiaomeng Niu, Xingli Fan, Xin Wang, Qi‐Fu Chen, Yanru An, Daining Yang, Yunjie Ji, Yuhan Ding, Jianhong Kang, Sheng Guan   +9 more
wiley   +1 more source

Robust Directional Analysis of Magnetic Microscopy Images Using Non‐Linear Inversion and Iterative Euler Deconvolution

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract In paleomagnetism, bulk measurements of entire samples have traditionally been used to characterize remanent magnetization. While effective, this approach provides only a general directional estimate and cannot resolve spatial variability or magnetization at the grain scale.
Gelson F. Souza‐Junior, Leonardo Uieda, Ricardo I. F. Trindade, Roger R. Fu, Ualisson D. Bellon, Yago M. Castro   +5 more
wiley   +1 more source

Reflectance spectra of mafic silicates and phyllosilicates from .6 to 4.6 microns [PDF]

The results of spectral measurements for mafic silicates are given. The study provided valuable spectral reflectance information about mafic silicates and phyllosilicates in the 2.5 to 4.6 micron wavelength region.
Mccord, Thomas B., Roush, Ted L., Singer, Robert B.   +2 more
core   +1 more source

Fault Friction, Plate Rheology, and Mantle Torques From a Global Dynamic Model of Neotectonics

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Improvements in software, parallel computing, global data sets, and laboratory flow‐laws help to develop the global Earth5 thin‐shell finite‐element model of Bird et al. (2008, https://doi.org/10.1029/2007jb005460) into a benchmark study. All experiments confirm that modeled faults (other than megathrusts) have low effective friction of 0.085 ±
Peter Bird, Jon Bryan May, Michele M. C. Carafa   +2 more
wiley   +1 more source

Fractal Dimensions of Venusian Lava Flows: New Findings for Atla Regio and Review of Previous Analyses

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The fractal dimensions of lava flow margins on Earth often correlate with their flow morphologies and have been used to tentatively identify flow morphology on other rocky planets where fine‐scale observations are limited. Previous studies of lava flow margins on Venus have reported fractal dimensions (D) mostly within the range between 1.05 ...
E. M. Recchuiti, V. Haag, D. R. Bohnenstiehl, A. Soldati   +3 more
wiley   +1 more source

Testing the Limits of Provenance Analysis From Basaltic Fluvial Sediment Near Sandvatn, Iceland, as a Mars Analog

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Detrital sediments that accumulate downstream and are preserved in sedimentary rocks can allow characterization of geologic formations that are inaccessible for spatial or temporal reasons. However, mixing, sorting, and alteration of sediment during transport may complicate reconstruction of protolith characteristics.
Audrey R. Putnam, Kirsten L. Siebach, Michael T. Thorpe, Valerie M. Tu, Elizabeth B. Rampe, Candice C. Bedford, Gelu Costin, Joseph J. Tamborski   +7 more
wiley   +1 more source

A tubular protozoan predator: a burrow selectively filled with tubular agglutinated protozoans (Xenophyophorea, Foraminifera) in the abyssal South China Sea [PDF]

, 2004
We report the occurrence of an unusual agglutinated protozoan-filled burrow recovered in a box core collected in 1998 from a depth of 2496 m in the South China Sea.
Kaminski, M.A., Wetzel, A.
core  

The Spectroscopic Impact of Sublimation Under Martian Surface Conditions: Implications for Sample Analysis by the Rosalind Franklin Rover and Biosignature Preservation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The 2028 ESA/NASA Rosalind Franklin Mission (RFM) will search for signs of past and present life in the shallow subsurface of Mars. It is crucial to understand how minerals and any biosignatures uncovered during these sampling activities might change and be identified under today's Martian conditions.
Louisa J. Preston, Charles H. Minns, Ifigeneia Rousouli, Connor J. Ballard, Sadiazannat Mirdha, Lewis R. Dartnell   +5 more
wiley   +1 more source