Results 171 to 180 of about 5,404 (212)

Building the Andean Crust at ∼35°S: Arc Geochemistry Reveals Cretaceous Thinning and Rapid Neogene Thickening

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Quantification of the timing and mechanisms of crustal thickening in Cordilleran orogenic hinterlands remains challenging. We address this in the Andes using whole‐rock geochemistry and zircon petrochronology from a >70 Myr volcanic record in the Tinguiririca valley of Chile (∼35° ${}^{\circ}$S), which captures a pivotal transition from ...
Chance B. Ronemus, Caden J. Howlett, Peter G. DeCelles, Barbara Carrapa, Andrés Echaurren, Matías Barrionuevo, Jesse G. Mosolf, Michelle L. Foley, Mihai N. Ducea   +8 more
wiley   +1 more source

Devitrification-driven pore formation in the tight tuff from the Tiaohu formation in the Santanghu Basin, Northwest China. [PDF]

Sci Rep
Bai B, Dai C, Li G, Dong R, Zhu Z, Xiang L, Zhou Y.   +6 more
europepmc   +1 more source

Pore‐Scale Mechanism of Anomalous Saturation Dependence for Induced Polarization: Insights From Desiccation Experiments and Pore‐Network Modeling

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The complex conductivity method, also known as spectral induced polarization (SIP), is widely used in hydrogeophysical investigations. Power‐law functions with positive exponents between the in‐phase/quadrature components of complex conductivity and water saturation are key petrophysical relationships to interpret field data.
Siyuan Qiang, Xiaoqing Shi, André Revil, Alexis Maineult   +3 more
wiley   +1 more source

Porous and Permeable Crystalline Basement: Evidence for Large‐Scale Hydraulic Connectivity at Kivetty, Finland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Porosity and permeability in crystalline shield basement are commonly assumed to be low, yet some fault zones sustain fluid circulation over kilometer scales. Here we quantify multiscale fault‐zone connectivity at Kivetty, central Finland, by integrating legacy deep‐borehole data, including packer tests, downhole logs, and a long‐term multi ...
Daniel Carbajal‐Martínez, Michael J. Heap, Ester M. Jolis, Toni Luoto, Thierry Reuschlé, Satu Vuoriainen, Jukka Kuva, Evgenii Kortunov, Alan Bischoff   +8 more
wiley   +1 more source

Assessment of the feed additive consisting of bentonite (dioctahedral montmorillonite) as an anticaking agent for all animal species and as a substance for reduction of the contamination of feed by mycotoxins for pigs, poultry and ruminants for the renewal of its authorisation (BASF SE). [PDF]

EFSA J
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Villa RE, Azimonti G, Bonos E, Christensen H, Durjava M, Dusemund B, Gehring R, Glandorf B, Kouba M, López-Alonso M, Marcon F, Martelli G, Nebbia C, Pechová A, Prieto-Maradona M, Theodoridou K, Dulak-Lis M, Galobart J, Vettori MV, Holczknecht O, Innocenti ML, Villa AN, Pizzo F, Valeri P.   +24 more
europepmc   +1 more source

Formation and Alteration of Magnesite Nodules From Kunwarara, Queensland, Australia, as an Analog to Mg‐Carbonate Formation on Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli, T. M. Present, P. M. Vasconcelos, L. C. Kah, C. Swindle, S. Bhattacharjee, K. Farley   +6 more
wiley   +1 more source

A high-resolution, multi-method palaeoenvironmental record from pan sediments at Maralaleng Pan, southern Kalahari basin. [PDF]

PLoS One
Faul I, Grandfield T, Green C, Hensel-Karamalakidou EA, Segadika P, Winterhalder R, Mothulatshipi S, Dreibrodt S, Andersen N, Frouin M, Ecker M.   +10 more
europepmc   +1 more source

Visible to Near‐Infrared Properties of Felsic Rocks: Plagioclase Detection Limits and Applications to Mars Orbital Spectra

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Widespread plagioclase detections on Mars using orbital visible to near infrared (VNIR) reflectance spectra have led to multiple interpretations of “feldspathic” terrain, ranging from ancient crustal material and evolved plutons to volcanic lava flows.
Hunter Vannier, Briony H. N. Horgan, Michael Phillips, Michael Eddy, Rebecca Greenberger, Arya Udry   +5 more
wiley   +1 more source

Radiological risk assessment and geochemical signatures of calc-alkaline bostonite dikes. [PDF]

Sci Rep
Gawad AEA, El Rahman RMA, Hanfi MY.
europepmc   +1 more source

The Parguera Fault System: Possible Quaternary Reactivation of Bedrock Faults in Southwest Puerto Rico

Tectonics, Volume 45, Issue 9, September 2026.
Abstract We present evidence of a previously unrecognized east‐west‐trending normal fault, named the Parguera Fault, in southwest Puerto Rico. The fault is located at the northwestern edge of seismicity from the southwest Puerto Rico seismic sequence that began in 2019, near the coastal town of La Parguera.
Jessica Thompson Jobe, Richard Briggs, Victor Ortega Diaz, Emerson M. Lynch, K. Stephen Hughes, Thomas Pratt, Anjana Shah, Francisco Hernandez, Chris M. Justiniano Vélez, Alberto López‐Venegas, Elizabeth Vanacore, M. Morow Tan, Harrison Gray   +12 more
wiley   +1 more source