Results 71 to 80 of about 1,340 (151)

Soil Carbon–Nitrogen Pools and Soil Health Across Contrasting Land Uses and a No‐Till Conservation Chronosequence in a Tropical Guinea Savanna Agroecosystem

Plant-Environment Interactions, Volume 7, Issue 4, August 2026.
ABSTRACT Soil carbon–nitrogen pools are central to soil health, yet their responses to conservation‐oriented management remain insufficiently quantified in tropical agroecosystems. This study evaluated soil carbon–nitrogen pools, stocks and soil health indicators across conventionally managed arable land (CMA), no‐till‐based conservation systems with 2,
Samuel Ayodele Mesele, Abosede Busayo Babatunde, Joseph Uponi   +2 more
wiley   +1 more source

Occurrence of Prehnite, Pumpellyite and Garnet in Biotite from Granitic Rocks of the Canadian Appalachians: A Mineral Chemistry Study Using Electron Microprobe [PDF]

Journal of Sciences, Islamic Republic of Iran, 2011
A particular feature of biotite grains from some of the Canadian Appalachian granitic rocks is the presence of lenses of Ca-Al silicates developed along cleavage planes. These from the more to less common are prehnite, pumpellyite and grandite garnet, an
A.A. T. Shabani
doaj  

Carbonate‐Associated Sulfate Does Not Record Superheavy δ34S in Deep Scandinavian Bedrock Fractures: Implications for Pyrite Formation in the Deep Biosphere

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract In deep bedrock fractures of the Fennoscandian shield, pyrite with “superheavy” δ34S values of up to 147‰ exists together with calcite. The extreme variability and 34S‐enrichment in pyrite indicate that microbial sulfate reduction (MSR) evolved to almost complete sulfate exhaustion in closed‐system microenvironments.
V. Fichtner, F. Genske, E. Kooijman, H. Drake   +3 more
wiley   +1 more source

Petrogenesis and Tectonic Evolution of Cenozoic Magmatism in the Southernmost Northern Andes: Insights From Zircon Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias, C. Witt, L. C. Sandoval Espinel, M. Zattin, M. Poujol, O. Bruguier, O. Poma, M. J. Hernández, O. Averbuch, M. Seyler, D. Bosch, F. Chanier, S. Ventalon, C. Liorzou, V. Bosse   +14 more
wiley   +1 more source

Oxygen Fugacity Buffers and an Interactive Calculator

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Oxygen fugacity buffers are equilibrium phase assemblages that constrain the chemical potential of oxygen. They may be coexisting minerals or fluids, or their metastable extrapolations. Oxygen fugacity values vary as a function of pressure and temperature, such that raw numbers often have little interpretive value.
Michael Anenburg
wiley   +1 more source

Exhumation History of the Sangre de Cristo Range, Colorado, From Mid‐ to Low‐Temperature Thermochronology: New Insights Into Laramide Contraction and Oligocene–Miocene Extension in the Northern Rio Grande Rift, USA

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The Sangre de Cristo Range in southern Colorado records a complex tectonic history that includes Late Cretaceous–Eocene Laramide contraction and Oligocene–Quaternary Rio Grande rift extension. We present new thermochronologic data (40Ar/39Ar, fission‐track, (U‐Th)/He) and thermal history models that provide insight into this polyphase history ...
John Singleton, Samantha Malavarca, Alexis K. Ault, Omar Ghamedi, M. Cole Sitar, Paul O’Sullivan, Martin Wong, Jonathan Saul Caine, James Metcalf, Dylan Frawley, Jeffrey M. Rahl   +10 more
wiley   +1 more source

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

Terra Nova, EarlyView.
Sérgio P. Neves, Alain Vauchez
wiley   +1 more source

Ceramic Production and Geodiversity in Iron Age Iberia: An Archaeometric Study of Pottery from Castrejón de Capote (SW Spain)

Archaeometry, Volume 68, Issue 4, Page 659-673, August 2026.
ABSTRACT The hillfort of Castrejón de Capote is one of the best investigated settlements of Late Iron Age southwest Iberia. Located in the territory that the classical sources attributed to the Celtici, it was occupied between the early 4th and the 1st centuries bce.
Beatrijs de Groot, Luis Berrocal‐Rangel, Manuel Fernández‐Götz   +2 more
wiley   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, Volume 44, Issue 7, Page 510-536, August 2026.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, Volume 73, Issue 5, Page 1842-1866, August 2026.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source