Results 81 to 90 of about 77,130 (271)

Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle [PDF]

, 2007
Peridotitic xenoliths in basaltic andesites from Batan island in the Luzon arc contain silica-rich (broadly dacitic) hydrous melt inclusions that were likely trapped when these rocks were within the upper mantle wedge underlying the arc.
Eiler, J. M., Kita, N. T., Schiano, P., Stolper, E. M., Valley, J. W.   +4 more
core   +5 more sources

Assessing Pb Isotopic Equilibrium Between Apatite and K‐Feldspar

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Quantifying common Pb, the non‐radiogenic Pb present in a mineral independent of in situ U decay, is essential for obtaining accurate U–Pb ages in common Pb‐bearing minerals such as apatite. However, constraining the amount and composition of common Pb, as well as the timing of its entrapment, remains a persistent challenge.
Priyanjan Datta, Christopher L. Kirkland, Janne Liebmann, Hugo K. H. Olierook   +3 more
wiley   +1 more source

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review [PDF]

, 2004
Mafic alkalic volcanism was widespread in the Carpathian–Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was
Albarede, Aldanmaz, Alexandru Szakács, Balogh, Balogh, Balogh, Balogh, Blusztajn, Campbell, Cebria, Class, Csontos, Csontos, Dobosi, Dobosi, Dobosi, Downes, Downes, Downes, Ebner, Embey-Isztin, Embey-Isztin, Embey-Isztin, Fodor, Granet, Gîrbacea, Harangi, Harangi, Harangi, Harangi, Hilary Downes, Hofmann, Horváth, Höernle, Ioan Seghedi, Jung, Kadosa Balogh, Konečny, Konečny, Mason, Mason, Maţenco, McKenzie, Orlando Vaselli, Pécskay, Pécskay, Rosenbaum, Royden, Royden, Roşu, Salters, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Shaw, Sims, Späth, Späth, Sun, Szabó, Szabó, Szakács, Tatsumi, Thirlwall, Thirlwall, Vaselli, Wedepohl, Wilson, Wilson, Wöerner, Zindler, Zoltán Pécskay, Zou, Šimon   +75 more
core   +1 more source

From Collision to Subduction: Thermal‐Kinematic Inversions Constrain Plate Boundary Structure and Dip‐Slip Activity in Southwestern New Zealand

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract Constraints on three‐dimensional fault system geometry and kinematics are required to understand both long‐term tectonics and contemporary seismic hazard. In many cases, these parameters must be inferred from a combination of different data or analyses.
A. M. Mere, N. C. Barth, D. Seward, D. McPhillips   +3 more
wiley   +1 more source

New Nd-142 Evidence for a Non-Chondritic Composition of the Moon [PDF]

The coupled Sm-147,146-Nd-143,142 systematics of lunar samples has been extensively studied for estimating the timescale of lunar differentiation. The published datasets yield consistent ages for Nd isotopic closure within the lunar mantle of approx.200 ...
Bourdon, B., Kleine, T., Nyquist, L., Shih, C.Y., Touboul, M.   +4 more
core   +1 more source

Rifting and arc-related early Paleozoic volcanism along the North Gondwana margin: geochemical and geological evidence from Sardinia (Italy) [PDF]

, 2012
Three series of volcanic rocks accumulated during the Cambrian to Silurian in the metasediment-dominated Variscan basement of Sardinia. They provide a record of the changing geodynamic setting of the North Gondwana margin between Upper Cambrian and ...
BUZZI L, FUNEDDA A., GAGGERO L, OGGIANO G   +3 more
core   +1 more source

Slab‐Mantle Interaction During Subduction Initiation: Constraints From Trace Element and Sr‐Nd‐Pb Isotope Systematics of Boninite and Other Magmas and Metamorphic Sole in the Oman Ophiolite

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Late Cretaceous Oman ophiolite includes a series of volcanic rocks generated during the transition from spreading ridge to protoarc associated with subduction initiation. We analyzed major and trace elements and Sr, Nd, and Pb isotope compositions of lavas and dikes of the protoarc stage, especially boninites. We also analyzed amphibolites
Tsuyoshi Ishikawa, Kazuya Nagaishi, Kyoko Kanayama, Keitaro Kitamura, Shigeyuki Wakaki, Yuki Kusano, Susumu Umino   +6 more
wiley   +1 more source

Sudbury project (University of Muenster-Ontario Geological Survey): Petrology, chemistry, and origin of breccia formations [PDF]

Within the Sudbury Project of the University of Muenster and the Ontario Geological Survey special emphasis was put on the breccia formations exposed at the Sudbury structure (SS) because of their crucial role for the impact hypothesis.
Avermann, M., Brockmeyer, P., Deutsch, A., Lakomy, R., Mueller-Mohr, V., Stoeffler, D.   +5 more
core   +1 more source

Collisional stripping of planetary crusts [PDF]

, 2017
Geochemical studies of planetary accretion and evolution have invoked various degrees of collisional erosion to explain differences in bulk composition between planets and chondrites.
Carter, Philip J., Elliott, Tim, Leinhardt, Zoë M., Stewart, Sarah T., Walter, Michael J.   +4 more
core   +3 more sources

Spruce Budworm Defoliation Influences Greenhouse Gas Concentrations in Streams

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 2, February 2026.
Abstract One of the most significant natural disturbances in the Canadian boreal and hemiboreal forest is tree defoliation by eastern spruce budworm (SBW), which may increase nutrient and carbon inputs to catchment soils, and in runoff. Closely connected to catchments, headwater streams are known to be significant emitters of greenhouse gases (GHGs ...
Sandrine Ouimet, Erik J. S. Emilson, Michael Stastny, Lisa Galantini, Roxane Maranger   +4 more
wiley   +1 more source