Results 91 to 100 of about 4,118 (239)

Oceanic Anoxic Event 2 triggered by Kerguelen volcanism

Nature Communications
Large Igneous Provinces (LIPs) are associated with global warming and carbon cycle perturbations during Oceanic Anoxic Event 2 (OAE2, ~94 Ma) and the Mid-Cenomanian Event (MCE, ~96.5 Ma).
C. A. Walker-Trivett, S. Kender, K. A. Bogus, K. Littler, T. Edvardsen, M. J. Leng, J. Lacey, J. B. Riding, I. L. Millar, D. Wagner   +9 more
doaj   +1 more source

Magnesium Isotopes as a Tracer of Crustal Materials in Volcanic Arc Magmas in the Northern Cascade Arc

Frontiers in Earth Science, 2018
Fifteen North Cascade Arc basalts and andesites were analyzed for Mg isotopes to investigate the extent and manner of crustal contributions to this magmatic system.
Aaron W. Brewer, Aaron W. Brewer, Fang-Zhen Teng, Emily Mullen   +3 more
doaj   +1 more source

Active Hydrothermal Hydrogen Emissions in Continental Collision Settings: Insights From the Southeastern Tibetan Plateau

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Natural hydrogen (H2) is a promising clean energy resource and a significant component of geothermal gases, yet its origins and release mechanisms remain poorly constrained. Here, we present geochemical and isotopic data (CO2, N2, Ar, H2, He, CH4, 3He/4He, δ13C‐CO2, and δ13C‐CH4) for hydrothermal gases from the Changning–Menglian suture (CMS),
Xuelian Huang, Xiaocheng Zhou, Jiao Tian, Yuwen Wang, Bingyu Yao, Zhaojun Zeng, Shuai Wang, Han Yan, Ruibin Li, Yingling Han, Yuxing Ren   +10 more
wiley   +1 more source

Radiogenic p-isotopes from SN Ia, nuclear physics uncertainties and Galactic chemical evolution compared with values in primitive meteorites [PDF]

, 2014
The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae (SNe Ia) with different metallicities.
Dauphas, N., Röpke, F., Gallino, R., Rauscher, T., Travaglio, C., Röpke, F. K., Hillebrandt, W.   +6 more
core   +1 more source

Continental Crust Rejuvenation Across the Paleo‐Mesoarchean Transition Resulted From Elevated Mantle Geotherms

Geophysical Research Letters
The increase in initial Hf isotopes identified in early Mesoarchean detrital zircon is commonly interpreted as a reflection of the geodynamic transition from stagnant‐lid to mobile‐lid tectonics.
Gui‐Mei Lu, Yi‐Gang Xu, Wei Wang, Christopher J. Spencer, Guangyu Huang, Nick M. W. Roberts   +5 more
doaj   +1 more source

Radioactive and radiogenic isotope research

Eos, Transactions American Geophysical Union, 1971
The number of laboratories and workers in the field of radioactive isotope research has grown rapidly over the past four years. With this growth has come a large increase in the volume of literature on the subject. Consequently the bibliography, given below is meant to include the more significant or more complete investigations.
openaire   +1 more source

High‐Resolution Anisian Marine Perturbation by Volcanism in the Eastern Paleo‐Tethys

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Following the end‐Permian mass extinction, the Middle Triassic Anisian Stage was still characterized by environmental perturbations that hindered biological flourishing, yet it remains uncertain whether these persistent Tethyan disturbances were coupled with the closure of the Paleo‐Tethys Ocean.
Zhenyang Lai, Danxin Li, Yonggang Yan, Qian Zhao, Enxiong Zhou, Yalan Fu, Xiaotai Deng, Thanakan Anchana, Apivut Veeravinantanakul, Punya Charusiri, Weitao Wang, Baochun Huang, Peizhen Zhang   +12 more
wiley   +1 more source

Geology of the Pitchblende Deposits of Port Radium, Great Bear Lake, N.W.T. [PDF]

, 1955
The geology of the McTavish Arm area of Great Bear Lake, Northwest Territories, Canada, is reviewed and a geologic map is presented. The geology of the Labine Point region is described in detail.
Campbell, Douglas Dean
core   +1 more source

Sanukitoid stable isotopes reveal complex crust-mantle dynamics in the early Earth

Communications Earth & Environment
The Archean to Paleoproterozoic Earth underwent significant changes in surface, crust and mantle systems, yet interactions between these reservoirs remain poorly constrained.
Ren-Zhi Zhu, Mike Fowler, Jiyuan Yin, Fang Huang, Robert H. Smithies, Laura M. Spencer, Marc-Alban Millet, Hugo Moreira, Craig Storey, Henrique Bruno, Kumar Batuk Joshi, Xiaoping Long, Shaocong Lai, Guochun Zhao   +13 more
doaj   +1 more source

C and N Isotopic Fractionation Along Permafrost Profiles: A Theoretical Framework and Empirical Tests Across the Arctic

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 7, July 2026.
Abstract Anticipating the decomposition of permafrost organic matter (OM) following thaw is critical for improving projections of climate‐carbon feedbacks. Stable carbon (C) and nitrogen (N) isotope profiles provide integrated records of the environmental and biogeochemical processes that shaped OM during its accumulation and may therefore improve our ...
Lucas Deschamps, Jennifer Paillassa, Esther Lévesque, Vincent Maire   +3 more
wiley   +1 more source