Results 71 to 80 of about 4,118 (239)

Characterization of coesite‐bearing impact melt glass from the Hapcheon crater, Korea: Trimodal phase architecture, shock metamorphism, and implications for 40Ar/39Ar geochronology

Meteoritics &Planetary Science, EarlyView.
Abstract We present the first micrometer‐scale, phase‐resolved compositional characterization of impact melt glass from the Hapcheon crater (~1.4 km apparent diameter), the first confirmed impact structure on the Korean Peninsula, integrating EPMA‐WDS (5 μm spot), confocal Raman spectroscopy (<1 μm spot), XRD, and 40Ar/39Ar step‐heating geochronology ...
Jin‐Young Lee, Jeongmin Kim, Sei‐Sun Hong   +2 more
wiley   +1 more source

Radioactive and radiogenic isotopes in sediments from Cooper Creek, Western Arnhem Land [PDF]

, 2008
Protection of the environment post-mining is a key objective of rehabilitation, especially where runoff and erosion from rehabilitated mine sites could potentially lead to contamination of the surrounding land and watercourses.
Frostick, A., Parry, D., Munksgaard, N., Bollhöfer, A., Evans, K.   +4 more
core   +1 more source

Tracing Continental Basalt Sources and Mantle Processes Using Fe Stable Isotopes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Iron (Fe) isotopes have emerged as powerful tracers of mantle source heterogeneity and melting processes, yet the mechanisms producing heavy Fe isotope signatures (high δ57Fe values) in intraplate basalts remain debated. Competing interpretations include partial melting of recycled pyroxenite domains versus carbonate‐induced oxidation of a ...
Yi‐Shan Cheng, Jian‐Qiang Liu, Li‐Hui Chen, Xun Yu, Gang Zeng, Xiao‐Jun Wang, Zhao‐Yang He, Jian Zhao, Frances M. Deegan, Valentin R. Troll, Hong‐Fu Zhang   +10 more
wiley   +1 more source

Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes [PDF]

, 2019
Highlights • First comprehensive seawater Nd isotope and REE data set for the Barents Sea • Water masses traced with Nd isotopes, salinity and stable oxygen isotopes • No release of particulate REEs to the dissolved load except for cerium •
Bauch, Dorothea, Laukert, Georgi, Petrova, Mariia V., Böning, Philipp, Makhotin, Mikhail, Hathorne, Ed C., Frank, Martin, Kassens, Heidemarie   +7 more
core   +1 more source

Geothermal field of the Grodno region of the Republic of Belarus

Журнал Белорусского государственного университета: География, геология, 2023
The geothermal field of the platform cover within the Grodno region is considered. The cover rests on a crystalline basement of Precambrian rocks. Temperature distribution maps for depths of 100; 200 and 300 m below ground level were compiled based on ...
Владимир Игнатьевич Зуй
doaj  

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

A normalised seawater strontium isotope curve: possible implications for Neoproterozoic-Cambrian weathering rates and the further oxygenation of the Earth [PDF]

, 2007
The strontium isotope composition of seawater is strongly influenced on geological time scales by changes in the rates of continental weathering relative to ocean crust alteration.
Shields, GA, Shields, G. A.
core  

Volcano- and climate-driven changes in atmospheric dust sources and fluxes since the Late Glacial in Central Europe [PDF]

, 2012
Atmospheric dusts are an important part of the global climate system, and play an important role in the marine and terrestrial biogeochemical cycles of major and trace nutrient elements.
LE ROUX Gael, Debaille, Vinciane, KRACHLER Michael, Stille, Peter, van Leeuwen, Jacqueline F. N., Van der Knaap, Willem O., Krachler, Michael, Shotyk, William, DEBAILLE Vinciane, Stille, P., VAN DER KNAAP W. O., Shotyk, W., MATTIELLI Nadine, Le Roux, G., De Vleeschouwer, François, VAN LEEUVEN Jacqueline F. N., Mattielli, Nadine, Krachler, Mickael, Le Roux, Gaël, Van der Knaap, W.O., van Leeuwen, Jacqueline, De Vleeschouwer, F., FAGEL Nathalie, Fagel, Nathalie, Debaille, V., Fagel, N., Krachler, M., van der Knaap, Willem Oscar, DE VLEESCHOUWER Francois, STILLE Peter, SHOTYK W., Van Leeuwen, Jacqueline F.N., Mattielli, N., van der Knaap, Pieter   +33 more
core   +1 more source

A temporal control on the isotopic compositions of the Antarctic Peninsula arc

Communications Earth & Environment
Radiogenic isotopic compositions of arc magmas are a key tool for studying active margin evolution. They have two isotopic end-members: melts formed mostly from juvenile asthenosphere and melts sourced from evolved continental crust/continental ...
Joaquin Bastias-Silva, Alex Burton-Johnson, David Chew, Teal Riley, Wuidad Jara, Massimo Chiaradia   +5 more
doaj   +1 more source

Source‐to‐sink sediment transport reversals during glacial sea‐level lowstands sustain soil formation on pericoastal carbonate terrains

Sedimentology, Volume 73, Issue 5, Page 1892-1910, August 2026.
ABSTRACT Understanding the processes that drive soil formation is crucial for developing sustainable land‐use strategies, as changing land‐use practices and climate change exacerbate soil erosion. The formation of substantial arable soils on carbonate bedrock requires substantial dust accretion as the underlying bedrock lacks siliciclastic material. In
Daniel Palchan, Yael Jacobi Glass, Olga Berlin, Yoav Ben Dor   +3 more
wiley   +1 more source