Results 81 to 90 of about 5,717 (242)

The Paleoproterozoic Nattanen-type granites in northern Finland and vicinity - a postcollisional oxidized A-type suite [PDF]

Bulletin of the Geological Society of Finland, 2009
The ~1.8 Ga Nattanen-type granites in the Finnish Lapland and western Kola Peninsula are found as several relatively small, high-level, discordant plutons that are easily discernible as weak maxima on aeromagnetic maps.
E. Heilimo, J. Halla, L.S. Lauri, O.T. Rämö, H. Huhma, M.I. Kurhila, K. Front   +6 more
doaj   +1 more source

Impact provenance and age of a unique basalt found in Apollo 12 regolith

Meteoritics &Planetary Science, EarlyView.
Abstract Basaltic sample 12032,366‐18 from the Apollo 12 landing site is distinct among basalts collected at this site, other Apollo landing sites, and lunar meteorites in terms of its age, bulk rock composition, and isotopic composition. We present new Pb isotopic data obtained by in situ Secondary Ion Mass Spectrometry on multiple mineral phases in ...
C. Deligny, M. J. Whitehouse, R. E. Merle, H. Jeon, A. A. Nemchin, B. L. Jolliff   +5 more
wiley   +1 more source

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

Torfajökull:a radiogenic end-member of the Iceland Pb-isotopic array [PDF]

, 1999
Torfajökull is the largest silicic center in Iceland and is located on the eastern branch of Iceland's neovolcanic zone. Torfajökull's location on the Iceland volcanic crust is unique because (1) it is situated behind the tip of a propagating ridge, and (
Stecher, Ole, Carlson, Richard W., Gunnarsson, Bjørn   +2 more
core   +1 more source

Asian dust input in the western Philippine Sea: Evidence from radiogenic Sr and Nd isotopes [PDF]

, 2013
The radiogenic strontium (Sr) and neodymium (Nd) isotope compositions of the detrital fraction of surface and subsurface sediments have been determined to trace sediment provenance and contributions from Asian dust off the east coast of Luzon Islands in ...
Jiang, Fuqing, Li, Tiegang, Chen, Tian-Yu, Xu, Zhaokai, Frank, Martin, Li, Anchun   +5 more
core   +1 more source

The Influence of Basaltic Islands on the Oceanic REE Distribution: A Case Study From the Tropical South Pacific

Frontiers in Marine Science, 2018
The Rare Earth Elements (REEs) have been widely used to investigate marine biogeochemical processes as well as the sources and mixing of water masses. However, there are still important uncertainties about the global aqueous REE cycle with respect to the
Mario Molina-Kescher, Ed C. Hathorne, Anne H. Osborne, Melanie K. Behrens, Martin Kölling, Katharina Pahnke, Martin Frank   +6 more
doaj   +1 more source

Radiogenic isotope geology [PDF]

Modern isotope geochemistry is a rapidly expanding field that has a part to play in a broad range of earth and planetary sciences - from extra-solar system processes to environmental geoscience.
Dickin, Alan P.
core  

Application of radiogenic isotopes in Geosciences: Overview and perspectives [PDF]

, 2014
Wider use of radiogenic isotopes in geosciences has been enabled by developments in mass spectrometry at the beginning of the 21st century. Nowadays, radiogenic isotope geochemistry forms an integrated part of geosciences in a range of applications ...
Belousova, E. A., Steven Denyszyn, Svetlana Tessalina, Allen Kennedy, Touboul, M., Anne Trinquier, Nunes, L., Puchtel, I.S., Fred Jourdan, Elena Belousova, Denyszyn, S., Jourdan, Fred, Kennedy, A., Boyet, Maud, Puchtel, I., Trinquier, A., Creaser, R., Belousova, E., Robert Creaser, Tessalina, S.G., Maud Boyet, Igor Puchtel, Jourdan, F., Mathieu Touboul, Tessalina, Svetlana, Boyet, M., Laurie Nunes   +26 more
core   +1 more source

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

Thorium determination in seawater by inductively coupled plasma mass spectrometry: Method development and oceanographic applications

Talanta Open
Thorium isotopes in the ocean (including radiogenic isotopes and terrigenous-derived 232Th) serve as key tracers for studying land-derived material transport. While high-sensitivity and high-resolution inductively coupled plasma mass spectrometry (ICP-MS)
Yingjie Zou, Peng Wang, Lei Xu, Hong Ren, Yiyao Cao   +4 more
doaj   +1 more source