Results 1 to 10 of about 155,621 (344)

Constraining the rise of oxygen with oxygen isotopes [PDF]

Nature Communications, 2019
The loss of anomalous sulfur isotope compositions from sedimentary rocks has been considered a symptom of permanent atmospheric oxygenation. Here the authors show sulfur and oxygen isotope evidence from 
B. A. Killingsworth, P. Sansjofre, P. Philippot, P. Cartigny, C. Thomazo, S. V. Lalonde   +5 more
doaj   +5 more sources

Fragmentation of exotic oxygen isotopes [PDF]

Brazilian Journal of Physics, 2003
Abrasion-ablation models and the empirical EPAX parametrization of projectile fragmentation are described. Their cross section predictions are compared to recent data of the fragmentation of secondary beams of neutron-rich, unstable 19,20,21O isotopes at
Aumann, Thomas, Boretzky, K, Canto, LF, Carlson, BV, Cortina, D, Data-Pramanik, U, Elze, TW, Emling, Hans, Geissel, Hans, Grunschloss, A, Helariutta, K, Hellström, M., Hussein, MS, Ilievski, S, Jones, K, Khiem, L, Kratz, JV, Kulessa, R, Leistenschneider, A, Lubkiewicz, E, Münzenberg, G., Palit, R, Reiter, P, Scheidenberger, Christoph, Schmidt, KH, Simon, H, Sümmerer, K., Wajda, E, Walus, W   +28 more
core   +8 more sources

Quenching of spectroscopic factors for proton removal in oxygen isotopes [PDF]

, 2011
We present microscopic coupled-cluster calculations of the spectroscopic factors for proton removal from the closed-shell oxygen isotopes $^{14,16,22,24,28}$O with the chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order.
Brown, B. Alex, Gade, A., Hagen, G., Hjorth-Jensen, M., Jensen, Ø.   +4 more
core   +2 more sources

Evolution of ancient hydrothermal fluids theoretically inverted with initial oxygen isotopes of water [PDF]

Scientific Reports
While great successes have been achieved during past decades, oxygen isotopic endmembers of water were implicitly adopted by previous studies for quantifying fossil hydrothermal systems worldwide.
Chun-Sheng Wei, Zi-Fu Zhao
doaj   +2 more sources

Triple Oxygen Isotope Paleoaltimetry of Crystalline Rocks

Frontiers in Earth Science, 2021
Triple oxygen isotopes of hydrothermally altered minerals from crystalline rocks can be used to determine past elevations of mountain ranges. This method uses all three isotopes of oxygen (16O, 17O, and 18O) to create arrays that can be extrapolated back
C. Page Chamberlain, Daniel E. Ibarra, Daniel E. Ibarra, Daniel E. Ibarra, Tyler Kukla, Katharina A. Methner, Yuan Gao   +6 more
doaj   +1 more source

Constraints on carbonate diagenetic fluid properties by microzone in situ analysis of carbon and oxygen isotopes: a case study of Cambrian-Ordovician, Tarim Basin

Shiyou shiyan dizhi, 2023
As an important technological measure to uncover complex sedimentary-diagenetic process, microzone in situ geochemical analysis has drawn more and more attention along with improving analytical and test levels.
Jun HAN, Donghua YOU, Yixiong QIAN, Shaofeng DONG, Shoutao PENG   +4 more
doaj   +1 more source

Evaluation of oxygen isotopes and trace elements in planktonic foraminifera from the Mediterranean Sea as recorders of seawater oxygen isotopes and salinity [PDF]

Climate of the Past, 2020
The Mediterranean Sea is characterized by a relatively strong west to east salinity gradient, which makes it an area suitable for testing the effect of salinity on foraminiferal shell geochemistry.
L. K. Dämmer, L. de Nooijer, E. van Sebille, J. G. Haak, G.-J. Reichart, G.-J. Reichart   +5 more
doaj   +1 more source

A dataset of the mid-brunhes period at site MD05-2925, Solomon Sea: Surface-subsurface planktonic foraminifera stable C-O isotope and Mg/Ca ratios

Data in Brief, 2021
Here we present derived thermal-hydrological variations data during the Marine isotope stages (MISs) 10–12 using surface and subsurface dwelling planktonic foraminiferal geochemical proxies of a sedimentary core of MD05-2925 (9.3oS, 151.5oE, water depth ...
Li Lo, Tzu-Ling Chang, Yu-Chu Su, Chih-Kai Chuang, Chuan-Chou Shen, Horng-Sheng Mii   +5 more
doaj   +1 more source

Investigating stable oxygen and carbon isotopic variability in speleothem records over the last millennium using multiple isotope-enabled climate models [PDF]

Climate of the Past, 2022
The incorporation of water isotopologues into the hydrology of general circulation models (GCMs) facilitates the comparison between modeled and measured proxy data in paleoclimate archives.
J. C. Bühler, J. Axelsson, F. A. Lechleitner, J. Fohlmeister, J. Fohlmeister, A. N. LeGrande, M. Midhun, M. Midhun, J. Sjolte, M. Werner, K. Yoshimura, K. Rehfeld, K. Rehfeld   +12 more
doaj   +1 more source

Isotopic Tracing of Perchlorate Sources in the Environment

Journal of Chemistry, 2021
Perchlorate (ClO4−) is an emerging persistent pollutant that is ubiquitous in the environment at trace concentrations. Perchlorate ingestion poses a risk to human health because it interferes with thyroidal hormone production.
Mengnan Zhang, Xiaoqian Li, Xuxue Cheng, Xinfeng Wang, Mian Song, Xiaoyan Wang, Xuemei Ma   +6 more
doaj   +1 more source