Results 11 to 20 of about 7,532,149 (298)

Defining the Potential of Nanoscale Re‐Os Isotope Systematics Using Atom Probe Microscopy [PDF]

Geostandards and Geoanalytical Research, 2018
Atom probe microscopy (APM) is a relatively new in situ tool for measuring isotope fractions from nanoscale volumes (< 0.01 μm3). We calculate the theoretical detectable difference of an isotope ratio measurement result from APM using counting statistics of a hypothetical data set to be ± 4δ or 0.4% (2s).
Daly, Luke, Bland, Phil A., Tessalina, Svetlana, Saxey, David W., Reddy, Steven M., Fougerouse, Denis, Rickard, William D.A., Forman, Lucy V., La Fontaine, Alexandre, Cairney, Julie, Ringer, Simon P., Schaefer, Bruce F., Schwander, Daniel   +12 more
core   +6 more sources

Re-Os geochronology and coupled Os-Sr isotope constraints on the Sturtian snowball Earth [PDF]

Proceedings of the National Academy of Sciences, 2013
Significance The causal mechanisms of global glaciations are poorly understood. The transition to a Neoproterozoic Snowball Earth after more than 1 Gy without glaciation represents the most dramatic episode of climate change in the geological record.
Rooney, A., Macdonald, F., Strauss, J., Dudás, F., Hallmann, C., Selby, D.   +5 more
openaire   +9 more sources

Re-Os isotope geochemistry of komatiite-hosted Ni-Cu-PGE deposits in Finland [PDF]

, 2020
We have studied the Re-Os isotope systematics of komatiite-related Ni-Cu-PGE sulfide deposits in Finland, including the Archean Ruossakero Ni-(Cu), Vaara Ni-(Cu-PGE), Tainiovaara Ni-(Cu-PGE) deposits and Ni-PGE sulfide mineralization related to a dunitic
Li, C., Moilanen, M., Törmänen, T., Yang, S.-H., Konnunaho, J., Zhou, L.M., Hanski, E.   +6 more
core   +1 more source

Analytical Methods for Os Isotope Ratios and Re-PGE Mass Fractions in Geological Samples

Frontiers in Chemistry, 2021
The recent advances in analytical methods of Re-Os and PGE in geological materials including sample dissolution, chemical separation, mass spectrometric determinations, as well as the developments of matrix-matched reference materials for data quality ...
Zhuyin Chu, Zhuyin Chu
doaj   +1 more source

Precise Re–Os ages of organic-rich mudrocks and the Os isotope composition of Jurassic seawater [PDF]

, 1999
Rhenium and osmium isotope and abundance data have been obtained on precisely-located samples from three suites of immature, organic-rich mudrocks from Jurassic coastal outcrops in England, The data provide accurate whole-rode ages of 207 +/- 12 Ma, 181 +
Hawkesworth, Chris, Angela L Coe, Bartlett, J M, Anthony S Cohen, Coe, A L, Bartlett, Jessica M., Hawkesworth, Christopher J., Cohen, Anthony S., Coe, Angela L., Jessica M Bartlett, Chris J Hawkesworth, Cohen, A S   +11 more
core   +3 more sources

Mineral separation protocol for accurate and precise rhenium-osmium (Re-Os) geochronology and sulphur isotope composition of individual sulphide species

MethodsX, 2020
A temporal framework for mineral deposits is essential when addressing the history of their formation and conceptualizing genetic models of their origin.
N.J. Saintilan, D. Selby, J.W. Hughes, D. Schlatter, J. Kolb, A. Boyce   +5 more
doaj   +1 more source

The Constraints of Carbonaceous Mudstone Re-Os and Detrital Zircons U-Pb Isotopic Dating on the Diagenetic and Metallogenic Ages from the Dabaoshan Copper Deposit in Guangdong Province

Yankuang ceshi, 2022
BACKGROUND With the development of high-precision negative thermal ionization mass spectrometry (N-TIMS) technology, Re-Os isotopic dating of carbonaceous mudstone is more and more widely used in the determination of sedimentary age. The controversy over
LIU Wusheng, ZHAO Hong, ZHAO Ruyi, QIN Jinhua, ZHANG Xiong, JIANG Jinchang, ZHAO Chenhui, LI Tingjie, WANG Chenghui   +8 more
doaj   +1 more source

Study on the Causes for ICP-MS Signal Intensity Declination of Os Water Absorption Liquid

Yankuang ceshi, 2018
BACKGROUND Os can be separated from the sample matrix by distillation, and the absorbing liquid can be introduced into ICP-MS directly, which is a key step of the molybdenite Re-Os isotopic age analysis.
ZHOU Li-min, LI Chao, LI Xin-wei, ZHAO Hong, QU Wen-jun, DU An-dao   +5 more
doaj   +1 more source

Recent progress on the research of Re–Os geochronology and Re–Os elemental and isotopic systematics in petroleum systems

Journal of Natural Gas Geoscience, 2020
Re–Os geochronometer has been used in the dating of generation-accumulation, thermal cracking, and thermochemical sulfate reduction of crude oil and the oil-source correlation of petroleum systems in recent years. Re and Os concentrations are higher in the asphaltene fraction of crude oil and the earlier precipitated fractions of asphaltene.
Yanming Sai, Keyu Jin, Mingzhuang Luo, Hui Tian, Jie Li, Junjie Liu   +5 more
openaire   +2 more sources

Study on the Re-Os Isotope Composition of Graphite from the Lutang Graphite Deposit in Hunan Province

Yankuang ceshi, 2017
Graphite has relatively high Re and Os contents and is an ideal mineral for Re-Os isotope dating. However, there are few studies on Re-Os dating of graphite.
LI Chao, WANG Deng-hong, ZHOU Li-min, ZHAO Hong, LI Xin-wei, QU Wen-jun   +5 more
doaj   +1 more source