Results 1 to 10 of about 51,712 (271)

A high throughput Rb-Sr dating method using solution tandem ICP-MS/MS (87Sr/86Sr) and standard addition calibration ICP-MS (Rb/Sr) [PDF]

MethodsX, 2021
Routine generation of large Rb-Sr age datasets has been limited by the time-consuming requirement of chromatographic isolation of Sr from Rb to avoid the isobaric interference of 87Rb+ on 87Sr+. Recently, direct measurement of interference-free 87Sr/86Sr
Christiaan T. Laureijs, Laurence A. Coogan, Jody Spence   +2 more
doaj   +2 more sources

Efficient removal of Sr²⁺, V⁵⁺, and Rb⁺ ions from groundwater using a hybrid Mg-MCM-41/Talc composite; Siwa Oasis in Egypt as case study [PDF]

Scientific Reports
This study presents the development and application of a hybrid inorganic adsorbent composed of mesoporous Mg-MCM-41 integrated with exfoliated talc nanosheets (MCM/talc composite)—for the efficient removal of Sr²⁺, V⁵⁺, and Rb⁺ ions from contaminated ...
Hussein A. ELsayed, Mohamed Hamdy Eid, Umer Farooq, Ahmad Al-Qawasmeh, Abdehamid Albiad, Fahad Abdulaziz, Ahmed Mehaney, Péter Szűcs, Mostafa R. Abukhadra   +8 more
doaj   +2 more sources

Ab initio study of the reactivity of ultracold RbSr + RbSr collisions

New Journal of Physics, 2022
We performed ab initio calculations in order to assess the reactivity of ultracold RbSr $({}^{2}{\Sigma}^{+})$ + RbSr $({}^{2}{\Sigma}^{+})$ collisions occurring on the singlet as well as the triplet potential.
Marijn P Man, Tijs Karman, Gerrit C Groenenboom   +2 more
doaj   +1 more source

Mass fractionation of Rb and Sr isotopes during laser ablation-multicollector-ICPMS: in situ observation and correction

Journal of Analytical Science and Technology, 2021
Background One of the most critical issues concerning in situ mass spectrometry lies in accounting for elements and molecules that overlap target isotopes of analytical interest in a sample. This study traced the instrumental mass fractionation of Rb and
Sung-Gyun Yim, Min-Ji Jung, Youn-Joong Jeong, Yeongmin Kim, Albert Chang-sik Cheong   +4 more
doaj   +1 more source

Elemental and K-Ar Isotopic Signatures of Glauconite/Celadonite Pellets from a Metallic Deposit of Missouri: Genetic Implications for the Local Deposits

Geosciences, 2022
In the course of attempting to date the host rocks of Viburnum metal deposits from the US state of Missouri, the purpose was here a detailed examination and contribution of the constitutive minerals of glauconite-rich pellets to the isotopic dating of ...
Norbert Clauer, I. Tonguç Uysal, Amélie Aubert   +2 more
doaj   +1 more source

Microscale Petrographic, Trace Element, and Isotopic Constraints on Glauconite Diagenesis in Altered Sedimentary Sequences: Implications for Glauconite Geochronology

Geochemistry, Geophysics, Geosystems, 2023
Glauconite is an authigenic clay mineral that is common in marine sedimentary successions. Dating of glauconite to determine the depositional age of sedimentary sequences has a long history but has fallen into disfavor due to the difficulty of obtaining “
M. Rafiei, S. C. Lӧhr, O. Alard, A. Baldermann, J. Farkaš, G. A. Brock   +5 more
doaj   +1 more source

Preparation of the Reference Materials for Rb-Sr and Sm-Nd Isotope Analysis

Yankuang ceshi, 2021
BACKGROUND: One Rb-Sr certified reference materials (GBW04411) and one Sm-Nd certified reference materials (GBW04419) for geological age, which are potash feldspar and basalt respectively, were produced and certified about 30 years ago.
TANG Suo-han, LI Jin, PAN Chen-xu, LIU Hui, YAN Bin   +4 more
doaj   +1 more source

Geochemistry of the Precambrian Basement of the Bamenda massif of southeastern Nigeria: petrogenesis and tectonic setting

Geologica Acta, 2020
Trace and Rare-Earth element geochemical study of twenty samples of migmatitic banded gneisses, garnet biotite schists, dolerites, granites and rhyolites was carried out in a bid to determine their petrogenetic and tectonic significance in the evolution ...
C.U. Ibe
doaj   +3 more sources

Design, development and performance evaluation of tractor-drawn raised-bed pulse-planter for precision sowing of pigeonpea (Cajanus cajan)

The Indian Journal of Agricultural Sciences, 2020
In order to promote pulse productivity in India, our government has given prime emphasis on farm mechanization in pulse farming so as to enhance their acreage and productivity under pulses. In this direction, IARI-New Delhi has developed a tractor-drawn
RAJEEV KUMAR, PRAMOD KUMAR SAHOO, ANIL K CHOUDHARY, INDRAMANI INDRAMANI   +3 more
doaj   +1 more source

Geochemical Criteria for Discriminating Shallow and Deep Environments in Oligocene-Miocene Succession, Western Iraq

Iraqi Geological Journal, 2022
The geochemical study of the Oligocene-Miocene succession Anah, Euphrates, and Fatha formations, western Iraq, was carried out to discriminate their depositional environments.
Farah Turki, Salih Awadh
doaj   +1 more source