搜索结果: 1-12 共查到“地球化学 ratios”相关记录12条 . 查询时间(0.014 秒)
Carbon isotope ratios of organic matter in Bering Sea settling particles: Extremely high remineralization of organic carbon derived from diatoms
diatoms coccolithophores carbon isotope organic carbon remineralization rain ratio
2017/4/10
The carbon isotope ratios of organic carbon in settling particles collected in the highly-diatom-productive Bering Sea
were determined. Wet decomposition was employed to oxidize relatively fresh orga...
Origin of unusual fractionation of Pb isotope ratios with calcium in thalliumspiked multiple collector-inductively coupled plasma mass spectrometry
Pb isotope, fractionation, MC-ICPMS
2017/4/10
We report the origin of significant fractionation of Pb isotope ratios in Ca-doped 0.08 mol L–1 HNO3 solutions. We
applied Tl-spiked standard bracketing mass fractionation correction using solution-b...
Microanalysis of Pb isotope ratios of low-Pb glass samples by femtosecond laser ablation-multiple ion counter-ICP-mass spectrometry (fsLA-MIC-ICP-MS)
Pb isotopes laser ablation ICP-MS multiple ion counting (MIC) silicate glass geological reference materials
2017/4/11
We report high-resolution in situ Pb isotope analysis (207Pb/206Pb and 208Pb/206Pb ratios) by femtosecond laser
ablation-multiple ion counter-inductively coupled plasma-mass spectrometry (fsLA-MIC-IC...
Characteristics of hydrogen and oxygen stable isotope ratios in precipitation collected in a snowfall region, Aomori Prefecture, Japan
hydrogen isotope ratio oxygen isotope ratio d-excess seasonal variation Aomori Prefecture
2017/4/10
Characteristics of δ2
H and δ18O in precipitation samples collected at 16- to 17-d intervals at three stations at the
northern end of Honshu Island, Japan, were investigated. Rokkasho and Ajigasawa ...
Spatial distribution of 87Sr/86Sr ratios of stream sediments in Shikoku Island and the Kii Peninsula, Southwest Japan
geochemical map stream sediment
2017/4/11
Geochemical mapping of 87Sr/86Sr ratios in Shikoku Island and the Kii Peninsula of Southwest Japan was performed
using 233 samples of stream sediments (<180 μm). The spatial distribution of 87Sr/86Sr...
Determination of Hf isotope ratios in zircon using multiple collector-inductively coupled plasma mass spectrometry equipped with laser ablation and desolvating nebulizer dual sample introduction system
193 nm excimer Hf isotope laser ablation MC-ICPMS zircon
2017/4/11
We propose an analytical protocol for the accurate in situ determination of 176Hf/177Hf isotope ratios in zircon crystals
by a 193 nm ultraviolet excimer laser ablation (193ExLA) multiple-collector i...
Sr and Nd isotope ratios and trace element concentrations in kimberlites from Shandong and Liaoning (China) and the Kimberley area (South Africa)
kimberlite Jining Wafangdian geochemistry partial melting model
2017/4/11
Strontium-Neodymium isotopes and 28 elements for Kimberlites from China (Shandong and Liaoning) and from South
Africa (Kimberley area) have been measured to estimate their chemical characteristics an...
Error analysis of the determination of carbon stable isotope ratios in lignin and cellulose from plant samples
plants carbon isotope ratio lignin
2017/4/12
To determine the accuracy and precision limits associated with carbon stable isotope ratio (δ13C) measurements of
cellulose and lignin from plant samples, experiments were performed using differing e...
Helium isotopic ratios in fluid inclusions from fluorite-rich Mississippi Valley-Type district of Asturias, northern Spain
fluorite noble gases helium isotopes fluid inclusions Asturias, MVT deposits
2017/8/9
Helium isotopes have been measured in fluorite and sulphides from fluorite-rich Mississippi Valley-type (MVT) deposits from Asturias, Spain, in order to assess the involvement of mantle and crust-deri...
Hydrogen isotope ratios of terrigenous n-alkanes in lacustrine surface sediment of the Tibetan Plateau record the precipitation signal
n-alkanes lacustrine sediment terrestrial origin hydrogen isotope ratio precipitation climate
2017/8/10
Hydrogen isotope ratios were measured on terrigenous alkanes (n-C25 to n-C31) extracted from recent lake surface sediments from the climatically and environmentally distinct basins Qiangyong Glacier L...
On the change of 3He/4He ratios in hot spring gases after The Iwate-Miyagi Nairiku Earthquake in 2008
helium isotopes noble gas earthquake epicenter Japan
2017/8/10
The Iwate-Miyagi Nairiku Earthquake in 2008 (M7.2) occurred on June 14th 2008 in the northeastern Japan, Iwate Prefecture. We collected water and gas samples in hot springs from seven localities aroun...
High sensitivity measurements of nitrogen isotopic ratios in coral skeletons from Palau, western Pacific: Temporal resolution and seasonal variation of nitrogen sources
coral skeleton δ15N value δ18O value δ13C value seasonal variation
2017/8/10
By using a step-wise heating method in conjunction with static vacuum mass spectrometry, we have measured at high temporal resolution (one month) the nitrogen isotopic ratio of a coral skeletal sample...