Oxygen isotopes (δ18O)
Tracing fluids during medium to ultra high pressure metamorphism: insights by combined in situ oxygen isotopes and trace element analysis
... While oxygen signatures are efficiently homogenised at the WR scale, even if the mineral data show a convergence in Sr/Pb in different samples, the convergence in Sr/Pb is not observed in the WR (Figure 4 - ...and ...
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What drives interannual variation in tree ring oxygen isotopes in the Amazon?
... between oxygen isotopes ( δ 18 O) and environmental variables have often been the basis for paleoclimate reconstructions, but relying on empirical correlations alone without an understanding of the ...
10
Proterozoic onset of crustal reworking and collisional tectonics : reappraisal of the zircon oxygen isotope record
... Zircon is physically and chemically stable across a wide range of conditions. Its abundance in felsic and intermediate igneous rocks and re- fractory nature in sedimentary rocks make it a key mineral to understand the ...
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Stable Oxygen and Deuterium Isotope Techniques to Identify Plant Water Sources
... information on the dynamics of plant utilization of water resources. Based on the Least Significant Difference (LSD) test, no significant value was found in the deuterium and oxygen isotopes in the stem ...
9
Isotopes (13C and 18O) Geochemistry of Lower Triassic Montney Formation, Northeastern British Columbia, Western Canada
... The application of stable isotope geochemistry in the study of sedimentary rocks has increasingly be- come an integral part of sedimentary geology. In particular, isotopic composition of sediments is impor- tant in ...
22
Modeling oxygen isotopes in the Pliocene: Large-scale features over the land and ocean
... HadCM3 has a resolution of 3.75∘ × 2.5 ∘ with 19 vertical levels in the atmosphere and 1.25∘ × 1.25 ∘ with 20 vertical levels in the ocean. It uses the Gregory and Rowntree [1990] convection scheme, a large-scale cloud ...
19
Oxygen isotopes as a tool to quantify reservoir-scale CO2 pore-space saturation
... the oxygen isotope shift observed in the reservoir water during Otway 2Bext was relatively small, the oxygen isotope- based result compares well with independent measures from pulsed neutron logging ...
16
Coupled measurements of δ18O and δD of hydration water and salinity of fluid inclusions in gypsum from the Messinian Yesares Member, Sorbas Basin (SE Spain)
... strontium isotopes, sulfur and oxygen isotopes in sulfate are relatively insensitive to freshwater inputs and are therefore not recording the dilution of seawater by nonma- rine ...tium ...
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Quasifree (p, 2p) Reactions on Oxygen Isotopes: Observation of Isospin Independence of the Reduced Single-Particle Strength
... exotic oxygen isotopes at the R 3 B=LAND setup with incident beam 59 energies in the range of 300 – 450 ...The oxygen isotopic chain offers a large variation of separation 60 energies that allows for ...
8
Oxygen isotopes in tree rings record variation in precipitation δ18O and amount effects in the south of Mexico.
... 600 masl) correlated with nearby coastal rainfall amounts (Zacatecoluca, El Salvador, 170 masl, r = 0.75) and with rainfall amounts at the nearest climate station (Ixtepec, Mexico, 750 km north, 75 masl, r = 0.63) but ...
12
Quasifree (p, 2p) Reactions on Oxygen Isotopes: Observation of Isospin Independence of the Reduced Single-Particle Strength
... Ar beam was accelerated up to 500 MeV=u and directed onto a Be target. The heavy reaction fragments were selected in the fragment separator FRS according to their magnetic rigidity [26] and transported to the ...
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Origin of Dissolve Ions in Groundwaters in the Northern Densu River Basin of Ghana Using Stable Isotopes of 18O and 2H
... Stable isotopes can also provide an independent vari- able which can assist in identifying the mechanism of Salinization. Salinization arising from leaching of salts is not accompanied by changes in stable isotope ...
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Sea Lamprey (Petromyzon marinus) in the Cheboygan River, Michigan, Watershed: Parasitic Feeding Ecology and Origin of Adults
... Historic and recent evidence suggests that a landlocked population of Sea Lamprey (Petromyzon marinus) complete their life cycle in the upper Cheboygan watershed. In this watershed, the fish communities of Burt and ...
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A review of diatom δ18O in palaeoceanography
... composition of the Si-OH layer at the point of isotope analysis will reflect a combination of dehydroxylation and hydroxylation isotope exchanges with sediment pore water, laboratory water used during sample preparation ...
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Assessment of Groundwater Salinity in Aloha Pliocene Aquifer of Marbella (Málaga)
... Abstract In order to study the origin of the salinity and the salinization mechanisms that operate in the Pliocene Aloha Aquifer, hydrochemical and isotopic environmental techniques have been used, due to their known ...
8
Deconvolving eastern Mediterranean planktic foraminiferal δ18O; a focus on sapropels and sea level reconstruction
... The Mediterranean has great potential for reconstructing past climate. Due to the geography of a semi-enclosed basin, climate signals are amplified in Mediterranean sedimentary records, and high sedimentation rates ...
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Isotopic Variations of Oxygen (δ18O) in Benthic Foraminifera under Antiestuarine Conditions in the Colorado River Delta
... ra exhibited two patterns: 1) Winter-Spring, characterized by negative values; and 2) Summer-Fall, in which positive values predominate (Figure 3). The vari- ation range during the yearly cycle was 8.09%, with values ...
20
An analysis of precipitation isotope distributions across Namibia using historical data
... rainfall isotopes is con- fined to the hyper-arid Namib Desert (Fig 2a and 2c) where annual precipitation is variable, 50 – 100 mm in the south, 5 – 18 mm in the Central Namib and < 50 mm in the north ...
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Domestic Water Supply Dynamics Using Stable Isotopes δ18O, δD, and d Excess
... isotopic evidence for evaporation does not in itself provide a warning signal of water resource sensitivity, data collected over time and analyzed in combination with information on regional climate and hydrology could ...
17
Oxygen Isotopes and Volatiles in Martian Meteorite
... measured oxygen isotope ratios through the use of various sample preparation ...rock oxygen isotope ratios that would arise between a series of cogenetic cumulates that vary only in their phase ...
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