Results 21 to 30 of about 13,098 (230)

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

open access: yes, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +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]

open access: yesClimate 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   +5 more
doaj   +1 more source

Estimation of Surface and Groundwater Interaction by Stable Isotopic Techniques – A Case Study of Chengalpattu District, OMR Region [PDF]

open access: yesNature Environment and Pollution Technology
Isotopes are atoms of an element having the same atomic number but different mass numbers. Isotopes in hydrology and water resources are used for identifying its occurrence, movement, residence times, recharge, and discharge process.
Surendar Natarajan
doaj   +1 more source

The Guianese paradox: How can the freshwater outflow from the Amazon increase the salinity of the Guianan shore? [PDF]

open access: yes, 2007
French Guiana is notable for the extent of its rain forests, which occupy 97% of the country, and the influence of the Amazon along its shores. In fact, the shores and estuaries support a mangrove forest typical of saline conditions.
Muller, Etienne   +2 more
core   +1 more source

Environmental controls on the stable isotopic composition of Mercenaria mercenaria: Potential application to paleoenvironmental studies [PDF]

open access: yes, 2003
We have investigated the environmental controls of seasonally resolved records of oxygen and carbon isotopes of modern Mercenaria mercenaria bivalves collected live from five coastal sites along the east coast of North America.
Linsley, B. K.   +3 more
core   +1 more source

Hydrochemical Property and Hydrogen and Oxygen Isotopes in the Bayin River Basin

open access: yesGuan'gai paishui xuebao, 2022
【Objective】 The Bayin river basin is located in Qinghai province; the physical and chemical properties of its water vary with many factors. In this paper, we analyze the hydro-chemical properties and hydrogen and oxygen isotopes in different reaches of ...
ZHAI Jingya, JIN Yanxiang, JIN Xin
doaj   +1 more source

Hydrogen in Nominally Anhydrous Crustal Minerals [PDF]

open access: yes, 2003
Systematic infrared and nuclear magnetic resonance investigations of common crustal minerals were undertaken to better understand the geologic significance of minor components of structural hydrous species within these nominally anhydrous minerals ...
Johnson, Elizabeth Ann
core   +1 more source

Water isotopic and hydrochemical characteristics and causality in Tajikistan

open access: yesShui kexue jinzhan, 2013
Main ions and hydrogen,oxygen isotopes were measured in samples of lake water,river water and spring water,which were collected from various locations of the Tajikistan region during the period from September through October 2011.The spatially ...
CENG Haiao, WU Jinglu
doaj   +1 more source

Paradoxically lowered oxygen isotopes of hydrothermally altered minerals by an evolved magmatic water

open access: yesScientific Reports, 2022
It has been well known that the influxing meteoric water can hydrothermally lower oxygen and hydrogen isotopes of rocks and/or minerals during continental magmatic or metamorphic processes in certain appropriate cases.
Chun-Sheng Wei, Zi-Fu Zhao
doaj   +1 more source

Use of hydrogen and oxygen isotopes to understand evaporation from enclosed waterbodies

open access: yesJournal of Environmental Engineering and Landscape Management, 2022
Getting information on evaporation is important for water resource protection and managing regional enclosed waterbodies. Some lake water samples were collected in May and June from a representative enclosed waterbody – the Pearl Lake, Suzhou, China ...
Xinyi Qiu   +4 more
doaj   +1 more source

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