The major-ion composition of Cenozoic seawater: The past 36 million years from fluid inclusions in marine halite

2013 ◽  
Vol 313 (8) ◽  
pp. 713-775 ◽  
Author(s):  
S. T. Brennan ◽  
T. K. Lowenstein ◽  
D. I. Cendon
Keyword(s):  
Fluid Inclusions ◽  
Ion Composition ◽  
Major Ion ◽  
The Past

Secular variation in the major-ion chemistry of seawater: Evidence from fluid inclusions in Cretaceous halites

2006 ◽  
Vol 70 (8) ◽  
pp. 1977-1994 ◽  
Author(s):  
Michael N. Timofeeff ◽  
Tim K. Lowenstein ◽  
Maria Augusta Martins da Silva ◽  
Nicholas B. Harris
Keyword(s):  
Fluid Inclusions ◽  
Secular Variation ◽  
Ion Chemistry ◽  
Major Ion Chemistry ◽  
Major Ion

Implantation of ions escaping the atmosphere of Mars within the regolith of Phobos, and Phobos’ surface ion weathering

2020 ◽  
Author(s):  
Quentin Nénon ◽  
Andrew R Poppe ◽  
Ali Rahmati ◽  
James P McFadden
Keyword(s):  
Solar Wind ◽  
Atomic Oxygen ◽  
The Moon ◽  
Ion Composition ◽  
Atmospheric Escape ◽  
The Past ◽  
Lunar Samples ◽  
Singly Charged

<p>Mars has lost and is losing its atmosphere into space. Strong evidences of this come from the observation of planetary singly charged heavy ions (atomic oxygen, molecular oxygen, carbon dioxide ions) by Mars Express and MAVEN. Phobos, the closest moon of Mars, orbits only 6,000 kilometers above the red planet’s surface and is therefore a unique vantage point of the planetary atmospheric escape, with the escaping ions being implanted within the regolith of Phobos and altering the properties of the moon’s surface.</p> <p>In this presentation, we aggregate all ion observations gathered in-situ close to the orbit of Phobos by three ion instruments onboard MAVEN, from 2015 to 2019, to constrain the long-term averaged ion environment seen by the Martian moon at all longitudes along its orbit. In particular, the SupraThermal and Thermal Ion Composition (STATIC) instrument onboard MAVEN distinguishes between solar wind and planetary ions. The newly constrained long-term ion environment seen by Phobos is combined with numerical simulations of ion transport and effects in matter.</p> <p>This way, we find that planetary ions are implanted on the near side of Phobos (pointing towards Mars) inside the uppermost tens of nanometers of regolith grains. The composition of near-side grains that may be sampled by future Phobos sample return missions is therefore not only contaminated by planetary ions, as seen in lunar samples with the terrestrial atmosphere, but may show a unique record of the past atmosphere of Mars.</p> <p>The long-term fluxes of planetary ions precipitating onto Phobos are so intense that these ions weather the moon’s surface as much as or more than solar wind ions. In particular, Martian ions accelerate the long-term sputtering and amorphization of the near side regolith by a factor of 2. Another implication is that ion weathering is highly asymmetric between the near side and far side of Phobos.</p>

Major ion composition of wet and dry deposition in the eastern Mediterranean basin

1995 ◽  
Vol 164 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Idrees F. Al-Momani ◽  
Semra Tuncel ◽  
Ünal Eler ◽  
Erdal Örtel ◽  
Gürol Sirin ◽  
...  
Keyword(s):  
Dry Deposition ◽  
Mediterranean Basin ◽  
Eastern Mediterranean ◽  
Ion Composition ◽  
Wet And Dry Deposition ◽  
Major Ion ◽  
Eastern Mediterranean Basin

Role of sedimentation in regulating major ion composition in a softwater, seepage lake in Northern Wisconsin

1988 ◽  
Vol 23 (1) ◽  
pp. 346-350
Author(s):  
Lawrence A. Baker ◽  
Janice E. Tacconi ◽  
Patrick L. Brezonik
Keyword(s):  
Ion Composition ◽  
Major Ion ◽  
Seepage Lake

scholarly journals Advantages of a fast-scanning quadrupole for LA-ICP-MS analysis of fluid inclusions

2021 ◽  
Author(s):  
Oscar LAURENT ◽  
Marcel Guillong ◽  
Christoph A. Heinrich ◽  
Kenneth Neubauer ◽  
Chady Stephan
Keyword(s):  
Fluid Inclusions ◽  
Geological Samples ◽  
The Past ◽  
Element Concentrations ◽  
Ms Analysis ◽  
Icp Ms

For the past 20 years, LA-ICP-MS has been the method of choice to quantify element concentrations in fluid inclusions hosted in geological samples. However, the ablation of fluid inclusions typically...

Geochemical processes affecting the major ion composition of rivers in the South Island, New Zealand

1999 ◽  
Vol 50 (7) ◽  
pp. 699 ◽  
Author(s):  
Jonathan P. Kim ◽  
Keith A. Hunter ◽  
Malcolm R. Reid
Keyword(s):  
New Zealand ◽  
River Water ◽  
Major Ions ◽  
Geochemical Processes ◽  
Ion Composition ◽  
The South ◽  
Atmospheric Input ◽  
Geochemical Model ◽  
River Waters ◽  
Major Ion

The major ion (Na+ , K+ , Mg2+ , Ca2+ , Cl− , SO42− and reactive SiO2 ) compositions of seven rivers in the South Island, New Zealand (Manuherikia, Clutha, Takaka–Cobb, Haast, Grey, Aorere and Rakaia rivers) are reported. All the rivers were pristine in comparison with global average river waters, and the concentrations of most major ions were close to the 1% percentile levels for global river water compositions. A geochemical model that attributes ion compositions to both rain input and to the weathering of various simple mineral types in the catchment was applied to these data, and to data already published. This model, although simplistic, accounts for the main features of major ion composition in the rivers studied. The dominant sources of major ions were the weathering of limestones and feldspars. Atmospheric input was relatively small except for Na+ and Cl− .

Sign in / Sign up

Export Citation Format

Share Document