Results 51 to 60 of about 275,795 (382)
Equilibration in the Aftermath of the Lunar-Forming Giant Impact [PDF]
K. Pahlevan, D. J. Stevenson, Equilibration in the aftermath of
the lunar-forming giant impact. Earth Planet. Sci. Lett. 262, 438 (2007), 2010 Simulations of the moon-forming impact suggest that most of the lunar material derives from the impactor rather than the Earth. Measurements of lunar samples, however, reveal an oxygen isotope composition that is indistinguishable from terrestrial samples, and clearly distinct from meteorites coming from Mars and Vesta.
arxiv +1 more source
Astronomische Nachrichten, EarlyView.ABSTRACT The discovery of radio‐quiet, x‐ray thermally emitting isolated neutron stars (XINSs) in the ROSAT All‐Sky Survey revealed a previously overlooked component of the neutron star population. Advancements in x‐ray instrumentation and the availability of deep, wide‐area optical surveys now enable us to explore XINSs at fainter x‐ray fluxes and ...
Adriana Mancini Pires +11 more
wiley +1 more source
Earth's Future, 2022 The Carbonate rock weathering Carbon Sink (CCS) and Silicate rock weathering Carbon Sink (SCS) play a significant role in the carbon cycle and global climate change.
Lian Xiong +18 more
doaj +1 more source
Efficient Spherical Harmonic Transforms aimed at pseudo-spectral numerical simulations [PDF]
Geochemistry, Geophysics, Geosystems, American Geophysical Union
(AGU), 2013, 14 (3), pp.751-758, 2012 In this paper, we report on very efficient algorithms for the spherical harmonic transform (SHT). Explicitly vectorized variations of the algorithm based on the Gauss-Legendre quadrature are discussed and implemented in the SHTns library which includes scalar and vector transforms.
arxiv +1 more source
Northwest Africa 5790. Top Sequence of the Nakhlite Pile [PDF]
, 2010 NWA 5790 is a recently discovered nakhlite. Its mineralogy, petrology and geochemistry suggest that it is the topmost sequence of the nakhlite lava ...
Badia, D. +7 more
core
Calibration of pressure-dependent sensitivity and discrimination in Nier-type noble gas ion sources [PDF]
, 2000 The efficiency of many noble gas mass spectrometers to ionize gas species is known to be a function of the pressure of gas in the spectrometer. This work shows how the half plate voltage for maximum He or Ar signal depends on the spectrometer pressure ...
Burnard, P. G., Farley, K. A.
core +1 more source
ChemPlusChem, EarlyView.Hungarian mine green, a pigment precipitated from drainage water containing basic copper sulfates and carbonates, represented an important product for painters with the peak of its production in the 16th and 17th centuries in the Banská Bystrica region (Slovakia).
Markéta Žůrková +4 more
wiley +1 more source
The Depositional Record, EarlyView.A new classification for inland freshwater palaeowetlands to be used in the field or core laboratory by sedimentologists, providing examples from the Guadix Basin (southern Spain). Abstract Present wetlands have proven to be delicate, biodiverse ecosystems, that are natural sinks for CO2 and act as good indicators for climate changes.
S. Pla‐Pueyo +1 more
wiley +1 more source
Three-stage Formation of Cap Carbonates after Marinoan Snowball Glaciation Consistent with Depositional Timescales and Geochemistry [PDF]
Nat Commun 15, 7055 (2024)At least two global "Snowball Earth" glaciations occurred during the Neoproterozoic Era (1000-538.8 million years ago). Post-glacial surface environments during this time are recorded in cap carbonates: layers of limestone or dolostone that directly overlie glacial deposits.
arxiv +1 more source
Arsenic geochemistry and health
Environment International, 2005 Arsenic occurs naturally in the earth's crust and is widely distributed in the environment. Natural mineralization and activities of microorganisms enhance arsenic mobilization in the environment but human intervention has exacerbated arsenic contamination. Although arsenic is useful for industrial, agricultural, medicinal and other purposes, it exerts
Emmanuel John M. Carranza +2 more
openaire +5 more sources