Results 81 to 90 of about 35,501 (220)
Mineralogically based geology and stratigraphy of the Posyet Peninsular (Southern Primorye)
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2019 Authigenic minerals were studied in volcanogenic-sedimentary rocks of the Posyet Peninsular (Southern Primorye). They are sensitive indicators of sedimentation conditions, and indicate changes in the paleogeographic environment and the nature of ...
Можеровский А.В.
doaj +1 more source
Timescales of carbon turnover in soils with mixed crystalline mineralogies
, 2017 Organic matter–mineral associations stabilize much of the carbon (C) stored globally in soils. Metastable short-range-order (SRO) minerals such as allophane and ferrihydrite provide one mechanism for long-term stabilization of organic matter in young ...
Bern, C. +3 more
core +2 more sources
Spitzer IRS Spectroscopy of the 10 Myr-old EF Cha Debris Disk: Evidence for Phyllosilicate-Rich Dust in the Terrestrial Zone [PDF]
, 2011 We describe Spitzer IRS spectroscopic observations of the 10 Myr-old star, EF Cha. Compositional modeling of the spectra from 5 {\mu}m to 35 {\mu}m confirms that it is surrounded by a luminous debris disk with LD/L\star ~ 10-3, containing dust with ...
Currie, Thayne +4 more
core +4 more sources
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.Abstract Molybdenum isotopes (δ98Mo) have been used for more than two decades to investigate past‐ocean redox conditions due to the distinct behavior of this element in oxic and anoxic environments. The oxic sink is generally accepted to have a near‐constant δ98Mo value of −0.7‰, a value derived primarily from the δ98Mo signatures of Fe–Mn crusts and ...
P. L. Fraga‐Ferreira +3 more
wiley +1 more source
The role of biofilms in subsurface transport processes [PDF]
, 2010 Landfill and radioactive waste disposal risk assessments focus on contaminant transport and are principally concerned with understanding the movement of gas, water and solutes through engineered barriers and natural groundwater systems.
Bateman, K. +6 more
core +1 more source
Impact Reactivation of a Hydrothermal System in Basalt in the Vargeão Dome Impact Structure, Brazil
Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.Abstract As hydrous minerals have been observed in impact craters on Mars, impact‐generated hydrothermal systems (IGHSs) have been considered as potential habitats for life on that planet. The Vargeão Dome, a 12 km wide impact structure in southern Brazil, was formed in basalts with at least two hydrothermal alteration stages.
Jitse Alsemgeest +5 more
wiley +1 more source
SİVRİHİSAR KUZEY DOĞUSUNDAKİ (MÜLK-DEMİRCİ) NEOJEN YAŞLI VOLKANİKLERDE KİL MİNERALLEŞMESİ
Bulletin of the Mineral Research and Exploration, 2007 Mülk-Demirci yöresinde (KD Sivrihisar) yer alan Neojen yaşlı gölsel birimler; kırıntılı-evaporitik çökeller ile volkanik ve piroklastiklerden oluşmaktadır.
Zehra KARAKAŞ +2 more
doaj
Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.Abstract The incompatible behavior of Lithium during magmatic differentiation and high mobility during aqueous alteration make it a valuable tracer of crustal processes on Mars. Its preferential incorporation into secondary phyllosilicates further links Li to clay‐forming environments, which are critical for evaluating past aqueous activity and ...
K. W. Nikolajsen +12 more
wiley +1 more source
Automated Ultrafiltration Device for Environmental Nanoparticle Research and Implications: A Review
Micromachines, 2013 Nanoparticle research and development have brought significant breakthroughs in many areas of basic and applied sciences. However, efficiently collecting nanoparticles in large quantities in pure and natural systems is a major challenge in nanoscience ...
Ming K. Wang +4 more
doaj +1 more source
Evaluation of mineralogy per geological layers by Approximate Bayesian Computation
, 2019 We propose a new methodology to perform mineralogic inversion from wellbore logs based on a Bayesian linear regression model. Our method essentially relies on three steps.
Bruned, Vianney +3 more
core +3 more sources