Results 111 to 120 of about 1,244,965 (221)

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 9, Page 665-682, November 2026.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges   +5 more
wiley   +1 more source

Symbiont‐Mediated Molybdenum Cycling Shapes Coral Skeletal Mo Isotopes

open access: yesGeophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Coral skeletal trace‐metal compositions are commonly assumed to derive from seawater, yet the extent to which biological processes contribute remains poorly constrained. Here we present the first paired Mo isotope measurements of coral tissue, symbiotic zooxanthellae, and skeleton.
Xuefei Chen   +7 more
wiley   +1 more source

Nonlinear spectral unmixing of hyperspectral images using Gaussian processes [PDF]

open access: yes, 2012
This paper presents an unsupervised algorithm for nonlinear unmixing of hyperspectral images. The proposed model assumes that the pixel reflectances result from a nonlinear function of the abundance vectors associated with the pure spectral components ...
Altmann, Yoann   +5 more
core   +1 more source

An Improved Dust Emission Modeling With Multiple Endmember Spectral Mixture Analysis

open access: yesGeophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Traditional dust emission schemes typically rely on photosynthetic vegetation (PV) alone when parameterizing key surface properties. Here, we integrate five endmembers from the multiple endmember spectral mixture analysis (MESMA), namely PV, non‐photosynthetic vegetation, bare soil, dark surface, and ice/snow (IS), into a well‐established dust
Qidi Pan   +8 more
wiley   +1 more source

Hyperspectral image unmixing using a multiresolution sticky HDP [PDF]

open access: yes, 2012
This paper is concerned with joint Bayesian endmember extraction and linear unmixing of hyperspectral images using a spatial prior on the abundance vectors.We propose a generative model for hyperspectral images in which the abundances are sampled from a ...
Hero, Alfred O.   +3 more
core   +1 more source

A Generalized Analytical Model for Marine Gas Hydrate Stability Zones With Thermodynamically Constrained Pressure–Temperature Phase Boundary

open access: yesGeophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Accurate thermodynamic delineation of marine gas hydrate stability zones (GHSZs) is a fundamental prerequisite for assessing methane hydrate inventories, quantifying the vulnerability of methane dissociation to climate change, and evaluating overpressure‐induced submarine geohazards.
Haibing Yu, Xin Luo
wiley   +1 more source

Hydropeaking Catalyzes Redox Reactions in Impacted Aquifers: A First Field Evidence

open access: yesGeophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Hydropeaking indicates the sudden and frequent fluctuation of river stage caused by the operation of hydropower plants. This river alteration affects numerous physical, chemical, biological, and ecohydrological processes in surface water bodies.
Gabriele Chiogna   +10 more
wiley   +1 more source

Finding Endmember Classes and Endmembers in Hyperspectral Images

open access: yes, 2016
Remotely sensed images have been used in a broad range of applications ranging from chemical/biological defense, geology, agriculture to environmental protection, law enforcement and intelligence applications.
Gao, Cheng
core   +1 more source

Stochastic Spectral Unmixing with Enhanced Endmember Class Separation

open access: yes, 2004
Improvements to an algorithm for performing spectral unmixing of hyperspectral imagery based on the stochastic mixing model (SMM) are presented. The SMM provides a method for characterizing both subpixel mixing of the pure image constituents, or ...
Hardie, Russell C., Eismann, Michael T.
core   +1 more source

Home - About - Disclaimer - Privacy