Results 101 to 110 of about 830 (208)

Calcium Solubility of Bridgmanite in Subducted Basalt in Earth's Lower Mantle

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract The calcium solubility in bridgmanite and the resulting abundance of davemaoite under lower‐mantle pressure‐temperature conditions have been under debate following a recent report of extensive calcium dissolution in bridgmanite. We experimentally investigated the calcium solubility in bridgmanite in a basaltic composition at pressures up to ...
Chengwei Zhang, Takashi Yoshino, Elias El Ghazaoui, Stella Chariton, Vitali B. Prakapenka, Luo Li, Yanyao Zhang, Jung‐Fu Lin   +7 more
wiley   +1 more source

Electrical Conductivity of Hydrous Ultramafic Melts With Implications for Origin of Low Velocity Layer Atop of the 410 km Seismic Discontinuity

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Low‐velocity layers (LVLs) above the 410‐km discontinuity are commonly attributed to partial melt generated by dehydration melting when hydrous mantle transition‐zone material rises into the upper mantle, where water solubility in nominally anhydrous minerals decreases.
Takashi Yoshino, Longjian Xie
wiley   +1 more source

The Successive Projection Algorithm (SPA), an Algorithm with a Spatial Constraint for the Automatic Search of Endmembers in Hyperspectral Data

Sensors, 2008
Spectral mixing is a problem inherent to remote sensing data and results in fewimage pixel spectra representing "pure" targets. Linear spectral mixture analysis isdesigned to address this problem and it assumes that the pixel-to-pixel variability in ...
D. M. Rogge, Benoit Rivard, Jinkai Zhang
doaj  

Spatial Distribution of Lufeng Dinosaur Valley Outcrops Based on the GF-5 Hyperspectral OS–SPA–SVM Model

Journal of Spectroscopy
This study presents a novel approach to identifying the spatial distribution of geological outcrops using remote sensing, with the Lufeng Dinosaur Valley in China as the focal area. We integrate GF-5 hyperspectral imagery with the automated morphological
Lin Hu, Yu Lu, Shu Gan, Xiping Yuan, Cheng Chen, Zhifu Zhu   +5 more
doaj   +1 more source

Hyperspectral Endmember Extraction Techniques

, 2020
Karbhari V. Kale, Mahesh M. Solankar, Dhananjay B. Nalawade   +2 more
openaire   +2 more sources

Upgradient Storage Features Control Timing and Magnitude of Solute Export at Stream Outlets

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Concentration‐discharge (C‐Q) relations are used to infer water and solute storage and transport but are often informed by coarse‐temporal data. Here, we use high‐frequency and long‐term C‐Q datasets from two adjacent, but geologically and geomorphically distinct, watersheds in Colorado to evaluate how vertical and lateral flowpaths ...
Sara Warix, Keira Johnson, Kenneth Swift Bird, Curtis Beutler, Austin Shirley, Wendy S. Brown, Kenneth H. Williams   +6 more
wiley   +1 more source

Alteration of a Mantle‐Derived Dunite Boulder in Jezero Crater, Mars

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract In 2023, the Mars 2020 Perseverance rover explored the youngest preserved deposits on the Western fan of Jezero crater, Mars: a field of meter‐scale boulders dispersed above the previously explored sandstone and siltstone units. Reflectance spectra of the boulders delineated two classes, one olivine‐bearing and one pyroxene‐bearing.
E. L. Moreland, M. Bramble, K. L. Siebach, A. C. Pascuzzo, M. Morris, S. J. VanBommel, M. Jones, S. Siljeström, A. Srivastava, A. H. Treiman, J. Hurowitz   +10 more
wiley   +1 more source

Crop type discrimination using Geo-Stat Endmember Extraction and machine learning algorithms. [PDF]

Adv Space Res
Singh P, Srivastava PK, Shah D, Pandey MK, Anand A, Prasad R, Dave R, Verrelst J, Bhattacharya BK, Raghubanshi AS.   +9 more
europepmc   +1 more source

Estimating Endmember Backscattering Coefficients Within the Mixed Pixels Based on the Microwave Backscattering Contribution Decomposition Model. [PDF]

Sensors (Basel)
Song Y, Zhang Z, Zheng H, Hou X, Lei J, Gao X, Hellwich O.   +6 more
europepmc   +1 more source

Spatially resolved quantification of wheat kernel vitreousness using hyperspectral imaging and spectral unmixing. [PDF]

Front Plant Sci
Jeong SW, Kim YW, Kim Y, Baek KH, Kang CS, Lee JH, Park YI, Choi MG.   +7 more
europepmc   +1 more source