Results 101 to 110 of about 14,109 (220)
Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner +6 more
wiley +1 more source
Petrography of Two Iowa Loess Materials [PDF]
, 1939 A research project, in the Department of Geology at Iowa State College, has as its purpose the investigation of the petrography of Iowa clays and soils.
Cuthbert, F. Leicester +1 more
core +2 more sources
GOLD-POLYMETALLIC MINERALIZATION OF THE RIDDER-SOKOLNOYE DEPOSIT IN THE RUDNY ALTAI (EASTERN KAZAKHSTAN) [PDF]
Минералогия, 2018 New geochemical data on distribution of gold mineralization in the ore lode sections of the Ridder-Sokolnoye deposit, the largest in Rudny Altai, confirm the crossing style of gold-quartz veins and gold-bearing stockwork relative to the zonal bodies of ...
G.D.Ganzhenko +2 more
doaj
TEV—A Program for the Determination of the Thermal Expansion Tensor from Diffraction Data
Crystals, 2015 TEV (Thermal Expansion Visualizing) is a user-friendly program for the calculation of the thermal expansion tensor αij from diffraction data. Unit cell parameters determined from temperature dependent data collections can be provided as input.
Thomas Langreiter, Volker Kahlenberg
doaj +1 more source
Tracing Continental Basalt Sources and Mantle Processes Using Fe Stable Isotopes
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract Iron (Fe) isotopes have emerged as powerful tracers of mantle source heterogeneity and melting processes, yet the mechanisms producing heavy Fe isotope signatures (high δ57Fe values) in intraplate basalts remain debated. Competing interpretations include partial melting of recycled pyroxenite domains versus carbonate‐induced oxidation of a ...
Yi‐Shan Cheng +10 more
wiley +1 more source
Introduction to Petrography [PDF]
, 2002 This Introduction to Petrography homepage from the University of Houston contains a variety of instructional materials. Topics covered include tectonics, the rock cycle, mineralogy, sedimentary, igneous, and metamorphic petrology, classification, phase ...
John Butler
core
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias +14 more
wiley +1 more source
Microscope Slides of Detrital Minerals to illustrate „SEDIMENTARY PETROGRAPHY.“ [PDF]
MICROSCOPE SLIDES OF DETRITAL MINERALS TO ILLUSTRATE „SEDIMENTARY PETROGRAPHY.“ Microscope Slides of Detrital Minerals to illustrate „SEDIMENTARY PETROGRAPHY.“ ( -
core
Automated Mineral Identification and Rock‐Type Classification of Lunar Mare Basalts Using SEM Images
Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.Abstract We present an automated system for identifying minerals and classifying rock types in Apollo lunar mare basalts using scanning electron microscopy (SEM) imagery. Mineral segmentation is based on a U‐Net architecture, supplemented by two scale‐aware models designed to incorporate pixel size information.
Ji‐In Jung +3 more
wiley +1 more source