Results 121 to 130 of about 14,112 (239)
The Importance of Sample‐to‐Sensor Distance in Quantitative Micro(Paleo‐)Magnetic Analysis
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract Information on the past of Earth's magnetic field can be retrieved from magnetic grains in rock samples. Micromagnetic Tomography (MMT) is a recently developed method that uses magnetic surface scans from a Quantum Diamond Microscope (QDM) combined with the position of magnetic grains in rock samples to calculate the magnetic moments of those ...
Rosa A. de Boer +4 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar +6 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract The India–Asia collision continuously loads the Tibetan Plateau (TP), driving its Cenozoic eastward growth. This process has caused extensive crustal deformation and a diverse magmatic response. Here, we report on newly identified 35−6.5 Ma granitoids from Kangding area in southeastern (SE) TP.
Quan Ou +8 more
wiley +1 more source
Petrography of Two Iowa Loess Materials
, 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 +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract The middle Cretaceous granitoid plutons of the Shalair Valley, situated in northeastern Iraq, constitute a principal magmatic component of the Sanandaj–Sirjan Zone within the northwestern segment of the Zagros Orogenic Belt. Among these plutons, the equigranular Aulan body (AG) and the porphyritic Laladar body (LG) were crystallized at 111.0 ±
Imad Kadhim Abdulzahra +3 more
wiley +1 more source
, 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
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Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.Abstract The closure of the Paleo‐Tethys Ocean was one of the most important global geological events which formed the framework of the East Asian continent during the early Mesozoic. The Longmu Co‐Shuanghu suture zone is considered to record closure of the main basin of the Paleo‐Tethys Ocean.
Jinyong Li +6 more
wiley +1 more source
Microscope Slides of Detrital Minerals to illustrate „SEDIMENTARY PETROGRAPHY.“
MICROSCOPE SLIDES OF DETRITAL MINERALS TO ILLUSTRATE „SEDIMENTARY PETROGRAPHY.“ Microscope Slides of Detrital Minerals to illustrate „SEDIMENTARY PETROGRAPHY.“ ( -
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Long‐Term Deformation in the Alpine‐Provence Foreland Constrained by In Situ Calcite U‐Pb Dating
Tectonics, Volume 45, Issue 6, June 2026.Abstract The evolution of the Alpine‐Provence foreland is characterized by multiple deformation phases since the Mesozoic, representing successive compressional and extensional episodes. The precise timing and spatial evolution of these deformation phases remain poorly constrained due to the lack of absolute geochronological data. Here, we present U–Pb
Dorian Bienveignant +12 more
wiley +1 more source
, 2002 This site is the home page for the petrography and petrology class at Brock University. The site presents general information about igneous petrology, nomenclature and classification information, modal and normative analysis, and the chemistry of igneous
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