Results 71 to 80 of about 166,331 (170)

Geology of the Alexander City 7.5’ Quadrangle, Alabama and U-Pb Zircon Dating of the Elkahatchee Quartz Diorite, southernmost Appalachian orogen [PDF]

, 2019
Geological mapping of the Alexander City Quadrangle in the eastern Blue Ridge of the Southern Appalachian orogen in Alabama reveals newly recognized units and supports multi-phase magmatism within the 880 km2 Elkahatchee Quartz Diorite batholith.
Weinmann, Benjamin
core  

Emplacement conditions of magma(s) forming Jurassic plutonic rocks in Gümüşhane (Eastern Pontides, Turkey)

Bulletin of the Mineral Research and Exploration, 2020
In this study, the petrography, mineral chemistry and crystallization conditions were reported for the Alemdar and Işıkdere plutons located in limited areas in the south of the Eastern Pontides. These plutons, which trend mostly in NE-SW directions, were
Emre Aydınçakır, Ramazan Gündüz, Cem Yücel   +2 more
doaj   +1 more source

Impacts of Transient Critical Zone Evolution on Landslide Susceptibility and Hazard Across the Utuado Batholith, Puerto Rico

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Landscapes in humid climates often experience rapid chemical and mechanical weathering that can change groundwater fluxes, drainage pathways, and frictional strength via alterations in subsurface mineral composition and matrix porosity. These changes to hillslope critical zone structure and strength should control landslide susceptibility ...
Jonathan P. Perkins, Mong‐Han Huang, Corina Cerovski‐Darriau, William Schulz, Collin Cronkite‐Ratcliff, Kelli Baxstrom, Mason Einbund, Jane Willenbring, Ben Leshchinsky, Samuel Johnstone   +9 more
wiley   +1 more source

LA-ICP-MS Zircon U-Pb Dating and Geochemistry of Late Cretaceous Quartz Diorite in the Nuri Cu-Mo-W Deposit, South Tibet

Yankuang ceshi, 2015
The Nuri deposit is located at the south margin of the Gangdese metallogenic belt in Tibet. Its mineralization age revealed by Re-Os dating of molybdenite is 23 Ma, which is consistent with that of the Mingze and Chengba deposits.
DONG Sui-liang, HUANG Yong, LI Guang-ming, ZHANG Li, HUANG Han-xiao, ZHANG Hui   +5 more
doaj   +1 more source

Visible to Near‐Infrared Properties of Felsic Rocks: Plagioclase Detection Limits and Applications to Mars Orbital Spectra

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Widespread plagioclase detections on Mars using orbital visible to near infrared (VNIR) reflectance spectra have led to multiple interpretations of “feldspathic” terrain, ranging from ancient crustal material and evolved plutons to volcanic lava flows.
Hunter Vannier, Briony H. N. Horgan, Michael Phillips, Michael Eddy, Rebecca Greenberger, Arya Udry   +5 more
wiley   +1 more source

The Val Biandino Intrusive Suite (central Southern Alps, N Italy): new geochronological and geochemical data on the Early Permian magmatic activity in the Southalpine Domain

Swiss Journal of Geosciences
The Early Permian in the present-day Europe area was a time when a major tectonic shift occurred, leading from the tectonic collapse of the Variscan orogeny to the crustal extension and thinning that characterized the Early Permian times.
Stefano Zanchetta, Chiara Crippa, Andrea Zanchi, Chiara Montemagni   +3 more
doaj   +1 more source

Geochemistry of Umm Rus gold - quartz veins, Central Eastern Desert Egypt. A new contribution [PDF]

, 2001
Gold-bearing quartz veins of the Umm Rus area occur at the south-eastern contact of a Precambrian granodiorite cupola within younger gabbros of 573-615 Ma belonging to the Pan African orogenic belt.
HELMY, H. M., KAMEL, O. A., EL MAHALLAWI, M. M.   +2 more
core  

Origin of Quartz Diorite and Mafic Enclaves in the Delong Gold-Copper Deposit and Evaluation of the Gold-Copper Mineralization Potential

, 2023
The Triassic Paleo-Tethyan magmatic belt in the East Kunlun Orogen (EKO) hosts a small number of porphyry-skarn deposits. The controls of these deposits, especially those in the eastern EKO, are poorly understood.
Gao, Hongze, Lebing Fu, Zhao, Xu, Hongze Gao, Leng, Chengbiao, Ma, Jian, Xu Zhao, Jian Ma, Chengbiao Leng, Yu Xia, Fu, Lebing, Chen, Jiajie, Jiajie Chen, Xia, Yu   +13 more
core   +1 more source

ST Quartz Acoustic Wave Sensors with Sectional Guiding Layers [PDF]

, 2008
We report the effect of removing a section of guiding layer from the propagation paths of ST-quartz Love wave sensors; this offers the ease of fabrication of a polymer guiding layer whilst retaining the native surface of the quartz which may then be used
Michael I. Newton, Newton, Michael, Roach, Paul, Glen McHale, Michael Newton, McHale, Glen, Paul Roach, Newton, MI, McHale, G, Roach, P   +9 more
core   +1 more source

Diachronous Eocene-Oligocene granitoid magmatism in the southeastern part of the Urumieh-Dokhtar magmatic arc, Mardehak area, Jebal-e-Barez, Jiroft [PDF]

پترولوژی
IntroductionThe Zagros orogeny occurred through four main geodynamic events of the Wilson cycle, leading to the formation of the Neotethys oceanic basin: (i) intracontinental rifting in the Carboniferous, (ii) oceanic basin development in the Permian ...
Raziyeh Moradi, Habibollah Ghasemi, Emilio Saccani, Mohsen Mobasheri   +3 more
doaj   +1 more source