Results 51 to 60 of about 22,282 (212)

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

Geological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos, Carla Cristine Porcher, Daniel Triboli Vieira, Edinei Koester, Diego Jaldín, Karina Luengo, Luisa Caon   +6 more
wiley   +1 more source

Mineral Chemistry, Whole-Rock Characterization, and EnMap Hyperspectral Data Analysis of Granitic Rocks of the Nubian Shield: A Case Study from Suwayqat El-Arsha District, Central Eastern Desert, Egypt

Geosciences
Gabal (G.) Suwayqat El-Arsha contains two distinct phases of granitoids: I-type granodiorite and A-type monzogranite. Both of them experienced intense fractional crystallization that affected plagioclase, alkali feldspar, quartz, and, to a lesser degree,
Ahmed M. Abdel-Rahman, Bassam A. Abuamarah, Ali Shebl, Jason B. Price, Andrey Bekker, Mokhles K. Azer   +5 more
doaj   +1 more source

Review of the Salpausselkä ice‐marginal formations in Finland

Journal of Quaternary Science, EarlyView.
ABSTRACT Extensive Salpausselkä ice‐marginal formations were deposited in southern and eastern Finland during the Weichselian deglaciation. These comprise three major ridges (I, II, and III Salpausselkäs) and their eastern counterparts (Tuupovaara, Koitere, and Pielisjärvi), together forming laterally continuous ice‐marginal formations extending ...
Jukka‐Pekka Palmu, Jussi Hovikoski, Reijo Pitkäranta, Antti E. K. Ojala   +3 more
wiley   +1 more source

The Cobaw Granodiorite

Castlemaine Naturalist, 1978
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

(Table 2) Potassium, argon and K-Ar dates of the Mazagan granodiorite at V30-225, VA79-96KD and DSDP Hole 79-544A, off Moroccan coast

, 1984
(Table 2) Potassium, argon and K-Ar dates of the Mazagan granodiorite at V30-225, VA79-96KD and DSDP Hole 79-544A, off Moroccan ...
Kreuzer, H, Reinecke, T, Wissmann, Gerd, P Müller (6973373), Gerd Wissmann (6973376), H Kreuzer (6973370), T Reinecke (6973379), Müller, P   +7 more
core   +1 more source

Variation of Sr and Pb isotopes in megacrystic K-feldspar from the Cathedral Peak Granodiorite, California [PDF]

, 2016
In-situ micro-drilling of K-feldspar megacrysts from the Late Cretaceous Cathedral Peak Granodiorite of the Tuolumne Intrusive Suite, California, provided material to study Sr and Pb isotopic compositions and trace element variation recorded by these ...
Munnikhuis, Jonathan
core   +1 more source

Neural Networks and Multivariate Analysis Based on Geochemical Data to Determine Stone Provenance From Ancient Calabrian Quarries (Southern Italy)

Archaeometry, EarlyView.
ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello, Stefano Columbu, Raffaella De Luca, Marco Lezzerini, Mirco Taranto, Fabrizio Antonelli   +5 more
wiley   +1 more source

Biotite composition constrains Tongling skarn Cu–Au mineralization, eastern China

Solid Earth Sciences
Skarn Cu, Au deposits are most important deposit-type in the Tongling region, eastern China, where skarn Au deposits are closely associated with pyroxene monzodiorite, and skarn Cu deposits are genetically related to quartz monzodiorite and granodiorite.
Sujuan Zhou, Qian Feng, Liu Yang, Quanzhong Li, Jun Yan, Qiaoqin Xie, Xiaochun Xu, Jiancheng Xie   +7 more
doaj   +1 more source

Relationship of copper-molybdenum and gold minering with magmatism [PDF]

E3S Web of Conferences
In the investigated deposits, a combination of skarn and hydrothermal mineralization has been identified. Specific facies within intrusive complexes align with distinct postmagmatic formations.
Zhonibekov Bobur, Tulyaganova Nargiza, Adilkhanov Karim, Adilov Bakhram, Abdusamatova Dilafruz   +4 more
doaj   +1 more source

Identification of the first Caledonian A-type granitoids in the southern Qin-Hang belt of south China: Tectonic link to early Paleozoic extension

Solid Earth Sciences, 2023
Evolution of the late Ordovician–Silurian Caledonian orogeny (ca. 460–420 Ma) in the South China Block (SCB) remains controversial due to the overprinting Triassic (Indosinian) and Jurassic-Cretaceous (Yanshanian) orogenic tectonics and the absence of ...
Liuyun Ouyang, Wenting Huang, Jing Wu, Juan Liao, Jian Zhang, Xilian Chen, Huaying Liang   +6 more
doaj   +1 more source