Gotowe bibliografie tematyczne / Younger Granites

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Gotowa bibliografia na temat „Younger Granites”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Younger Granites"

Imeokparia, E. G. "Geochemical evolution of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria." Geological Magazine 122, no. 2 (1985): 163–73. http://dx.doi.org/10.1017/s0016756800031071.

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AbstractThe Jarawa Younger Granite complex is composed of high silica alkali granites that were emplaced 161 Ma ago. The granites are characterized by high contents of Rb, Li, F, Sn, Nb, W above normal low-Ca granitic rocks and have typical S-type characteristics that are indicative of a substantial component of crustal melt.Mineralization in the complex is associated with the biotite granite which was emplaced as a sheet-like body at relatively shallow depth and occurs as disseminations and as greisen lodes and veins.Chemical studies of the granites have shown that the biotite granite represe

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m ABU EL-LEIL ALI, Ibrahim, Abdellah Sadek TOLBA, Hamdy Ahmed Mohamed AWAD, Aleksey Valer’evich NASTAVKIN, Sayed Ahmed OMAR, and Mohamed Galal EL-FEKY. "Geological and geochemical studies on El-Missikat granites, Central Eastern Desert, Egypt." NEWS of the Ural State Mining University, no. 4 (December 20, 2020): 7–18. http://dx.doi.org/10.21440/2307-2091-2020-4-7-18.

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Objective. The present work deals with the detailed investigations of the geology, geochemistry, and tectonic setting of the studied granitic rocks. Research methods. This work involves both field work (Collection samples and drawing of a new geological map) and laboratory work (preparation of thin sections for petrographic studies by polarizing microscope), Atomic absorption, X-ray Fluorescence analysis (XRF) in the Central Laboratories of the Acme in Canada and Mass-Spectrometer with Inductively Coupled Plasma (ICPMS). Result. The study area restricted in the Central Eastern Desert of Egypt

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Abdel Hamid, Amr, Seddik Seddik, Mohamed Hassan, and Hicham Abdel Hamid. "Geology, Petrography, and Geochemistry of Younger Granites and Related Radioactive Pegmatite from Gabal El Urf Area, North Eastern Desert, Egypt: Implications for the Evolution of the NYF-Type Rare-Elements Granitic Pegmatite." Iraqi Geological Journal 56, no. 2E (2023): 1–18. http://dx.doi.org/10.46717/igj.56.2e.1ms-2023-11-6.

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Gabal El Urf region is located in the northern Egyptian Eastern Desert and overlain essentially by older and younger granitoids of Late Proterozoic age. These granitoids contain numerous outcrops of pegmatites, mostly occurring as dikes and veins or huge separated masses. In the contrary, pegmatites form lens-like bodies enclosed within the younger granites along their margins. Previous radiometric surveys showed anomalous concentrations of radioactivity on pegmatite body, located to the south of the study region. The younger granites and the associated radioactive pegmatite are studied in det

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Rashid, S. A., and S. M. Zainuddin. "The Lower Paleozoic Granitic Magmatism Near Ranikhet, Kumaun Himalaya: Major and Trace-Element Geochemistry and Tectonic Setting." Journal Geological Society of India 46, no. 1 (1995): 15–25. http://dx.doi.org/10.17491/jgsi/1995/460102.

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Abstract The Lower Paleozoic Ranikhet granitic rocks lie in between the tectonically active South and North Almora thrust zones and contain two types of granites: a Gneissose granite (GG) and a younger Porphyritic granite (PG). Both the phases show a good correlation in some of the major elements, whereas a wide scatter is observed in the trace-elemental abundances. These Ranikhet granites are Rb rich and Sr poor, they reveal peraluminous characteristics and correspond to the S-type granites. A syn-collisional tectonic environment for these granites is revealed by their Nb+Y and Rb concentrati

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El, Mezayen AM, Bakr MA Abu, HMY Sherif, Nahas HA El, and HH Ali. "Geology and Radioactivity of the Basement Rocks of Wadi El-Sahu Area, Southwestern Sinai, Egypt." Greener Journal of Geology and Earth Sciences 4, no. 1 (2016): 1–22. https://doi.org/10.15580/GJGES.2016.1.021716041.

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The study area is covered by basement and sedimentary rocks. The basement rocks are represented by paragneiss, orthogneiss and younger granites, while the sedimentary succession is represented by clastic Paleozoic rocks. The younger granites are microscopically distinguished into monzogranite and syenogranite. Geochemically, the studied younger granites are peraluminous with alkaline affinity (moderately alkaline) originated in extensional regime. Monzogranite belongs to I-type granite formed in volcanic arc tectonic setting, while the syenogranite belongs to A-type formed in within-plate tect

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Stepanyuk, L., О. Hrinchenko, T. Dovbush, O. Ziultsle, N. Konoval, and T. Mironchuk. "AGE SPAN FORMATION IN GRANITOIDS OF UKRAINIAN SHIELD." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (88) (2020): 12–16. http://dx.doi.org/10.17721/1728-2713.88.02.

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The paper discusses Berdychiv type granitoids that have always stirred up interest among researchers of the Ukrainian Shield. These rocks include minerals that are uncharacteristic of granites - cordierite, sillimanite, andalusite - and are closely related to rocks of the supposed substratum. At the same time, there still remain questions about the genetic nature of Berdychiv granites. Despite the fact that most researchers treat these granites as intrusive (anatectic) formations, there are other concepts according to which these granites are considered to be the products of metasomatic transf

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Lamoso, Ingrid Souto Maia, and Valdecir De Assis Janasi. "SHRIMP U-Pb zircon dating of Neoproterozoic granites from the easternmost São Roque Domain, Ribeira Belt." Geologia USP. Série Científica 19, no. 3 (2019): 55–75. http://dx.doi.org/10.11606/issn.2316-9095.v19-148374.

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Four granitic plutons from the easternmost portion of the São Roque Domain (SRD) were dated by U-Pb zircon SHRIMP; the results indicate that the peak of granitic magmatism was concentrated in a short interval (606–589 Ma), the same as in the central portion of the SRD. The two porphyritic biotite granites (Morro Azul and Imbiruçu) yield the oldest ages (respectively, 601.0 ± 4.9 Ma and 606.3 ± 4.8 Ma) and have inherited zircons with similar ages (~2.1–2.0 Ga), but are not comagmatic. The Morro Azul granite has geochemical signature similar to other high-K calc-alkaline (HKCA) granites from the

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A.Olasehinde, Ashano E.C, and Singh G.P. "ANALYSIS OF MAGNETIC ANOMALY OVER THE RIRUWAI YOUNGER GRANITE RING COMPLEX: A GEODYNAMIC IMPLICATION." Continental J. Earth Sciences 7, no. 1 (2012): 9–18. https://doi.org/10.5281/zenodo.833416.

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The Riruwai Complex constitutes one of the Younger Granite Complexes in Nigeria within the Niger-Nigeria anorogenic belt province, located about 140Km south of Kano. It provides one of the finest examples of the complete cycle of anorogenicmagmaticactivities in Nigerian Province, and consists of alkaline volcanic and plutonic rocks ranging from pyroxene bearing porphyries, rhyolites and comendites, to riebeckite granites. The aeromagnetic intensity field anomaly of the Riruwai Younger Granite ring complex has been studied and analyzed to establish the tectonic nature of the complex and its inf

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Sarvothaman, H., and C. Leelanandam. "Peraluminous, Metaluminous and Alkaline Granites from Parts of Andhra Pradesh and Karnataka in the Dharwar Craton: A Critical Reappraisal of Existing Data." Journal Geological Society of India 39, no. 4 (1992): 279–91. http://dx.doi.org/10.17491/jgsi/1992/390402.

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Abstract Predominant rocks in the Medak-Nizamabad segment in Andhra Pradesh are of a granodiorite-adamellite-granite (GAG) suite; the Alumina Saturation Indices or the molar Al2O2/(CaO + Na2O + K2O) of these units indicate that they arc metaluminous. This suite contains inclusions of a peraluminous tonalite-trondhjemite (IT) suite. A younger peraluminous suite of K-rich granite, granite (s.s.) and adamellite (KGA) intrudes the metaluminous GAG suite and the peraluminous IT suite; a body of alkaline granite intrudes the peraluminous granites. The tonalite-trondhjemite protoliths of the ca. 3000

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Kerr, A., G. R. Dunning, and R. D. Tucker. "The youngest Paleozoic plutonism of the Newfoundland Appalachians: U–Pb ages from the St. Lawrence and François granites." Canadian Journal of Earth Sciences 30, no. 12 (1993): 2328–33. http://dx.doi.org/10.1139/e93-202.

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The posttectonic St. Lawrence and François granites have long been regarded as the youngest Paleozoic plutonic suites of the Newfoundland Appalachians. Their U–Pb ages of 374 ± 2 and 378 ± 2 Ma, respectively, define a Middle to Late Devonian magmatic event. Mid-Carboniferous magmatic and (or) rifting events, suggested on the basis of earlier Rb–Sr dating of the St. Lawrence Granite, are not supported by these new data. Both granites intrude major ductile and brittle structures that were active during the early Paleozoic, and they provide a younger age limit for major tectonic activity in the A

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Rozprawy doktorskie na temat "Younger Granites"

Matsumura, Risa. "The petrogenesis of the Nelshoogte pluton: The youngest and most compositionally variable TTG pluton in the Barberton Granite-Greenstone Terrain." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86589.

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Thesis (MSc)--Stellenbosch University, 2014<br>ENGLISH ABSTRACT: The compositions of tonalite-trondhjemite-granodiorite (TTG)-series rocks from the Barberton Granite-Greenstone Terrain (BGGT) of Southern Africa vary in terms of major element concentrations (leuco-trondhjemites to tonalites), trace elements (e.g. Sr, Rb, REE) and degree of HREE depletion [(La/Yb)N ~ 0.50 - 121]. These geochemical parameters have been interpreted to have significance for the geodynamic processes that produced TTG magmas, particularly the depth of the source. In the Nelshoogte pluton, trondhjemite emplacem

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Richardson, Paul D. "Pluton Zonation Unveiled by Gamma-ray Spectrometry and Magnetic Susceptibility; A Case Study of the Sheeprock Granite, Western, Utah." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/209.

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A radiometric survey of the zoned 21 Ma, A-type Sheeprock granite, western Utah, combined with measurements of magnetic susceptibility and field observations were analyzed using a geographic information system. The intrusion spans 25 square km and is roughly eliptical in shape with its long axis trending northwest. Concentration maps (composed of more than 500 survey stations) of eU, eTh, texture, magnetic susceptibility, color, and joint density help to constrain magmatic and post-magmatic processes related to its chemical and physical zonation. Uranium ranges from 3.9 to 26.9 ppm (mean 12.7)

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Catherall, D. J. "The geology of an area near Shabani, Rhodesia, with special emphasis on an occurrence of younger granite." Thesis, 2014. http://hdl.handle.net/10539/15961.

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Książki na temat "Younger Granites"

Nichols, Roy F. Franklin Pierce: Young hickory of the Granite Hills. 2nd ed. Easton Press, 1988.

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Franklin Pierce: Young Hickory of the Granite Hills. American Political Biography Press, 1993.

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Nichols, Roy F. Franklin Pierce: Young Hickory of the Granite Hills. University of Pennsylvania Press, 2015.

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Bouchez, Jean-Luc, and Adolphe Nicolas. Principles of Rock Deformation and Tectonics. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192843876.001.0001.

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This book, based on laboratory, teaching and field experience, has a strong focus towards hard rocks and magmatic rocks, from both the continental crust worldwide, where quartz and granites are dominant, and the mantle dominated by olivine in peridotites. With more than 250 figures, most of them original, the book develops, in addition to classical structural geology objects, the fundamentals of brittle fracturing of materials, plastic deformation of ice, quartz and olivine, and fabric acquisition in rocks and magmas. Measurement and orientation of stress axes, bases of neotectonics and geophy

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Marianno, Scott D., and Reid L. Neilson. The Salt Lake Temple. Oxford University PressNew York, NY, 2025. https://doi.org/10.1093/9780190881580.001.0001.

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Abstract Even before the dust had settled on their refuge in the Rocky Mountains in 1847, the prophet-colonizer Brigham Young declared a spot for a temple for members of the Church of Jesus Christ of Latter-day Saints. He imagined the temple as the centerpiece of a new kingdom headquartered in what would become Salt Lake City, Utah. The Salt Lake Temple tells the story of the temple’s transformation from an improvised community project to the premier icon, symbol, and sacred space of a now global religion. The success of the temple project was far from inevitable but relied on the commitment,

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Części książek na temat "Younger Granites"

Obaje, Nuhu George. "The Younger Granites." In Lecture Notes in Earth Sciences. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-92685-6_3.

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Wright, J. B. "The Younger Granites." In Geology and Mineral Resources of West Africa. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-015-3932-6_15.

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Ashano, Edafetano Christopher, and Adeyinka Olasehinde. "The Nigerian Younger Granites Province." In Geology and Natural Resources of Nigeria. CRC Press, 2024. http://dx.doi.org/10.1201/9781003454908-6.

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Bakhit, F. S., H. A. Hussein, and M. M. Ali. "Geotectonics and Characteristic Features of Fertile and Non-Fertile Younger Granites, Eastern Desert, Egypt." In Proceedings of the International Conferences on Basement Tectonics. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4800-9_1.

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Cohen, Jeffrey Jerome, and Allan Mitchell. "Oceanic Dispatches." In Oceanic New York. punctum books, 2015. https://doi.org/10.21983/p3.0112.1.20.

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Iam landlocked anddreaming of the sea.Born near the coast, companioned by storms and swells, I’ve grown weary of summer thundershowers, puddles, brooks that purl, the mud under gutters, water without brine. I miss the ocean’s tang, touch and din. The Atlantic has a language even cloudbursts cannot translate. Not knowing how else to capture something marine, this morning I added sea salt to a milk glass and filled it from the tap. Into my kitchen sea I dropped a stone and scallop shell. Speckled granite plaything of the waves, the rock is round like an egg. I am guessing that breakers rolled it

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A. El Bahariya, Gaafar. "An Overview on the Classification and Tectonic Setting of Neoproterozoic Granites of the Nubian Shield, Eastern Desert, Egypt." In Geochemistry. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95904.

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Granites constitute the main rock components of the Earth’s continental crust, which suggested to be formed in variable geodynamics environments. The different types of granitic rocks, their compositional characteristics, tectonic settings and magma sources are outlined. Mineralogical classification of granites includes four rock types: tonalites, granodiorites, granite (monzogranite and syenogranites) and alkali-feldspar granites. Alphabetical classification subdivided granites into: I-type, S-type, A-type and M-type granites. Moreover, formation of granitic magmas requires distinctive geodyn

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Michelfelder*, Gary S. "Petrology and volcanology of the Mesoproterozoic igneous rocks of the Saint Francois Mountains terrane, southeast Missouri, USA." In Field Excursions from the 2021 GSA Section Meetings. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.0061(11).

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ABSTRACT The Saint Francois Mountains are the physiographic expression of the central part of the Ozark Dome of southeastern Missouri. The mountains are made up of a quaquaversal-dipping series of Paleozoic units cored by the Mesoproterozoic-aged rocks of the broader Saint Francois Mountains terrane. The Saint Francois Mountains terrane lies within the Eastern Granite-Rhyolite province along the eastern margin of Laurentia and contains at least four mapped caldera complexes (Eminence, Lake Killarney, Butler Hill, and Taum Sauk), associated volcanic and volcaniclastic rocks, and four distinct t

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Thompson, M. D., S. M. Barr, and J. C. Pollock. "Evolving views of West Avalonia: Perspectives from southeastern New England, USA." In New Developments in the Appalachian-Caledonian- Variscan Orogen. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.2554(03).

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ABSTRACT Southeastern New England is largely composed of Ediacaran granitoid and related volcanic rocks formed during the main phase of arc-related magmatism recorded in West Avalonian lithotectonic assemblages extending through Atlantic Canada to eastern Newfoundland. In situ Lu-Hf analyses presented here for zircons from the Dedham, Milford, and Esmond Granites and from the Lynn-Mattapan volcanic complex show a restricted range of εHf values (+2 to +5) and associated Hf-TDM model ages of 1.3–0.9 Ga, assuming felsic crustal sources. The most evolved granites within this suite lie in a belt no

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Indares, Aphrodite, Abdelali Moukhsil, and Pierre-Arthur Groulier. "Geon 14 to early Geon 13 granitoid magmatism in the Grenville Province of Canada, northeastern Laurentia: Distribution, geochemical patterns, and links with an active-margin setting." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(17).

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ABSTRACT Mesoproterozoic crust is widely exposed in the Grenville Province portion of northeastern Laurentia, where it is interpreted as an assemblage of two continental-arc segments separated by a composite arc belt (Quebecia) with island-arc remnants. A synthesis of the geologic context, types, and geochemical patterns of 1.5–1.35 Ga granitoids reveals a regional distribution in each segment, with dioritic to granitic plutonism variably associated with arc-related volcano-sedimentary belts in the south and inboard monzonitic to granitic plutonism in the north. In addition, belts of dioritic

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Hutchison, Charles S. "Non-volcanic epithermal deposits." In South-East Asian Oil, Gas, Coal and Mineral Deposits. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780198542957.003.0010.

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Abstract Stibnite, stibnite-gold, and stibnite-gold-scheelite mineralization is confined to the Sundaland continental cratonic core area of SE Asia. This gold association .is distinctly different from the gold-silver-telluride association of the Cainozoic volcanic arcs. By contrast it is confined to areas of continental crust characterized by high level granite, granodiorite and diorite plutons, which may have provided the heat source to mobilize the metals from the old continental crustal infrastructure. Volcanic activity is lacking. There is commonly an important mercury association (Figs 9.

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Streszczenia konferencji na temat "Younger Granites"

Amuda, Abdulgafar Kayode, Musa Bala Girei, Saleh Ibrahim Bute, Auwalu Yola Lawan, Safiyanu Muhammad Elatikpo, and Yekeen Salau Agunleti. "DECODING THE EVOLUTION OF PYROCHLORE-BEARING ANOROGENIC ALKALI GRANITES BASED ON ZIRCON U-PB-HF ISOTOPES AND CHEMICAL FEATURES: A STUDY FROM THE YOUNGER GRANITE PROVINCE, NORTHCENTRAL NIGERIA." In GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-380033.

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Ratcliffe, Nicholas M. "STRUCTURAL PETROLOGY OF THE LATE ORDOVICIAN APPINITE COMPLEXES OF THE CORTLANDT INTRUSIVE SUITE (CIS) AND YOUNGER EARLY SILURIAN(?) GRANITES ALONG CAMERONS LINE." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344101.

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Gaines, S., and M. S. Diederichs. "Axial Stiffness Evolution of Rock Observed During Uniaxial and Triaxial Compression Strength Tests." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0775.

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ABSTRACT: Elastic properties, including Young's modulus and Poisson's ratio, are commonly reported parameters estimated from standard compression strength tests of intact rock core. Although it is recognized that axial stiffness is not constant during loading, Young's modulus is often estimated at a pre-defined portion of the stress-strain curve, typically at approximately 40-50% of the peak strength. Poisson's ratio, which is an indication of the axial to lateral strain response, is also highly non-linear and varies throughout the loading cycle as damage is initiated and accumulates in the ro

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Fu, Xinkang, Zhongwei Huang, Hongzhi Wu, Huaizhong Shi, Jiawei Zhang, and Guodong Ji. "Experimental Investigations on the Effect of High Temperature and Pressure on the Mechanical Properties and Drillability of Granite." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0186.

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ABSTRACT Hot Dry Rock (HDR) is an important clean energy resource. However, there are many problems in the exploration of HDR, which are closely related to the geological environment and properties of HDR. The representative lithology of HDR is granite. Granite has the characteristics of poor drillability, high hardness and strong abrasive property in underground high-temperature and high-pressure environment. Therefore, the effect of temperature and pressure on physical and mechanical properties and drillability of granite was explored with deep water pore pressure servo system and rock drill

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Lokajícek, T., D. Rimnácová, M. Petružálek, et al. "Westerly Granite Study of Physical and Transport Properties Monitored by P and S Waves on Spherical Samples: Effect of Temperature and Hydrostatic Pressure." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0553.

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ABSTRACT: We investigate the thermal damage of Westerly granite (WG) using ultrasonic methods, mercury intrusion porosimetry, and micrographic observations. WG is of interest due to its relatively high strength and low permeability in intact conditions. Our study focuses on the impact of pressure and temperature on simultaneous heating of two spherical specimens to mitigate the effects of heterogeneity. The spheres were heated to temperatures of 100°C, 200°C, 350°C, 500°C, 650°C, and 800°C. One sphere was designated for a comparative study to measure changes in weight and size, while the secon

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Andrew, Joseph E. "CONSTRAINTS ON LARGE-MAGNITUDE EXTENSION OF DEATH VALLEY, CALIFORNIA: INSIGHT FROM THE WORLD’S YOUNGEST RAPAKIVI GRANITES." In Joint 70th Annual Rocky Mountain GSA Section / 114th Annual Cordilleran GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018rm-314292.

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Kawaguchi, Sota, and Tada-nori Goto. "Hydraulic permeability of granitic bedrock estimated from resistivity and young's modulus." In The 13th SEGJ International Symposium, Tokyo, Japan, 12-14 November 2018. Society of Exploration Geophysicists and Society of Exploration Geophysicists of Japan, 2019. http://dx.doi.org/10.1190/segj2018-084.1.

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Knippel, E. P., C. Wu, Q. Xiong, A. P. Villaquiran Vargas, and J. C. Hampton. "Stress and Load Path Dependent Static and Dynamic Moduli and Ultrasonic Velocities in Granite." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0444.

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ABSTRACT: We performed a study of ultrasonic velocity as a function of stress and stress path using axial and radial ultrasonic P and S-waves. Young's modulus and Poisson's ratio are calculated using these velocities along axial and radial directions. Static elastic moduli are also measured along the same stress and stress path protocol. Effects of pre-existing microcracks in the sample are hypothesized via directional observations of velocity changes as a function of differential stress and mean stress. Dynamic Young's modulus is observed to increase primarily as a function of mean stress, wh

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Hajiabadi, Seyed Hasan, Mahmoud Khalifeh, and Reinier van Noort. "Hydro-Mechanical Behavior of a Granite-Based Geopolymer Sealant Exposed to MgCl2-Brine: Implications for CO2 Geosequestration." In SPE/IADC International Drilling Conference and Exhibition. SPE, 2025. https://doi.org/10.2118/223651-ms.

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Abstract The stability of geopolymers (GPs) as alternatives to Portland cement for CO2 geosequestration is critically dependent on their performance under brine exposure typical of downhole conditions. This study investigates the hydro-mechanical behavior of a granite-based GP system subjected to brines of different MgCl2 concentrations (0-15 wt.%). The use of MgCl2 brines as opposed to the more commonly studied NaCl solutions addresses the often-overlooked impact of Mg2+ ions. Employing an imposed flow technique, GP samples were subjected to MgCl2 brines at 90°C and a confining pressure of 13

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Lokajícek, Tomáš, Ali Aminzadeh, Matej Petružálek, Daniela Rimnácová, and Richard Prikryl. "Porosity and Engineering Parameters of Thermally Degraded Westerly Granite." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0378.

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ABSTRACT We present a textural analysis study based on the combination of ultrasonic testing (UT) and mercury intrusion porosimetry (MIP) of 36 Westerly granite (WG) samples exposed to different heating temperatures in the range between 100°C and 800°C. Specimens subjected to elevated temperature treatment were also subjected to the thin section analysis. Identical WG cylindrical specimens with diameter 11.5 and height 15 mm were used for UT and MIP study. UT of all specimens was made by P and S wave 1 MHz resonant frequency sensors. It was found that P-S wave velocity, amplitude, frequency an

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Raporty organizacyjne na temat "Younger Granites"

Thomas, M. D. Magnetic and gravity models, northern half of the Taltson Magmatic Zone, Rae Craton, Northwest Territories: insights into upper crustal structure. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/328244.

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A prominent magnetic low along an eastern portion of the Paleoproterozoic Taltson magmatic zone (TMZ) correlates mainly with the youngest granitoid in the zone, the peraluminous ca. 1936 Ma Konth granite. Flanking belts of higher magnetic intensity coincide mainly with slightly older Taltson plutonic rocks (e.g. ca. 1986 Ma Deskenatlata granodiorite, ca. 1955 Ma Slave granite) to the west and Neoarchean and/or Paleoproterozic gneisses of the Rae Craton to the east. A prominent gravity low along a portion of the northeastern margin of the TMZ correlates mainly with the Konth granite. Modelling

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Neyedley, K., J. J. Hanley, Z. Zajacz, and M. Fayek. Accessory mineral thermobarometry, trace element chemistry, and stable O isotope systematics, Mooshla Intrusive Complex (MIC), Doyon-Bousquet-LaRonde mining camp, Abitibi greenstone belt, Québec. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328986.

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The Mooshla Intrusive Complex (MIC) is an Archean polyphase magmatic body located in the Doyon-Bousquet-LaRonde (DBL) mining camp of the Abitibi greenstone belt, Québec, that is spatially associated with numerous gold (Au)-rich VMS, epizonal 'intrusion-related' Au-Cu vein systems, and shear zone-hosted (orogenic?) Au deposits. To elucidate the P-T conditions of crystallization, and oxidation state of the MIC magmas, accessory minerals (zircon, rutile, titanite) have been characterized using a variety of analytical techniques (e.g., trace element thermobarometry). The resulting trace element an

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Steenkamp, H. M., N. Wodicka, O. M. Weller, et al. Bedrock geology, Wager Bay area, Kivalliq, Nunavut, parts of NTS 56-F, G. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331890.

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New geological mapping in the Tehery Lake-Wager Bay area of northwestern Hudson Bay, Nunavut, frames the emplacement, depositional, and metamorphic histories of the dominant rock types, major structures, and links to neighbouring areas of the central Rae Craton and Chesterfield Block. The area is divided into six domains (Ukkusiksalik, Douglas Harbour, Gordon, and Lunan domains presented here, and Kummel Lake Domain and Daly Bay Complex on adjoining maps) defined by large-scale structures and characterized by differing metamorphic assemblages, Sm-Nd and U-Pb isotopic data, and/or specific lith

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Steenkamp, H. M., N. Wodicka, C. J M Lawley, et al. Bedrock geology, Daly Bay area, Kivalliq, Nunavut, NTS 56-A, 46-D west, 46-E southwest, and 56-H south. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331888.

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New geological mapping in the Tehery Lake-Wager Bay area of northwestern Hudson Bay, Nunavut, frames the emplacement, depositional, and metamorphic histories of the dominant rock types, major structures, and links to neighbouring areas of the central Rae Craton and Chesterfield Block. The area is divided into six domains (Ukkusiksalik, Douglas Harbour, and Gordon domains and Daly Bay Complex presented here, and Lunan and Kummel Lake domains on adjoining maps) defined by large-scale structures and characterized by differing metamorphic assemblages, Sm-Nd and U-Pb isotopic data, and/or specific

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Steenkamp, H. M., N. Wodicka, C. J M Lawley, et al. Bedrock geology, Armit Lake area, Kivalliq, Nunavut, NTS 56-B and 56-C east. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331889.

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New geological mapping in the Tehery Lake-Wager Bay area of northwestern Hudson Bay, Nunavut, frames the emplacement, depositional, and metamorphic histories of the dominant rock types, major structures, and links to neighbouring areas of the central Rae Craton and Chesterfield Block. The area is divided into six domains (Gordon, Lunan, and Kummel Lake domains presented here, and Ukkusiksalik and Douglas Harbour domains and Daly Bay Complex on adjoining maps) defined by large-scale structures and characterized by differing metamorphic assemblages, Sm-Nd and U-Pb isotopic data, and/or specific

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Herring, Theodore, Justin Tweet, and Vincent Santucci. Wind Cave National Park: Paleontological resource inventory (public version). National Park Service, 2023. http://dx.doi.org/10.36967/2299620.

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Wind Cave National Park (WICA), the first cave in the world to become a national park, is famous for the park’s namesake feature. Wind Cave, named for the noticeable wind-flow patterns observed as air moves in and out of the natural cave entrance, is currently the third longest cave system in the United States and seventh longest in the world. Wind Cave formed when groundwater dissolved buried layers of the fossiliferous Madison Limestone, which were deposited during the Mississippian subperiod approximately 359 to 347 million years ago. In addition to the Madison Limestone, several other form

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Peterson, T. D., N. Wodicka, S J Pehrsson, et al. The Rae Province at 2.6 Ga: a sanukitoid storm on the Canadian Shield, Nunavut. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/332505.

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Between 2.62 and 2.58 Ga, Rae Province was intruded from Lake Athabasca to Melville Peninsula (more than 1700 km) by mafic to felsic plutons (Snow Island Suite), and overlain by volcanic rocks that are now mostly preserved beneath Paleoproterozoic basins. The Snow Island Suite was preceded by offshore arc volcanism and possible back-arc basin activity, with a U-Pb age peak at 2.635 Ga (Marjorie peak). About 50% of the Snow Island Suite is an infracrustal granitoid with K-enriched and tonalitic subtypes; the remainder lies on a sanukitoid spectrum. The sanukitoidal rocks are dominantly orthopyr

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