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Andrea R. Biedermann
Empirical relationships between magnetic fabrics and deformation have long served as a fast and efficient way to interpret rock textures. Understanding the single crystal magnetic properties of all minerals that contribute to the magnetic anisotropy of a...
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Eugenio Fazio, Patrizia Fiannacca, Damiano Russo and Rosolino Cirrincione
Late-Variscan granitoid rocks of trondhjemitic and granitic composition, intruded in migmatitic paragneisses in the north-eastern Peloritani Mountains (southern Italy) at ~310 Ma and ~300 Ma, respectively, exhibit a range of deformation microstructures d...
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Haibo Li, Zhonghua Tang and Dongjin Xiang
Acid in situ leaching (ISL) is a common approach to the recovery of uranium in the subsurface. In acid ISL, there are numerous of chemical reactions among the injected sulfuric acid, groundwater, and porous media containing ore layers. A substantial amou...
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Jacinta García-Talegón, Adolfo Carlos Iñigo, Rosa Sepúlveda and Eduardo Azofra
After subjecting Zamora building stones to accelerated ageing tests, colour changes were studied, namely: (a) freezing/thawing and thermal shock (gelifraction and thermoclasty), and (b) combination of freezing/thawing plus thermal shock and salt crystall...
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Muhamad Ragil Setiawan, Mochamad Iqbal, Rahmat Nawi Siregar
Pág. 206 - 214
Rock formation in a region is influenced by many factors such as tectonic and volcanic systems of the area. Both activities will affect the microstructure of the rock. This study analyzes mineral composition in three different rocks. We display the digit...
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John L. Manrique C.,José E. Ortiz,Antonio Delgado H.
Pág. 75 - 92
Vanadium (V) and uranium (U) are critical elements for the energy and technology industry. They are characterized by low abundance in the earth crust´s rocks, but can be concentrated and give rise to sedimentary mineral deposits as a result of redox proc...
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Amit Rotem, Alexander Vidal, Katharina Pfaff, Luis Tenorio, Matthias Chung, Erik Tharalson and Thomas Monecke
Understanding the mineralogy and geochemistry of the subsurface is key when assessing and exploring for mineral deposits. To achieve this goal, rapid acquisition and accurate interpretation of drill core data are essential. Hyperspectral shortwave infrar...
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Hamid Zagalo Al-hadj, Pierre Rochette and Mahamat Tahir Abakar Djiddi
The present study focused on the petrography and geotechnics of aggregates of two sites around the city of Mongo for their use in construction. The study area is located in central Chad, in the Guéra province, at the eastern and north-western entrance to...
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Daiqi Li, Bin Tang, Xi Lu, Quanxiang Li, Wu Chen, Xiongwei Dong, Jinfeng Wang and Xungai Wang
In this study, a single firing was used to convert stabilized polyacrylonitrile (PAN) fibers and ceramic forming materials (kaolin, feldspar, and quartz) into carbon fiber/ceramic composites. For the first time, PAN carbonization and ceramic sintering we...
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Zhichao Yu, Siyu Yang, Keyu Liu, Qingong Zhuo and Leilei Yang
The interaction between CO2 and rock during the process of CO2 capture and storage was investigated via reactions of CO2, formation water, and synthetic sandstone cores in a stainless-steel reactor under high pressure and temperature. Numerical modelling...
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Stefan Richter,Jens Götze,Hans Niemeyer,Robert Möckel
Pág. 386 - 396
In the present study a first found of agates in Chile is reported from the Cordón de Lila region in northern Chile. The agates occur as veins and lenses in altered Permian volcanic rocks. The rock composition is rhyodacitic/ dacitic consisting of a fine-...
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Gary S. Michelfelder, Todd C. Feeley, Alicia D. Wilder and Erik W. Klemetti
To better understand the origin of across-strike K2O enrichments in silicic volcanic rocks from the Andean Central Volcanic Zone, we compare geochemical data for Quaternary volcanic rocks erupted from three well-characterized composite volcanoes situated...
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Daniela Welkner,Estanislao Godoy,Heinz-J Bernhardt
Pág. 3 - 15
The Late Cretaceous Del Salto Pluton is one of the four Late Jurassic to Late Miocene intrusives that are recognized ca. 60 km inboard from the eastern limit of the Patagonian Batholith, close to the Chilean-Argentinian border. The pluton is a fluorite-b...
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Andrew C. Kurtz,Suzanne M. Kay,Reynaldo Charrier,Edward Farrar
Pág. 75 - 90
ABSTRACT. 40Ar/39Ar mineral dating and whole rock chemical analyses of Miocene to Pliocene Andean granitoids near the El Teniente copper deposit (34°S) provide new evidence for rapid Neogene exhumation. This exhumation is attributed to crustal thickening...
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Andrew C. Kurtz,Suzanne M. Kay,Reynaldo Charrier,Edward Farrar
Pág. 75 - 90
ABSTRACT. 40Ar/39Ar mineral dating and whole rock chemical analyses of Miocene to Pliocene Andean granitoids near the El Teniente copper deposit (34°S) provide new evidence for rapid Neogene exhumation. This exhumation is attributed to crustal thickening...
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Shu Zhang, Yong Zhang, Gang Huang, Bo Zhang, Yichan Li, Xin Chen, Junkang Xu and Yujie Wei
Granites, widely distributed in the Earth?s crust, undergo pedogenic processes, shaping diverse soil-mantled landscapes influenced by climatic factors in different regions. Investigating the geochemical signatures in granite weathering profiles across va...
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Naseem Akhtar, Muhammad Izzuddin Syakir, Saleh Ali Tweib, Muhammad Irman Khalif Ahmad Aminuddin, Mohamad Shaiful Md Yusuff, Abdullah H. Alsabhan, Faisal M. Alfaisal, Shamshad Alam and Jibran Qadri
Soil is a heterogeneous material, and its properties are vital from an agricultural perspective and for groundwater management. However, limited studies have been performed on the soil characteristics (soil texture, water-holding capacity, and soil compo...
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Evgeny Abakumov, Timur Nizamutdinov, Alla Lapidus, Georgy Istigechev and Sergey Loiko
The Chernevaya taiga is a unique ecosystem formed under the influence of a complex of geogenic and bioclimatic factors located in the foothill border of the southeastern part of Western Siberia. The combination of local climatic conditions and the compos...
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Abdallah Atef, Adel A. Surour, Ahmed A. Madani and Mokhles K. Azer
Since Antiquity, sustainable resources of gold and copper have been mined at two prominent prospects in the north Eastern Desert of Egypt, namely the south Gabel Um Monqul (SGUM) and Gabal Al Kharaza (GKZ). Mineralization is hosted by Neoproterozoic shie...
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Muhammad Nawaz, Waqas Ahmed, Muhammad Yasir, Ihtisham Islam, Hammad Tariq Janjuhah, George Kontakiotis, Assimina Antonarakou and Christina Stouraiti
The utilization of dimension stone in construction has been prevalent since ancient times; however, its application in modern construction has gained significant attention over the last few decades. This research aimed to assess the physical and strength...
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