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Hercynian metamorphism and magmatism in the Cap de Creus peninsula (eastern Pyrenees) occurred contemporaneously with non-coaxial deformation in a transpressive regime. An example of this has been taken from a migmatite complex in the northern coast. The studied area is formed by partially melted sil-limanite schists together with two different suites of igneous rocks: a calc-alkaline magmatic sequence, consisting of small granitoid bodies, and later peraluminous leucogranites and pegmatites. All these rocks occur within a NE-SW- to E-W-trending sub-vertical high-strain zone, where a first schistosity is tightly folded and transposed. The relations between folds and crenulation cleavage in the metasediments and deformational fabrics in the granitoids and migmatites provide good evidence for the penecontemporaneity of deformational processes, magmatism and migmatization. Furthermore, the analysis of cross-cutting relationships between different granitoids as well as the observation of their different degrees of deformation verifies that magmatism in this area took place as synkinematic consecutive intrusions from the more basic magmas to the peraluminous acid dykes.
For several decades geologists have been applying field, petrographic, and geochemical methods to study the diagenesis of limestones, dolomites, evaporites and sandstones. The most successful studies have integrated field and petrographic work with various geochemical methods. For most applications, the value of any one of the most commonly applied techniques has often been limited; however, when applied together they have proven very useful. Careful petrography has been the most important and reliable component of diagenetic studies.
Down-valley discharge of tailings in a valley storage, where practical, can provide a cost benefit through minimizing the size of the containment embankment. However, down-valley discharge results in water pooling against the containment embankment and the collection of finer, saturated material that can be subject to rapid strength loss. These factors limit the potential for upstream raise construction and can also present a long-term dam break risk if the embankment is not appropriately designed. A down-valley layout can also present an erosion and sediment release risk at closure.
A breach occurred within the perimeter embankment of the Mount Polley Tailings Storage Facility on August 4, 2014. The loss of containment was sudden and occurred without warning. An Independent Expert Engineering Investigation and Review Panel (IEEIRP or panel) was quickly commissioned by the British Columbia Ministry of Energy and Mines. The IEEIRP consisting of Norbert Morgenstern (Chair), Stephen Vick, and Dirk van Zyl released their report on the Mount Polley Tailings Storage Facility Breach on January 30, 2015. <...>
Tailings are a waste product of the mining process. Described simplistically, material excavated from the mine is categorized as either ore or waste, and waste is generally hauled to a waste rock storage facility while ore is hauled or conveyed to a mill and plant for processing. Ore is processed to extract a desired commodity and the remaining material is considered tailings, which also includes any chemical additives and water that may have been used during processing. Water may be recovered from the tailings and recirculated through the process plant prior to transporting the tailings to a tailings storage facility (TSF) or using the tailings as backfill for underground mine voids. <...>
It is not much to document the origin of bird flight. Strictly speaking, these specimens are not the entire body of evidence. There are, of course, other fossil birds, not to mention bats, pterodactyls, and insects that have a few things to say about bird flight. And there are living creatures, mathematical models, and aerodynamic theories to help us understand this amazing evolutionary accomplishment. Nonetheless, these seven specimens are crucial. They lie at the heart of complex debates that began with the discovery of the first specimen of Archaeopteryx more than 130 years ago and continue up until today. These few, special fossils have served as the basis for brilliant deductions, wild speculations, penetrating analyses, and amazing insights. They have revealed—and continue to reveal—not only the pathway through which birds and bird flight may have originated, but they also tell us much about the strengths and weaknesses of science and scientists. <...>
This introduction chapter of the book provides a summary of its nine key chapters. Structural geology and tectonics has progressively become more quantitative. To keep the pace, instructors of these subjects need to upgrade their teaching contents. This book presents issues related to (i) evaluation system of students using the peers, (ii) use of new instruments in measuring structural data from rocks, (iii) paleomagnetic studies in tectonics, (iv) sub-surface structural interpretations required in industries, (v) field studies in structural geology, (vi) interdisciplinary aspects of structural geology, (vii) teaching structural geology and tectonics in Indian context, (viii) conducting practical classes in structural geology with map interpretations and (ix) and simple geomechanical problems and solutions. <...>
This report is a Geological Report, as that term is defined in the policies of the TSX Venture Exchange and has been prepared in connection with a fundamental acquisition filing pursuant to Policy 5.3 of the Exchange. Fremont Gold Ltd. has executed an option on the Vardenis Property, a gold, silver and potential copper porphyry prospect, located in Central Armenia, about 20km south of Lake Sevan, dated May 2023. The property is held by an Armenian company, Mendia Resources, LLC, who hold the 9399 hectare geological exploration permit, number EHT-29/370 “Vardenis”, Vayots Dzor region, Armenia, issued by the Ministry of Territorial Administration and Infrastructure, (MTAI), dated April 10th, 2003, valid for three years, renewable. Fremont has an exclusive option to earn 100% of this property, which occurs in stages over 3 years. <...>
In Liberia, Mano has interests in 3 mineral licences with gold exploration activity. To date most exploration has focused on the 100,000 hectare license known as the Bea Mountain Mineral Development Agreement (BEA-MDA) in western Liberia. Mano has a 100% interest in the BEA-MDA license subject to a 10% free carried interest and a 3% royalty in favour of the Republic of Liberia. The MCA reconnaissance license (1,500,000 hectares) is held under a Mineral Cooperation Agreement (MCA) with the Republic of Liberia.
Concepts and Methodologies of Environmental Hazards and Disasters Nicolas R. Dalezios, George P. Petropoulos, and Ioannis N. Faraslis
Indigenous Knowledge for Disaster Solutions in the Hilly State of Mizoram, Northeast India Kewat Sanjay Kumar, Awadhesh Kumar, Vinod Prasad Khanduri, and Sudhir Kumar Singh
Urban Risk and Resilience to Climate Change and Natural Hazards: A Perspective from Million-Plus Cities on the Indian Subcontinent Amit Kumar, Diksha, A. C. Pandey, and M. L. Khan
The Contribution of Earth Observation in Disaster Prediction, Management, and Mitigation: A Holistic View Varsha Pandey, Prashant K. Srivastava, and George P. Petropoulos