The METAL GEAR SOLID team continues to ambitiously explore mature themes such as the psychology of warfare and the atrocities that result from those that engage in its vicious cycle. Driven by revenge, Snake establishes a new private army and returns to the battlefield in pursuit of the shadow group, XOF. The Cold War serves as the backdrop as nuclear weapons continue to shape a global crisis. Nine years after the events of MGSV: GROUND ZEROES and the fall of Mother Base, Snake a.k.a. Alexandrite and green chrysoberyl from Lake Manyara is compared with samples from other occurrences in phlogopite-bearing schist such as the 'classical' alexandrite deposits in the Urals, Russia, and from Novello, Zimbabwe.METAL GEAR SOLID V: The Phantom Pain Ushering in a new era for the franchise with cutting-edge technology powered by the Fox Engine, MGSV: The Phantom Pain will provide players a first-rate gaming experience as they are offered tactical freedom to carry out open-world missions. The designation of samples as alexandrites and a possible distinction from colour-change chrysoberyl is discussed. The complexity of alexandrite colours is clarifi ed to some extent by correlation of colorimetric parameters with trace element contents and with the orientation of the alexandrites.
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Associated with series of channels parallel to the a-axis three groups of elongated or tabular negative crystals oriented in a plane parallel to the a pinacoid form milky white zones in some samples. Common mineral inclusions are phlogopite, apatite and zircon.
Microscopic features of faceted and rough alexandrites are characterized by internal growth structures refl ecting the external morphology of the samples. Single crystals, contact twins, penetration twins and cyclic twins (trillings) are all present in this area and are developed in two major habits, one tabular parallel to the a pinacoid and the other columnar along the a-axis. Emeralds are associated with the pegmatites. The alexandrite crystals are located in a phlogopite- bearing schist which is part of a metamorphic-metasomatic association of mafi c or ultramafi c rocks in contact with pegmatitic intrusions. Mineralogical and gemmological properties of alexandrite from the Mayoka deposit, Lake Manyara mining area, Tanzania, are described. In this book, various applications of X-ray CT in the geosciences are illustrated by papers covering a wide range of disciplines, including petrology, soil science, petroleum geology, geomechanics and sedimentology. Because large numbers of parallel two-dimensional cross-sections can be obtained, three-dimensional representations of selected features can be created. As a non-destructive technique, it is ideally suited for monitoring of processes, such as the movement of solutions and the behaviour of materials under compression. X-ray CT reveals differences in density and atomic composition and can therefore be used for the study of porosity, the relative distribution of contrasting solid phases and the penetration of injected solutions. It was originally developed as a medical imaging technique, but it is now also becoming widely used for the study of materials in engineering and the geosciences. X-ray computed tomography (CT) is a technique that allows non-destructive imaging and quantification of internal features of objects. We suggest a metasomatic system of Cambrian age for alexandritegenesis in the area, involving the interaction of granite-related Be-rich fluids with metaultramafic rocksand peraluminous schists. However, some of themapped rocks are sources for Be (granites), Cr (metaultramafics) and Al (peraluminous schists), the essentialelements for alexandrite crystallization.
No alexandrite-bearingrock has been found in the area, probably due to the intense tropical weathering. They host tectonicslabs of metaultramafic rocks, and are cut by intrusive granites of Cambrian age. Both formations are of Neoproterozoic age. The country rocks arequartz-mica schist and peraluminous mica schist (Salinas Formation), covered by alternating mica schistand quartzite layers (Capelinha Formation). Alexandrite grainsshow angular shapes with very sharp edges, suggesting transport for short distances. The paleo-alluvial deposits are richer in alexandrite,and show well-developed soil horizons covering the alexandrite-bearing gravel layer. The alluvial deposits consist ofresedimented gravel along the present drainage streams. Since 1975, alexandrite, the chromium-bearing crysoberyl variety, has been exploitedfrom alluvial and paleo-alluvial deposits in the Malacacheta region.
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