Because it is a gas, radon may move freely between cracks and gapsin the ground, seeping upwards into the buildings and in the environment.
Galo e urubu series#
As an unstable atom, uranium undergoes radioactive decay with thegeneration of a series of decay by-products, including radon, which may be highly genotoxic and trigger severalpathological processes, among which cancer. Natural radiation of geological origin is a common phenomenon in Brazil, a country where radioactive agentssuch as uranium may be often found. The observed mineral zoning enables us to classify it as a Is the quartz nucleus, composed of milky and rosacea quartz. In the innermost part of the pegmatite, there In a smaller quantity there is the occurrence of arrojadita and espersatita. Zone III is composed of quartz, feldsparĪnd mica and it is where the majority of the minerals of economic interest (especially tantalite and beryl) are concentrated,
The body, measuring about 30 cm in width and consisting essentially of muscovite.
Zone I corresponds to the outermost part of Mineral zoning, namely: i) border zone (zone I) ii) zone III and iii) quartz core. Meters long and 18 meters wide and N-S direction, in agreement with the foliation of the schist. The studied pegmatite has an elongated shape, it is about 106 In these rocks foliation Sn and Sn+1, as well as crenulations. Muscovite and granade porphiroblasts, in some cases, there are cordierite centimeter nodules. The region present a dark, grayish coloration, fine to medium granulation, and are composed mainly of quartz, biotite, Schists and pegmatites intruded in the form of dikes and sills are very common in the place. The geological mapping made it possible to observe the predominance of the rocks of the Seridóįormation. In the region we studied, 42 outcrops were described, in each of them the main textures and mineralogical aspects PPB is known worldwide for the abundance of pegmatites, with some incidence of mineralizedīodies. (PPB), the area that has the greatest concentration of pegmatites in the Brazilian Northeast, corresponding to the eastern The Alto do Urubu Pegmatite is located in the municipality of Picuí, northern of Paraíba, in Borborema Pegmatitic Province
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