Cosmostructural model of the Kalgutinskiy rare-metal deposit area (Mountainous Altai)

Cosmostructures of the Kalgutinskiy rare-metal deposit area (Mountainous Altai) have been studied on the materials of multispectral space survey Landsat ETM+ and radar-tracking survey SRTM. The area is localized inside of the large ring structure of a complex construction, characterized by the long multistage (multipulse) development. Immersing of the root (focus) part of the structure from the north - northwest to the east - southeast is established. Position of the ring structure is controlled by the crossing knot of fracture zones of northwest, northeast and northeast - sublatitudinal directions. The Kalgutinskiy granite massif and the deposit itself are located in the internal belt of the structure in the ring 15,2 km in diameter. The perspective of ore-bearing ability of the southeast part of the area is highly evaluated in connection with development of small ring structures of the second typ

Гигиеническая оценка индивидуальных годовых доз природного облучения населения модельных территорий Алтайского края

The goal is to determine ionizing radiation natural sources exposure regularities of Altai Territory model areas population. The materials and methods. 11376 radon measurements, 1247 gamma radiation meas-urements in an open area and in residential and office buildings were performed, selection of 189 drinking water tests was carried out. Results. Complex radiation and hygienic examination of the region with the most large municipalities number with model areas allocation was conducted. The assessment of the Altai Territory population’s individual annual radiation doses from natural radionuclides has revealed a number of the regularities depending on the terrain’s ecological and geographical type. Following the research results, ranging the region territories taking into account of annual effective doses of the population from natural sources for 2009-2015 was carried out. The annual individual effective dose of the Altai Territory upland areas population presented by the highest values and ranges from 7.36 mSv / year to 8.19 mSv / year. Foothill regions of Altai and in Salair ridge are characterized by increased population exposure from natural sources. Here the dose ranges from 5.09 mSv / year to 6.22 mSv / year. Steppe and forest-steppe territories are characterized by the lowest level of the natural radiation which is ranging from 3.23 mSv / year to 4.11 mSv / year, that doesn’t exceed the all-Russian levels. Most of the hygienic radon equivalent equilibrium volume activity standards exceedances were registered in mountain and foothill areas buildings. A number of radon anomalies is revealed also in steppe areas. Med exceedances ranged from 203 ± 17.8 Bq / m3 to 480 ± 37.9 Bq / m3. Given the fact that most of these buildings belong to the administrative or educational institutions with an eight-hour working day, the dose of radiation for people there can be up to 10 mSv / year. Conclusion. Spreading of individual annual effective dose of the Altai Territory population showed that five regions of the model areas are converted into three main groups depending on the natural radiation dose due primarily radon equivalent equilibrium volume activity and depends mostly on the eco-geographical terrain type.Целью работы является определение закономерностей облучения населения модельных территорий Алтайского края от природных источников ионизирующего излучения.Материалы и методы. Было выполнено 11 376 измерений радона, 1247 измерений гамма-излучения на открытой местности, в жилых и административных зданиях, осуществлялся отбор 189 проб питьевой воды. Результаты. Проведено комплексное радиационно-гигиеническое обследование региона с самым большим количеством муниципальных образований с выделением модельных территорий. Оценка индивидуальных годовых доз облучения населения Алтайского края от природных радионуклидов выявила ряд закономерностей, зависящих от эколого-географического типа местности. По итогам исследования проведено ранжирование территорий региона с учетом годовых эффективных доз облучения населения от природных источников за 2009–2015 гг. Годовая индивидуальная эффективная доза населения нагорных областей Алтайского края представлена наибольшими значениями и изменяется в пределах от 7,36 мЗв/год до 8,19 мЗв/год. Предгорные районы Алтая и территории в области Салаирского кряжа характеризуются повышенным облучением населения от природных источников, здесь дозы составляют от 5,09 до 6,22 мЗв/ год. Степные и лесостепные территории характеризуются наименьшим уровнем природного облучения, находящегося в пределах от 3,23 до 4,11 мЗв/год, что не превышает общероссийские уровни. Большая часть превышений гигиенических нормативов ЭРОА радона регистрировалась в зданиях горных и предгорных областей, ряд радоновых аномалий выявлен и в степных районах. Медианы превышений изменялись в пределах от 203±17,8 до 480±37,9 Бк/м3. С учетом того, что большинство таких зданий относятся к административным или образовательным учреждениям с восьмичасовым рабочим днем, доза облучения находящихся там людей может составлять до 10 мЗв/год.Заключение. Распределение индивидуальных годовых эффективных доз населения Алтайского края показало, что районы пяти модельных территорий преобразуются в три основных группы в зависимости от доз природного облучения, обусловленного в первую очередь ЭРОА радона и зависящего в большей степени от эколого-географического типа местности

Annual individual hygienic assessment of natural exposure doses of the Altai territory model areas population

The goal is to determine ionizing radiation natural sources exposure regularities of Altai Territory model areas population. The materials and methods. 11376 radon measurements, 1247 gamma radiation meas-urements in an open area and in residential and office buildings were performed, selection of 189 drinking water tests was carried out. Results. Complex radiation and hygienic examination of the region with the most large municipalities number with model areas allocation was conducted. The assessment of the Altai Territory population’s individual annual radiation doses from natural radionuclides has revealed a number of the regularities depending on the terrain’s ecological and geographical type. Following the research results, ranging the region territories taking into account of annual effective doses of the population from natural sources for 2009-2015 was carried out. The annual individual effective dose of the Altai Territory upland areas population presented by the highest values and ranges from 7.36 mSv / year to 8.19 mSv / year. Foothill regions of Altai and in Salair ridge are characterized by increased population exposure from natural sources. Here the dose ranges from 5.09 mSv / year to 6.22 mSv / year. Steppe and forest-steppe territories are characterized by the lowest level of the natural radiation which is ranging from 3.23 mSv / year to 4.11 mSv / year, that doesn’t exceed the all-Russian levels. Most of the hygienic radon equivalent equilibrium volume activity standards exceedances were registered in mountain and foothill areas buildings. A number of radon anomalies is revealed also in steppe areas. Med exceedances ranged from 203 ± 17.8 Bq / m3 to 480 ± 37.9 Bq / m3. Given the fact that most of these buildings belong to the administrative or educational institutions with an eight-hour working day, the dose of radiation for people there can be up to 10 mSv / year. Conclusion. Spreading of individual annual effective dose of the Altai Territory population showed that five regions of the model areas are converted into three main groups depending on the natural radiation dose due primarily radon equivalent equilibrium volume activity and depends mostly on the eco-geographical terrain type