نتایج جستجو برای: actinolite
تعداد نتایج: 166 فیلتر نتایج به سال:
Onzon-Kanbani area is a western flank of Mogok Metamorphic Belt where gold mineralization is hosted as auriferous quartz-vein with epithermal low-sulphidation characters. Mineralization is closely associated with NE-SW trending fracture or shear zone probably related to the dextral movement of the Sagaing Fault system. Mineralization related hydrothermal alteration is developed as narrow zones ...
Jalal-Abad iron deposit is located about 38 km northwest of Zarand town in Kerman Province. It contains 200 Mt iron ore with average chemical composition of Fe = 45%, S =1.18% and P = 0.08%. Iron mineralization occurs in an Early Cambrian volcano–sedimentary sequence of Rizu series which is composed of sandy siltstone, siltstone, volcanoclastic rocks and dolomite. Small intrusive bodies of gab...
Deformation measurements from 64 sandstone samples collected in three study areas from the Eastern Belt of the Franciscan Complex are used to evaluate how the high pressure metamorphic interior of the Franciscan wedge was exhumed. Pressure estimates indicate 25-30 km of exhumation in this part of the Franciscan Complex. Much of the Eastern Belt has a semi-penetrative cleavage that formed by so...
Introduction: Over the past year, tremoliteasbestos and vermiculite mining in Libby, Montana have gone from obscurity to the forefront of the national media. The Seattle Post-Intelligencer “broke” the story in November 1999 about the world’s largest vermiculite mine and the problems associated with its asbestos exposure. As the stories point out, several hundred miners, their families, and non-...
in 2007, research was carried out to determine the type and amount of asbestos fibers in a croatian factory with a long history of making asbestos-containing products.since the 1970s, asbestos fibres have been considered carcinogenic in humans i.e as a known cancer-causing agent. in the environment, asbestos fibres are inactive and naturally resist biodegradation. in time, fibres can only be gr...
Anomaly XVI-B located in Central Iran Structural Zone. The oldest rock formations in this study area are related to metamorphic rocks which are included gneiss, micaschist, amphibolite and megmatite. Mineralized intruded mass distinguished by alkaline diorite-syenite that cut Bonoshorow metamorphic complex and limestone units. Metallic mineralization is occurred in syenite, gabbro and skarn roc...
In 2007, research was carried out to determine the type and amount of asbestos fibers in a Croatian factory with a long history of making asbestos-containing products.Since the 1970s, asbestos fibres have been considered carcinogenic in humans i.e as a known cancer-causing agent. In the environment, asbestos fibres are inactive and naturally resist biodegradation. In time, fibres can only be gr...
introduction mineral composition is sensitive to variations in the composition of the magma and can be used to characterize the physical conditions of crystallization such as temperature, pressure, oxygen fugacity and water content. the studies have demonstrated that geobarometery by amphibole provides a tool for determining the depth of crystallization and knowledge of the depth of crystalliza...
First posted April 25, 2023 For additional information, contact: Director,California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, California 95819 Chromium concentrations in rock and aquifer material Hinkley Valleys the Mojave Desert, 80 miles northeast of Los Angeles, California, are generally low compared to average chromium concentration 185 milligrams per ...
| In Cappadocia, Turkey, an unprecedented mesothelioma epidemic causes 50% of all deaths in three small villages. Initially linked solely to the exposure to a fibrous mineral, erionite, recent studies by scientists from Turkey and the United States have shown that erionite causes mesothelioma mostly in families that are genetically predisposed to mineral fibre carcinogenesis. This manuscript re...
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