نتایج جستجو برای: amphibole
تعداد نتایج: 1087 فیلتر نتایج به سال:
Amphibole (Amp) plays a crucial role in the study of several earth and planetary processes. One its most common applications is thermobarometry, especially for volcanic-magmatic systems. However, many thermobarometers require input melt composition, which not always available volcanic products (e.g., partially crystallized melts or devitrified glasses), show rather high errors characterizing de...
This study investigated the applicability of an HY-differential mobility analyzer with an optical particle counter (HY-DMA/OPC), named as KOFAM, for counting fibrous matters in real time. Fibers separated from particles by the HY-DMA were counted with an OPC. To assess the KOFAM performance, the proposed method and the conventional gold standard phase contrast microscopy (PCM) method were compa...
This Article discusses the current posture of “take-home” asbestos litigation and distinguishes the lack of merit of such cases from previous “take-home” asbestos cases. It further identifies sources other than asbestos that commonly cause mesothelioma that lead to “take-home” litigation. Moreover, this Article articulates the issues with the any exposure causation theory typically used by expe...
This paper empirically studies U.S. and Canadian asbestos mining firms’ divestment process when the asbestos industry faced a long-run decline in demand. I develop a dynamic oligopoly model of capacity adjustment and exit based on Ericson and Pakes (1995). I calibrate my model to a panel data of the U.S. and Canadian asbestos mining industry’s capacities and exit/stay status over 1968-2002, and...
Rare earth and trace element concentrations of mineral assemblages including amphibole, plagioclase, epidote group minerals (zoisite and clinozoisite) and relict clinopyroxenes from parental rock of epidote amphibolite from north of Urumia were obtained in situ by LA-ICP-MS analysis. The obtained data were used to study distribution of trace elements among metamorphic phases and relict clinopyr...
All samples of Shanderman eclogites contain amphibole. Epidote group minerals and chlorite formed during retrograde phases of metamorphism. Amphiboles show zoning with high FeO and Al2O3 content at the rims and high MgO in the cores in some samples. In these samples, the amphibole compositions vary from tremolitic hornblende to tschermakite and edenitic hornblende from core to rim, respectively...
Abstract We present microbeam major- and trace-element data from 14 monzodiorites collected the Malaspina Pluton (Fiordland, New Zealand) with goal of evaluating processes involved in production andesites lower arc crust. focus on relict igneous assemblages consisting plagioclase amphibole lesser amounts clinopyroxene, orthopyroxene, biotite quartz. These are heterogeneously preserved crust wit...
The Piquiri Syenite Massif, southernmost Brazil, is part of the post-collisional magmatism related to the Neoproterozoic Brasiliano-Pan-African Orogenic Cycle. The massif is about 12 km in diameter and is composed of syenites, granites, monzonitic rocks and lamprophyres. Diopside-phlogopite, diopside-biotite-augite-calcic-amphibole, are the main ferro-magnesian paragenesis in the syenitic rocks...
Fibrous tremolite is a mineral species belonging to the amphibole group. It is present almost everywhere in the world as a natural contaminant of other minerals, like talc and vermiculite. It can be also found as a natural contaminant of the chrysotile form of asbestos. Tremolite asbestos exposures result in respiratory health consequences similar to the other forms of asbestos exposure, includ...
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