Amphibole

Asbestos minerals are divided into two categories: Serpentine asbestos and amphibole asbestos. Serpentine asbestos refers to asbestos made up of long curly fibers. This category only has one mineral called chrysotile also known as white asbestos. It was the most known used form of asbestos. Its flexible nature allows it to be used in products and combined with other elements. It was used throughout the U.S. and all over the world finding its way into products that still are hazardez today. Amphibole asbestos includes the other five asbestos minerals: Amosite, crocidolite, tremolite, actinolite and anthophyllite. Also known as blue asbestos These minerals are brittle needle-shaped fibers. Because of these properties amphibole fibers are more hazardous when breathed in by a person. However the same characteristics make it a bad candidate for use in commercial…

WHAT IS ASBESTOS Asbestos is one of the six naturally occurring silicate minerals which have all in common the eponymous asbestiform habit. Asbestos has six primary sub-classifications; Chysotile, crocidolite,amosite, anthophyllite, tremolite, and actinolite. Among these, chyrsotile and amosite asbestos are most common. It existed more than 4,000 years ago but large scale mining began at the end of the late 19th century when manufacturers and builders begun using asbestos because of its…

the west went into removing and banning the material. Despite all this, asbestos is still used widely in some parts of the world. Russia, a country that is part of the United Nations and has access to evidence supporting the risks of cancer, is the world’s largest producer and supplies over half of the world’s asbestos. There are six sub-classification of asbestos: actinolite, amosite, anthophyllite, chrysolite, crocidolite, and tremolite. Asbestos, the commercial name given to these fibres. For…

Introduction Asbestos is a naturally occurring substance found in fibrous form. It is very resistant to heat and chemical erosions and it also has a very good tensile strength. As it is usually mixed with other materials to use, so it is very hard to recognize. But if you are working in a building made before 1990, some parts of it would contain asbestos. Asbestos was used widely in building materials such as to make fireproofing on walls and ceilings, floor tiles, cement pipes, cement boards…

grained facies. There is a gradational boundary present between these separate facies. The Liberty Hill has a total of three facies which differ both in minerology and texture. Internal igneous flow features on the granitoid suggest the three-dimensional shape to be a nearly circular asymmetric funnel which has steeper dips towards the northern side. The pluton has also been modeled using geophysical data. These models show a depth around 6 kilometers with a shallower portion along the…

There are two main types; 1]the localized mesothelioma{benign and malignant types} 2]the diffuse malignant mesothelioma Causes There is a strong correlation between asbestos exposure and the development of mesothelioma,although a history of exposure is not always obtainable in patients who have mesothelioma.There are 2 types of asbestos fibres based on crystalline structure;a-serpentine{chrysolite}and b-amphibole. Included within the amphibole are amosite,tremolte,crocidolite and…

pressure conditions, (Stevenson, 2005). Their composition ranges from felsic to intermediate, and are characterized by assemblages of plagioclase, and often amphibole, and are identified by their unique geochemical signatures. Adakite is named Adak Island, Alaska, where it was first documented,(Defant and Drummond, 1990). They are often formed through the partial melting of a young subducting slab of oceanic basalt, in the presence of garnet. While adakites can be formed under a variety…

Laurasia in the Iapetus ocean. There were areas of a shiny sugary appearance (Fig…) Manhattan Schist resulted when high heat and pressure transformed shale into quartz, feldspar, amphibole, hornblende and mica. The outcrop featured large garnets, anatexis was observed which shows two generations of garnets, pointing to the fact that there was differential or partial melting taking place (an indicator that it was an amphibolite facies). There was also evidence of a fault; the St. Nicolas fault…

and normally zoned (Murphy et al., 1999). Pyroxene is another main mineral found in the magma, specifically Orthopyroxene which occurs as individual phenocrysts and in crystal clots, as well as inclusions within amphibole (Murphy et al., 1999). There are three main phenocryst types that can be distinguished by the composition of their rims (Murphy et al., 1999). There are unzoned crystals that have narrow ranges in composition, reverse zoned crystals that have higher Enstatite and…

properties (Brandt 2008). The term asbestos comes from ancient Greek word meaning "inextinguishable". According to Hart (1988), the use of asbestos dates back to prehistoric times where asbestos fibers were woven into a fabric and used as wicks in oil lamps. Asbestos is a naturally occurring mineral which is mined from the earth’s crust. It belongs to a group of silicates which can be separated into two distinct groups which are serpentine asbestos and amphibole asbestos. (The Asbestos Institute…