Clastic Sedimentary Rocks and Sedimentary Mélanges: Potential Naturally Occurring Asbestos Occurrences (Amphibole and Serpentine)

2020 ◽  
Vol 26 (1) ◽  
pp. 15-19
Author(s):  
John Wakabayashi
Keyword(s):  
Sedimentary Rocks ◽  
Blue Color ◽  
Franciscan Complex ◽  
Naturally Occurring ◽  
Sodic Amphibole ◽  
The World ◽  
Naturally Occurring Asbestos ◽  
Clastic Sedimentary ◽  
Hand Specimen

ABSTRACT Petrography of mélange matrix and clastic sedimentary rocks in coastal California reveals the occurrence of detrital serpentine and detrital asbestiform sodic amphibole (glaucophane). Many sandstones of the Franciscan Complex have small amounts of detrital serpentine, with amounts of up to several percent in some cases. Detrital amphibole, including asbestiform glaucophane, is also present in some sandstones. Whereas rare sandstones have so much detrital glaucophane that they appear blue in hand specimen (up to nearly half of the rock volume), most glaucophane-bearing sandstones lack blue color, and the detrital glaucophane is not apparent in hand specimen. Most of the occurrences of detrital glaucophane are in blueschist facies sandstones, some of which also contain neoblastic (grew in place) glaucophane, but a notable exception is a widespread prehnite-pumpellyite facies unit that crops out primarily in Sonoma and Marin Counties. The detrital mineralogy of sandstones mirrors the block and matrix compositions of Franciscan mélanges that can be thought of as scaled-up equivalents of these clastic sedimentary rocks (mega-conglomerates/sedimentary breccias). Franciscan mélanges range from having a detrital siliciclastic to a detrital serpentinite matrix, and interfingering and gradation of the two matrix types is common. These findings suggest that clastic sedimentary rocks associated with current or past active orogenic settings else-where in the world may contain naturally occurring asbestos (NOA) even if the NOA component minerals are not visible in hand specimen.

A Comparison of Environmental Concerns in Two Disparate Montana and Nevada Communities

2019 ◽  
Vol 38 (1) ◽  
pp. 113-130
Author(s):  
Charlene A. Winters ◽  
Sandra W. Kuntz
Keyword(s):  
United States ◽  
Best Practices ◽  
The United States ◽  
Environmental Concerns ◽  
Primary Concern ◽  
Exposure Risk ◽  
Naturally Occurring ◽  
Fibrous Minerals ◽  
The World ◽  
Naturally Occurring Asbestos

Asbestos refers to six fibrous minerals that occur naturally in the environment in the United States and throughout the world. Deposits may be found in soil, rocks, and deposits of other minerals such as vermiculite and talc. These naturally occurring asbestos (NOA) minerals belong to the serpentine and amphibole family of minerals. This chapter reports shared components of community-driven environmental concerns related to exposure to NOA in a rural Montana and a suburban Nevada community. The specific aim is to establish an understanding of the community and community member's primary concern(s) related to NOA in both communities. The knowledge that NOA is commonly found in areas across the United States supports the need for additional research into the health effects of environmental exposure and best-practices to reduce exposure risk while allowing communities to thrive economically.

Impacts of land use on spatial distribution of mortality rates of cancers caused by naturally occurring asbestos

2012 ◽  
Vol 22 (5) ◽  
pp. 516-521 ◽  
Author(s):  
Binggan Wei ◽  
Xianjie Jia ◽  
Bixiong Ye ◽  
Jiangping Yu ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Mortality Rates ◽  
Naturally Occurring ◽  
Naturally Occurring Asbestos

SACRED CONCEPTS CONCERNING COWS IN KAZAKH FOLKLORE

Keruen ◽  
2020 ◽  
Vol 67 (2) ◽  
Author(s):  
N. Nabiolla ◽  
Keyword(s):  
Special Property ◽  
Blue Color ◽  
The Earth ◽  
Cargo Transport ◽  
The World ◽  
Ancient Times ◽  
Food Animals ◽  
Nomadic Life

From ancient times our people, who grazed four food animals, believed that they had an owner. The owners of the four food animals were considered to be their "ancestors" or "peers". That is why he gave them a mythical character. He leaned on his holy ancestors and asked them to help him. He wished them well and wished them well. He thought that only then he could have cattle. That is why various rituals and ceremonies have come to everyone. Currently in the country spread a lot of myths, indicating that the cow was the cow skorlupok animal. Special attention was paid to cattle, including bull. Even the purpose of the human earth that applies to spelled. He was known in myths as the blue bull, sometimes the blue bull, which was known in folklore with special vividness. This is mostly associated with myths about the injury of the earth. In the mythology of the peoples of the world say that the earth put on, fish, elephant (for the concept of the ancient Indians), snake Cotes, the myth, widespread among the peoples of Turkic origin, including among Kazakh people put on the surface of the blue ox, and sometimes on a blue bull to pick it up. He draws attention to the myths of the bull or bull and one case depends on the blue bull. In General, the blue color has a special property, for example, "blue Bor", "blue bull", etc. "Blue" is formed from mythical concepts: " blue sky","bull of the blue God". In this regard, it should be noted that in nomadic life, it became the first cargo transport.

Factors dominating deterioration of clastic sedimentary rocks

2011 ◽  
pp. 939-944
Author(s):  
P Chan ◽  
S Lyu ◽  
T Wang ◽  
F Jeng ◽  
T Ueng
Keyword(s):  
Sedimentary Rocks ◽  
Clastic Sedimentary

scholarly journals FITOPLANKTON DAN SIKLUS KARBON GLOBAL

OSEANA ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 35-48
Author(s):  
Mochamad Ramdhan Firdaus ◽  
Lady Ayu Sri Wijayanti
Keyword(s):  
Carbon Cycle ◽  
Primary Productivity ◽  
Net Primary Productivity ◽  
Sedimentary Rocks ◽  
Global Carbon Cycle ◽  
Biological Pump ◽  
Large Role ◽  
The World ◽  
Pump Mechanism ◽  
Global Carbon

PHYTOPLANKTON AND GLOBAL CARBON CYCLE. Scientists around the world believe that phytoplankton, although microscopic, have a large role in the global carbon cycle. Various research results show that the net primary productivity of all phytoplankton in the sea is almost as large as the net primary productivity of all plants on land. Phytoplankton through the process of photosynthesis absorbs 40-50 PgC / year from the atmosphere. Also, phytoplankton is known to be responsible for transporting carbon from the atmosphere to the seafloor through the carbon biological pump mechanism. Phytoplankton from the coccolithophores group is known to play a role in the sequestration of carbon on the seabed through the carbonate pump mechanism. The mechanism is capable of sequestering carbon for thousands of years on the seabed in the form of sedimentary rocks (limestone).

scholarly journals Impact of Naturally Occurring Asbestos on Asbestos Ban: Regulations and Experience of the Republic of Korea

2022 ◽  
Vol 19 (2) ◽  
pp. 742
Author(s):  
Jiwoon Kwon
Keyword(s):  
Preventive Measures ◽  
Control Measures ◽  
Exposure Risk ◽  
Close Collaboration ◽  
Mineral Particles ◽  
Naturally Occurring ◽  
Transmission Electron ◽  
The Future ◽  
Naturally Occurring Asbestos ◽  
The Republic

This review examined the main issues debated in Korea regarding the production and use of materials containing naturally occurring asbestos (NOA) as impurities, and investigated the impacts of these debates on the asbestos ban, as well as the future implications. In Korea, incidents associated with the production and use of NOA-contaminated talc powders, construction rocks, serpentinites, and dolomite rocks raised public concern and led to accelerating the ban on asbestos. The main controversies concern policies on appropriate asbestos content limits, whether materials containing a trace amount of NOA should be banned, and the control of materials with high human exposure risk. To address recurring controversies, the implementation of preventive measures to manage elongated mineral particles and the use of transmission electron microscopy for more sensitive analysis need to be discussed, along with reaching social agreement on the controversial policies. To minimize the potential exposure to asbestos that may occur during the production and use of industrial minerals in the future, it is necessary to apply occupational exposure control measures and monitor the health effects of the relevant population groups. These national policies on NOA should be prepared based on close collaboration and discussion with policymakers, industry stakeholders, and related academic experts.

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