Discrete geochemical behavior of Sr and Ba in the groundwater of Southern Mor Range, Balochistan, a tracer for igneous and sedimentary rocks weathering and related environmental issues

2021 ◽  
pp. 104996
Author(s):  
Maria Kaleem ◽  
Shahid Naseem ◽  
Erum Bashir ◽  
Bushra Shahab ◽  
Tahir Rafique
Keyword(s):  
Sedimentary Rocks ◽  
Environmental Issues ◽  
Geochemical Behavior

scholarly journals Gradation and geochemistry of the Fenced Lagoon sediments (Bandar Anzali) with regard to source rock and tectonic location

2020 ◽  
Vol 29 (1) ◽  
pp. 154-165
Author(s):  
Behnaz Rafiei Moghadam ◽  
Khalil Rezaei ◽  
Ali Solgi ◽  
Pantea Ghiahchi ◽  
Mohsen AleAli
Keyword(s):  
Source Rock ◽  
Active Continental Margin ◽  
Sedimentary Rocks ◽  
Environmental Issues ◽  
Muddy Sand ◽  
Geochemical Properties ◽  
The People ◽  
Lagoon Sediments ◽  
Main Component ◽  
Coastal River

The location of the Fenced Lagoon in the urban basin of Bandar Anzali, which should be considered due to its impact on the lives of the people of the region in terms of the conservation of the wetland and its environmental issues, and, on the other hand, the potential of this area to be introduced as a geotourism center determine the need to investigate the area’s sedimentology and geochemistry. Therefore, to study sedimentary and geochemical properties of the Fenced Lagoon sediments located in Bandar Anzali, 33 samples were taken in the form of 6 cores and 12 grabs, and basic sedimentation tests and heavy metals measurement were carried out on them .Studies show that the sediments range from sand to clay in terms of gradation and have mainly coastal-river origin. The sediments of this lake are classified into four sedimentary types: Muddy Sand, Slightly Gravelly Muddy Sand, Sand and Slightly Gravelly Sand, and sand is the main component of all of these sediments. The most abundant sedimentary types belong to Muddy Sand and Sand and the least abundant sedimentary types belong to Slightly Gravelly Muddy Sand and Slightly Gravely Sand. The nature of the source rock is derived from acidic to intermediate combination and in general, sedimentary rocks of the area under study are within the continental arch islands and, to a lesser extent, the active continental margin.

Directly Dating Sedimentary Rocks

2006 ◽  
Vol 12 ◽  
pp. 77-105 ◽  
Author(s):  
E. Troy Rasbury ◽  
Jennifer M. Cole
Keyword(s):  
Critical Evaluation ◽  
Sedimentary Rocks ◽  
Black Shales ◽  
Depositional Environments ◽  
Radiometric Dating ◽  
Geochemical Behavior ◽  
Sedimentary Deposits ◽  
Future Work ◽  
Isotope Systematics

This contribution seeks to provide a summary of radiometric dating techniques that are currently applicable to Phanerozoic sedimentary deposits and therefore relevant to paleontologists. First we overview the assumptions necessary for radiometric dating and introduce isochrons and concordia diagrams as methods for calculating ages and evaluating isotope systematics. We then focus on the four most promising systems: U-Pb dating of carbonates, Re-Os dating of black shales, and U-Pb and Lu-Hf dating of phosphates. We review expected geochemical behavior of daughter and parent isotopes in the context of both marine and terrestrial depositional environments. A critical evaluation of previously published ages and potential directions for future work are provided.

scholarly journals GRADATION AND GEOCHEMISTRY OF THE FENCED LAGOON SEDIMENTS (BANDAR ANZALI) WITH REGARD TOWARDS SOURCE ROCK AND TECTONIC LOCATION

2020 ◽  
pp. 28-35
Author(s):  
Behnaz Rafiei Moghadam ◽  
Khalil Rezaei ◽  
Ali Solgi ◽  
Pantea Ghiahchi ◽  
Mohsen AleAli
Keyword(s):  
Source Rock ◽  
Active Continental Margin ◽  
Sedimentary Rocks ◽  
Environmental Issues ◽  
The Other ◽  
Muddy Sand ◽  
Geochemical Properties ◽  
The People ◽  
Lagoon Sediments ◽  
Main Component

The location of the Fenced Lagoon in the urban basin of Bandar Anzali, which should be considered due to its impact on the lives of the people of the region in terms of the conservation of the wetland and its environmental issues, and, on the other hand, the potential of this area to be introduced as a geotourism center determine the need to investigate the area's sedimentology and geochemistry. Therefore, to study sedimentary and geochemical properties of the Fenced Lagoon sediments located in Bandar Anzali, 33 samples were taken in the form of 6 cores and 12 grabs, andbasic sedimentation tests and heavy metals measurement were carried out through XRF. Studies show that the sediments are ranged from sand to clay in terms of gradation and have mainly costal-river origin. The sediments of this lake are classified into four sedimentary types: Muddy Sand, Slightly Gravely Muddy Sand, Sand and Slightly Gravely Sand and sand is the main component of all of these sediments. The most abundant sedimentary types belong to Muddy Sand and Sand and the least abundant sedimentary types belong to Slightly Gravely Muddy Sand and Slightly Gravely Sand. The nature of the source rock is derived from acidic to intermediate combination and in general, sedimentary rocks of the area under study are within the continental arch islands and, to a lesser extent, the active continental margin.

Direct Observation of Crystalline Ordering In Naturally Graphitized Carbon Produced by Low Grade Metamorphism

1977 ◽  
Vol 35 ◽  
pp. 162-163
Author(s):  
Thomas R. McKee ◽  
Peter R. Buseck
Keyword(s):  
Crystallite Size ◽  
Sedimentary Rocks ◽  
Carbonaceous Material ◽  
Low Grade ◽  
X Ray ◽  
Graphitized Carbon ◽  
Transmission Electron ◽  
Heat Treated ◽  
Commercial Carbon ◽  
Metamorphic Zone

Sediments commonly contain organic material which appears as refractory carbonaceous material in metamorphosed sedimentary rocks. Grew and others have shown that relative carbon content, crystallite size, X-ray crystallinity and development of well-ordered graphite crystal structure of the carbonaceous material increases with increasing metamorphic grade. The graphitization process is irreversible and appears to be continous from the amorphous to the completely graphitized stage. The most dramatic chemical and crystallographic changes take place within the chlorite metamorphic zone.The detailed X-ray investigation of crystallite size and crystalline ordering is complex and can best be investigated by other means such as high resolution transmission electron microscopy (HRTEM). The natural graphitization series is similar to that for heat-treated commercial carbon blacks, which have been successfully studied by HRTEM (Ban and others).

Stabilizing pyritic material

1989 ◽  
Vol 4 ◽  
pp. 244-248 ◽  
Author(s):  
Donald L. Wolberg
Keyword(s):  
Significant Contribution ◽  
Organic Materials ◽  
Sedimentary Rocks ◽  
Iron Sulfides ◽  
Decomposition Products ◽  
Iron Minerals ◽  
Pyrite Formation ◽  
Organic Sediments ◽  
Freshwater Environments

The minerals pyrite and marcasite (broadly termed pyritic minerals) are iron sulfides that are common if not ubiquitous in sedimentary rocks, especially in association with organic materials (Berner, 1970). In most marine sedimentary associations, pyrite and marcasite are associated with organic sediments rich in dissolved sulfate and iron minerals. Because of the rapid consumption of sulfate in freshwater environments, however, pyrite formation is more restricted in nonmarine sediments (Berner, 1983). The origin of the sulfur in nonmarine environments must lie within pre-existing rocks or volcanic detritus; a relatively small, but significant contribution may derive from plant and animal decomposition products.

On visions and promises — ethical aspects of in vitro meat

2019 ◽  
Vol 3 (6) ◽  
pp. 753-758
Author(s):  
Silvia Woll
Keyword(s):  
Animal Welfare ◽  
Environmental Issues ◽  
Meat Production ◽  
Ethical Aspects ◽  
Existing Problems ◽  
In Vitro Meat ◽  
Production And Consumption ◽  
Production Conditions

Innovators of in vitro meat (IVM) are convinced that this approach is the solution for problems related to current meat production and consumption, especially regarding animal welfare and environmental issues. However, the production conditions have yet to be fully clarified and there is still a lack of ethical discourses and critical debates on IVM. In consequence, discussion about the ethical justifiability and desirability of IVM remains hypothetical and we have to question those promises. This paper addresses the complex ethical aspects associated with IVM and the questions of whether, and under what conditions, the production of IVM represents an ethically justifiable solution for existing problems, especially in view of animal welfare, the environment, and society. There are particular hopes regarding the benefits that IVM could bring to animal welfare and the environment, but there are also strong doubts about their ethical benefits.

The New Forest Suicide Prevention Initiative (NFSPI)

Crisis ◽  
2005 ◽  
Vol 26 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Elizabeth King ◽  
Neil Frost
Keyword(s):  
Environmental Issues ◽  
Exhaust Gas ◽  
Telephone Number ◽  
Forestry Commission ◽  
Car Exhaust ◽  
Gas Poisoning ◽  
Car Park ◽  
Annual Total ◽  
New Forest ◽  
Car Exhaust Gas

Abstract. A retrospective suicide study revealed that the Forestry Commission car parks in the New Forest in southern England were a previously unrecognized magnet for nonlocal suicides, attracting as high a proportion of “visitors” (35/43 in 1993-97) as among suicides who jumped from the cliffs at the infamous Beachy Head (39/48 in 1993-97). Over 95% of the car park suicides died from car exhaust gas poisoning. A multiagency initiative aimed to reduce the number of suicides in the 140 New Forest car parks where restricting access was impossible, and environmental issues paramount. Signs displaying the Samaritans' national telephone number were erected in the 26 car parks in which 50% of the car park suicides had occurred. Numbers, location, and residence of all car park deaths were monitored for 3 years. Corresponding changes in other forest registration districts were also monitored. During the 3-year intervention period the number of car park suicides fell significantly from 10/year, 1988-1997, to 3.3/year. The average annual total number of suicides in the New Forest registration district also decreased. No significant changes were found in comparable forest districts. The number of suicides in the New Forest car parks remained low during the 2 years following the evaluation.

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