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Pegmatite veins are common in almost all the rock type in Ranchi city of India. by Dr. Nitish Priyadarshi Pegmatite, meaning “joined together,” was first applied to graphic granite sometime before 1822. Subsequently, it has been extended to refer to any abnormally coarse grained rock of overall igneous character. The term “pegmatite” was first used by a French mineralogist René Haüy but he used this term as a synonym of graphic granite. Contemporary meaning was given to the rock type in 1845 by an Austrian mineralogist Wilhelm Heidinger. Most of pegmatites are more than 1 centimeter across; grains up to a meter or two across are relatively common; and individual crystals up to several meters in greatest dimension have been reported. In any case, no matter how large the grains, most pegmatites have typical igneous rock textures. Pegmatites are associated with plutonic or intrusive rocks and were evidently formed by slow crystallization at considerable depths below the surface. Individ...

There have also been a number of reports of the presence of dissolved radon in groundwater from India. by Dr. Nitish Priyadarshi Presence of high levels of Radon (222 Rn) has been reported from groundwater in Bangalore city, Keolari-Nainpur area, Seoni-Mandla district in Madhya Pradesh, Bathinda , Gurdaspur, Garhwal, Himachal Pradesh and Siwalik Himalayas and underground waters of the Doon valley in India. To ascertain the ground reality and the nature of the hazards, if any, a study was conducted by the Central Ground Water Board, Bangalore in and around Bangalore city. The analytical results of all the groundwater samples collected from the gneissic and granitic rocks shows Radon concentration is above the permissible limit of 11.83 Bq/l and at places the concentration is as high as hundred times. The radon gas is occurring in the groundwater of the area ranging from 55.96 Bq/l to 1189.30 Bq/l plus or minus error values. There is no relation between the radon concentration and the de...

Plants can also help us in finding uranium. by Dr. Nitish Priyadarshi Fig. Aster Venusta Name of the plant in the figure below is Astraqualus sp. Geobotanical methods of prospecting involve the use of vegetation for identification of the nature and properties of the substrate. Paradoxically, these methods are among the easiest to execute and yet the most difficult to interpret of all the methods of exploration available at the present time. In terms of execution, the basic requirement is merely a pair of human eyes; but in the interpretation of the visual (or photographic) image, some knowledge is required of a number of different disciplines such as biochemistry, botany, chemistry, ecology, geology, and plant physiology. Geobotanical methods of prospecting are based on the visual observation and identification of vegetation or plant cover that may reveal the presence of a specific type of sub-surface mineralization. In this method, it is presumed that a particular variety of plant s...

Jharkhand coal contains trace amount of Uranium in North Karanpura coal field. by Dr. Nitish Priyadarshi Coal is largely composed of organic matter, but it is the inorganic matter in coal—minerals and trace elements— that have been cited as possible causes of health, environmental, and technological problems associated with the use of coal. Some trace elements in coal are naturally radioactive. These radioactive elements include uranium (U), thorium (Th), and their numerous decay products, including radium (Ra) and radon (Rn). Although these elements are less chemically toxic than other coal constituents such as arsenic, selenium, or mercury, questions have been raised concerning possible risk from radiation. Uranium association with coal has a long history. There is a continuing interest in uranium in coal, because it is a source of radioactivity and because it may be an economic source of uranium. It is just 200 years since the discovery of uranium by M.H. Klaproth. The first detecti...

Cases of missing radioactive metals were also reported from Jharkhand State of India. by Dr. Nitish Priyadarshi A radiation leak in a west Delhi industrial area triggered panic in New Delhi after a scrap dealer and his three employees suffered burn injuries and fell unconscious after coming in contact with a mysterious shining object on Wednesday. Scientists from the crisis management group of the Department of Atomic Energy and the Atomic Energy Regulation Board on Friday carried out a survey of the extent of radiation in West Delhi's Mayapuri industrial area. DAE sources said thorough investigations were being carried out to determine how much the radiation has spread and all other aspects of the incident including how it started. Scientist believe that the radioactive object is Cobalt-60. The Bhabha Atomic Research Centre has also rushed a team of scientists to Delhi to ascertain the extent of the leak. From where did this radioactive metals came into the shop? All these radioac...

It is now a globally emerging discipline. by Dr. Nitish Priyadarshi Humans live in lands. Most of them live in intimate contact with the immediate geological environment, obtaining their food and water directly from it. The unique geochemistry of these tropical environments have a marked influence on their health, giving rise to diseases that affect millions of people. The origin of these diseases is geologic as exemplified by dental and skeletal fluorosis, iodine deficiency disorders, trace element imbalances to name a few. Medical Geology is an emerging scientific discipline that examines the impacts that geologic materials and processes have on human and ecosystem health. Medical Geology: · Identifies and characterizes natural and anthropogenic sources of harmful materials in the environment. · Predicts the movement and alteration of chemical, infectious, and other disease-causing agents over time and space. · Provides an understanding of how people are exp...