Nandi Haerudin, NH (2020) PENILAIAN_The Correlation between Radon Emission Concentration and Subsurface Geological Condition. IOP Publishing. (Unpublished)

WarningThere is a more recent version of this item available.
[img] Text
9. PENILAIAN_THE CORRELATION BETWEEN RADON EMISSION CONCENTRATION AND SUBSURFACE GEOLOGICAL CONDITION.pdf

Download (673kB)

Abstract

Exploration activities with standard methods have already encountered many obstacles in the field. Geological survey is often difficult to find outcrop because they are covered by vegetation, alluvial layer or as a result of urban development and housing. Seismic method requires a large expense and licensing in the use of dynamite is complicated. Method of gravity requires the operator to go back (looping) to the starting point. Given some of these constraints, therefore it needs a solution in the form of new method that can work more efficiently with less cost. Several studies in various countries have shown a correlation between the presence of hydrocarbons and Radon gas concentration in the earth surface. By utilizing the properties of Radon that can migrate to the surface, the value of Radon concentration in the surface is suggested to provide information about the subsurface structure condition. Radon is the only radioactive substance that gas-phased at atmospheric temperature.It is very abundant in the earth mantle. The vast differences of temperatures and pressures between the mantle and the earth crust cause the convection flow toward earth surface. Radon in gas phase will be carried by convection flow to the surface. The quantity of convection currents depend on the porosity and permeability of rocks where Radon travels within, so that Radon concentration in the earth surface delineates the porosity and permeability of subsurface rock layers. Some measurements were carried out at several locations with various subsurface geological conditions, including proven oil fields, proven geothermal field, and frontier area as a comparison. These measurements show that the average and the background concentration threshold in the proven oil field (11,200 Bq/m3) and proven geothermal field (7,820 Bq/m3) is much higher than the quantity in frontier area (329 and 1,620 Bq/m3). Radon concentration in the earth surface is correlated with the presence of geological faults. Peak concentrations of Radon takes place along the fault

Item Type: Other
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Q Science > QE Geology
Divisions: Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User: NANDI HAERUDIN -
Date Deposited: 20 Feb 2020 01:45
Last Modified: 20 Feb 2020 01:45
URI: http://repository.lppm.unila.ac.id/id/eprint/18105

Available Versions of this Item

Actions (login required)

View Item View Item