scholarly journals INTEGRATION OF GAMMA-RAY SPECTROMETRIC AND ASTER DATA FOR URANIUM EXPLORATION IN QASH AMER-EL-SELA AREA, SOUTHEASTERN DESERT, EGYPT

2017 ◽  
Vol 6 (1) ◽  
pp. 17-33 ◽  
Author(s):  
IBRAHIM GAAFAR ◽  
HATEM ABOELKHAIR ◽  
MOSTAFA BAYOUMI
Keyword(s):  
Gamma Ray ◽  
Aster Data ◽  
Southeastern Desert ◽  
Uranium Exploration

Deconvolving gamma-ray logs by adaptive zone refinement

Geophysics ◽  
2012 ◽  
Vol 77 (4) ◽  
pp. D159-D169 ◽  
Author(s):  
B. Dickson ◽  
M. Craig
Keyword(s):  
Gamma Ray ◽  
High Grade ◽  
Space Domain ◽  
Uranium Ore ◽  
Uranium Exploration ◽  
The Usa ◽  
Very High ◽  
Ore Grade ◽  
Adaptive Zone

Uranium exploration and mining make widespread use of gamma-ray logs to determine ore-grade distribution in situ. Attenuation, scattering, and uncollimated detectors all degrade the signal, hampering accuracy. We deconvolve their effects from the measured logs by space-domain processing with the aid of a function that takes account of detector length and uranium ore-zone thickness. The output quantifies uranium grade by zones of specified location and thickness. With this method, thin zones of very high grade can be used for calibration. Illustrative data come from model pits in Australia, Canada, and the USA.

scholarly journals Spectral gamma ray logging: A cost-effective method for uranium exploration

2018 ◽  
Vol 41 (1) ◽  
pp. 42
Author(s):  
G Jegannathan ◽  
V Veluswamy ◽  
BRam Mohan Reddy ◽  
PravinKumar Sharma
Keyword(s):  
Gamma Ray ◽  
Cost Effective ◽  
Cost Effective Method ◽  
Uranium Exploration

scholarly journals Radiometric Surveys for Detection of Uranium in Dhofar Region, Sultanate of Oman

2019 ◽  
Vol 24 (1) ◽  
pp. 36
Author(s):  
Narasimman Sundararajan ◽  
Bernhard Pracejus ◽  
Salah Al- Khirbash ◽  
Talal Al-Hosni ◽  
Ala Ebrahimi Ebrahimi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Radioactive Decay ◽  
Sampling Interval ◽  
Uranium Mineralization ◽  
Gamma Ray Spectrometry ◽  
Sultanate Of Oman ◽  
Near Surface ◽  
The World ◽  
Uranium Exploration ◽  
Proterozoic Basement

The Proterozoic basement of the Dhofar region of the Sultanate of Oman might be considered as a potential source of Uranium mineralization like other Proterozoic basins of the world, which collectively contribute 30%-40% to the global production.  Uranium exploration assumes great importance in this part of the world and therefore geochemical and geophysical exploration for Uranium was initiated.  Initial, random sampling of the study area with Gamma ray spectrometry as well as in situ XRF (Xray Florescence) analysis indicated the presence of   around 30-40 ppm of Uranium. Since Gamma ray spectrometry results in the calculation of the heat produced during radioactive decay of Potassium (K), Uranium (U) and Thorium (Th) within the rocks in the study area, measurements were acquired along eleven traverses of varying length from 100-250 m at a traverse interval of 20 m and sampling interval of 10 m. Individual plots of the concentrations  of radioelements such as U, K and Th have shown favorable anomalous radioactive sources. Besides this, Uranium to Thorium (eU/eTh) and Uranium to Potassium (eU/K) ratio plots have been presented and the alteration zones associated with Uranium mineralization through all traverses have been identified. Further, the generated composite ternary image based on the combination of K, Th and U from Gamma ray spectrometry determines different relative amounts of radioelements and paves the way for deciphering the level of radioactivity in the study area. However, there seems to be no presence of strong Uranium anomalies in the near surface of the limited study area. As the study area is heavily faulted, the depth to concealed  subsurface fault structures  is  estimated to be around  64 m based on Hartley spectral analysis of total magnetic anomaly (line-6). 

scholarly journals Application of geostatistics to complete uranium resources estimation of Rabau Hulu Sector, Kalan, West Kalimantan

2020 ◽  
Vol 200 ◽  
pp. 06001
Author(s):  
Roni Ciputra ◽  
Suharji Suharji ◽  
Dhatu Kamajati ◽  
Heri Syaeful
Keyword(s):  
3D Modeling ◽  
Gamma Ray ◽  
Block Size ◽  
Mine Planning ◽  
Resource Estimation ◽  
Block Model ◽  
West Kalimantan ◽  
Geostatistical Estimation ◽  
Uranium Exploration ◽  
Minimum Block

Kalan is one of the focus areas for uranium exploration in West Borneo that conducted by BATAN. Situated in the central part of Kalan, previous works in Rabau Hulu Sector consisted of surface geology and radiometric anomaly mapping, trenching, drilling, logging, and conventional uranium resource estimation. Nevertheless, the complete resource estimation of the previous work was still using 2D modeling, and the latest one using 3D modeling is a method-application case study in one orebody. To increase the confidence level and completing the uranium resource estimation of all orebodies in this sector, a geostatistical estimation with 3D orebody modeling using SURPAC mine planning software was conducted in this paper. Gamma-ray log data from 32 drill holes were collected and then interpreted to obtain uranium grade-thickness data. Based on the correlation of grade-thickness data according to surface orebody orientation, the orebody 3D modeling was done. It resulted in 26 orebodies with one control system of lithology as the mineralization only taken place in the quartzite unit. This 3D model then used as a constraint for block model with 4x4x2 m block size and 0.25x0.25x0.125 m minimum block size. Block model calculation was performed using ordinary kriging which generated the kriging efficiency attribute for the determination of the resource category. Within 25 meters searching radius, the calculation resulted in 408, 480 tons of ore, while total uranium resource was 268 tons of uranium with 677 ppm average grade. There were 214 tons of uranium (79%) categorized as measured while the other 54 tons of uranium (21%) categorized as indicated.

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