In situ gamma radiation measurements in the Neoproterozoic rocks of Sirohi region, NW India

Journal article


Publication Details

Author(s): Scharfenberg L, de Wall H, Schöbel S, Minor A, Maurer M, Pandit MK, Sharma KK
Journal: Journal of Earth System Science
Publisher: INDIAN ACAD SCIENCES
Publication year: 2015
Volume: 124
Journal issue: 6
Pages range: 1223-1234
ISSN: 0253-4126
eISSN: 0253-2143


Abstract


Natural gamma ray measurements using a portable device were performed at 157 sites in the area around Sirohi town and Sindreth village in Rajasthan (NW India). This region comprises sedimentary rocks, metasediments, granites and gneisses that bear characteristic GR dose values and U/Th ratios corresponding with their specific geological history. A-type Malani granites and rhyolitic derivates, also referred as high heat production granites, show distinct differences as compared to the S-type Erinpura and Balda granites, most prominent in a high Th content of the former (up to 90 ppm). Sedimentary rocks in the Sirohi and Sindreth area are variable in their signatures reflecting their variable source rocks. In the area between the Balda and Paladi villages, northeast of Sirohi, measurements in vicinity of a N-S running shear zone, have shown U enrichment up to 8 ppm. This shear zone has been synkinematically mineralized with quartz and shows evidence of fluid infiltration into the host rocks in the vicinity of the shear zone. Erinpura granites have been altered due to fluid activity and show a light depletion of K (3.96%) and Th (20.11 ppm) as compared to the unaltered rocks (K, 4.06; Th 24.46 ppm). Enrichment of U (with a mean value of 13 ppm) has also been recorded in the lower clastic unit of the Sindreth Basin, especially within gritty conglomerates wherein migration and precipitation along fault planes is proposed.



FAU Authors / FAU Editors

de Wall, Helga Prof. Dr.
Professur für Geologie unter besonderer Berücksichtigung der Strukturgeologie [Tektonik] und Photogeologie
Minor, Alexander
Professur für Geologie unter besonderer Berücksichtigung der Strukturgeologie [Tektonik] und Photogeologie
Scharfenberg, Lars
Professur für Geologie unter besonderer Berücksichtigung der Strukturgeologie [Tektonik] und Photogeologie
Schöbel, Stefan
Professur für Geologie unter besonderer Berücksichtigung der Strukturgeologie [Tektonik] und Photogeologie


External institutions
Mohanlal Sukhadia University / University of Udaipur
University of Rajasthan


How to cite

APA:
Scharfenberg, L., de Wall, H., Schöbel, S., Minor, A., Maurer, M., Pandit, M.K., & Sharma, K.K. (2015). In situ gamma radiation measurements in the Neoproterozoic rocks of Sirohi region, NW India. Journal of Earth System Science, 124(6), 1223-1234. https://dx.doi.org/10.1007/s12040-015-0601-x

MLA:
Scharfenberg, Lars, et al. "In situ gamma radiation measurements in the Neoproterozoic rocks of Sirohi region, NW India." Journal of Earth System Science 124.6 (2015): 1223-1234.

BibTeX: 

Last updated on 2018-11-08 at 00:30