Research output: Contribution to journal › Conference article › peer-review
Geochemistry of brines in Vendian deposits of the Siberian platform. / Novikov, D. A.; Chernykh, A. V.; Dultsev, F. F.
In: IOP Conference Series: Earth and Environmental Science, Vol. 193, No. 1, 012052, 30.10.2018.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Geochemistry of brines in Vendian deposits of the Siberian platform
AU - Novikov, D. A.
AU - Chernykh, A. V.
AU - Dultsev, F. F.
PY - 2018/10/30
Y1 - 2018/10/30
N2 - Results of the geochemical studies on natural brines from regional Vendian reservoirs (Lower-Danilov, Tira, Nepa and Vilyuchan) of the Siberian platform are presented. TDS values of the studied groundwaters and brines range from 17.3 to 583.1 g/dm3, where brines with salinity 280 - 400 g/dm3 are predominant. Brines identified within the Ayan, Bratsk, Balaganka, Upper Chona, Shamanka and other areas, have the highest TDS values.The most widely spread brines belong to five chemical types of Cl Na to Cl Ca composition. TDS concentrations vary widely from 197 to 580 g/dm3 in the Lower Danilov and Tira horizons, and from 170 to 470 g/dm3 in the lower-sitting Nepa and Vilyuchan horizons. Na Cl brines whose TDS concentration reaches the halite precipitation phase should be assigned to infiltration-formed brines on account of salt rock leaching, while strongly metamorphosed brines (S > 300) mostly of Cl and Ca Cl Ca-Mg composition - to sedimentogenic type accounting for those descended from Cambrian salt-bearing deposits, thereby largely explaining the phenomenon of inverse hydrogeochemical zonality in subsalt horizons. The third genetic type, of Cl Ca-Na composition, is rooted in the processes of mixing sodium and calcium types of brines.
AB - Results of the geochemical studies on natural brines from regional Vendian reservoirs (Lower-Danilov, Tira, Nepa and Vilyuchan) of the Siberian platform are presented. TDS values of the studied groundwaters and brines range from 17.3 to 583.1 g/dm3, where brines with salinity 280 - 400 g/dm3 are predominant. Brines identified within the Ayan, Bratsk, Balaganka, Upper Chona, Shamanka and other areas, have the highest TDS values.The most widely spread brines belong to five chemical types of Cl Na to Cl Ca composition. TDS concentrations vary widely from 197 to 580 g/dm3 in the Lower Danilov and Tira horizons, and from 170 to 470 g/dm3 in the lower-sitting Nepa and Vilyuchan horizons. Na Cl brines whose TDS concentration reaches the halite precipitation phase should be assigned to infiltration-formed brines on account of salt rock leaching, while strongly metamorphosed brines (S > 300) mostly of Cl and Ca Cl Ca-Mg composition - to sedimentogenic type accounting for those descended from Cambrian salt-bearing deposits, thereby largely explaining the phenomenon of inverse hydrogeochemical zonality in subsalt horizons. The third genetic type, of Cl Ca-Na composition, is rooted in the processes of mixing sodium and calcium types of brines.
KW - BASIN
UR - http://www.scopus.com/inward/record.url?scp=85056481186&partnerID=8YFLogxK
U2 - 10.1088/1755-1315/193/1/012052
DO - 10.1088/1755-1315/193/1/012052
M3 - Conference article
AN - SCOPUS:85056481186
VL - 193
JO - IOP Conference Series: Earth and Environmental Science
JF - IOP Conference Series: Earth and Environmental Science
SN - 1755-1307
IS - 1
M1 - 012052
T2 - 5th All-Russian Conference with International Participation on Polar Mechanics 2018
Y2 - 9 October 2018 through 11 October 2018
ER -
ID: 17486734