Geochemical attributes of late Neoproterozoic Salt Range Formation, Pakistan: constraints on provenance, paleoclimate, depositional and tectonic settings

Farooqui, Muhammad Ahmed; Umar, Muhammad; Sabir, Maimoona; Pervez, Rashid; Jalees, Tarib

doi:10.1007/s12303-018-0022-3

Cited by 7 publications

(1 citation statement)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Probably, in the late Neoproterozoic time, Pannotian subcontinents faced intense tectonics in form of collision, extension, and subsidence around Salt Range area. This influenced of the budget of B in SR Formation due to variation in salinity, pH, redox condition [44]. While the correlation of B 3+ with Mg 2+ and SO 4 2− at high concentrations is consistent with the dissolution of carbonate and gypsum minerals, at lower concentrations these correlations hint at fluid inclusions as the sources of these elements, in agreement with Fan et al [5].…”

Section: B Isotope Compositions and Ion Concentrationssupporting

confidence: 86%

Unraveling Sources and Climate Conditions Prevailing during the Deposition of Neoproterozoic Evaporites Using Coupled Chemistry and Boron Isotope Compositions (δ11B): The Example of the Salt Range, Punjab, Pakistan

Hussain

Han

et al. 2021

Minerals

View full text Add to dashboard Cite

In this study, the ion concentrations (K+, Na+, Ca2+, Mg2+, Cl−, SO42−, Br−, NO3−, and B3+) and boron isotope compositions (δ11B) of 34 halite and brines samples from the Neoproterozoic Salt Range Formation, Punjab, Pakistan were studied. Relation among B3+ vs. Mg2+, B3+ vs. SO42−, δ11B vs. B3+, and δ11B vs K+ were observed, they indicated that these elements originate from multiple sources and the end members were identified as seawater, B desorption from clays, and meteoric precipitation. Halite samples of the area under study displayed a Na-HCO3-type to Ca-Cl type sedimentary basin of deposition, on δ11B vs. 1/B plot. Molar ratios of B/Cl vs. δ11B revealed the addition of B in some of the studied samples from desorption of clay minerals. This type of diagenetic desorption of B from clays is the consequence of a stress driven mechanism, generated in the proximity of a decollement zone. Results confirm that the number of B stable isotopes that fractionate between the brine and the halite is low. The halite δ11B from the Salt Range Formation vary from +2.1 to +24.4‰, compared to +17.3 to +26.1‰ in the salt pool brines, and suggest that boron isotope compositions are controlled by the δ11B of the B sources. The positive relationship between the boron content and the corresponding δ11B indicates a higher salinity and drier paleoclimate conditions during the formation process, associated with a high evaporation rate in the Late Neoproterozoic time. Presence of elevated δ11B in the present study, demonstrate compatibility with other marine basins of the world, arising the need for further investigations to better characterize the 11B-enriching processes.

show abstract

Section: B Isotope Compositions and Ion Concentrationssupporting

confidence: 86%