Diamictite is the result of melting icebergs floating in the ocean when releasing dropstones down to the ocean floor, where they mix with marine sediments. Note that dropstones are exogenetic debris that carried by icebergs from different continental mother rocks.
The Dwyka diamictite is very variable in South Africa ranging from an almost clast supported terrestrial variety to silt/mudstone with scattered clasts in the marine environment. There has also been a lot or reworking of the diamictite..
In SA generally have 2 facies (Elandvlei and Mbizani Formations) although there are significant variations.
Roger Walker and Nick Eyles have produced a great compilation called "Facies Models" with one chapter written by Nick Eyles entirely of summarising how to interpret ancient glacial deposits. Happy to hear from you by Email so I can help. ALTERNATELY, contact Professor Nick Eyles Earth Sciences, Toronto University, Canada.
Dear Raj Kumar, I advise you to find Nikolay Chumakov articles, who studied the problem of Precambrian glaciations for a long time. He is in the list of ResGate participants. His adress in RG: https://www.researchgate.net/profile/Nikolay_Chumakov.
Some his articles you may find in attachment.
Best wishes
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