@Abdelfattah,
how about a carbonotite? I can think of only two places in the world where its found in any amounts and on is, of course, the Arabian peninsula.
Are you setting up discrete K zones wrt to the geology?
Im not ure I could point you to any hydro chqrqcteristics of the stuff since its a serpentinite alteration .
Its not sedimentary at all.
good luck.