Abstract:
Khewra Gorge is present in the Eastern Salt Range. It is located about a distance of 1km
from the Khewra town, after this town it is named as Khewra Gorge. “Khewra Gorge is
known as the Museum of Geology.” In this Gorge, Salt range formation which is of Pre-
Cambrian age, Jehlum group rocks which are of Cambrian age, it includes Khewra
Sandstone, Kussak formation, Jutana formation and Baghanwala formation.
Ten rock samples collected from Khewra George were analysed for major ion, metal and
stable carbon and oxygen isotope with the objective to; (i) to determine major cation in
Khewra rock, (ii) to determine and to find correlation among selectee metals in the rocks
of the area and (iii) to find stable carbon and isotope composition of rocks in the area.
Major cations analyzed were Ca, Mg, K Na, while metals analyzed were Al, B, Cd, Co
Cr, Cu Fe, Li, Mn, Ni, Sr and Zn. Stable isotope analyzed were C-13 and O-18.
Calcium, Potassium, Magnesium, and Sodium in Khewra rock samples were in the range
of 19752.0 μ g/g to 319322.5 μg/g, 95.8 μ g/g to 47774.4 μ g/g, 121.1 μ g/g to 63117.7 μ
g/g, and 211.2 μg/g to 42982 μg/g. respectively.
Al concentration in these samples varied from 17.4 μg/g to 108843.5 μg/g with a mean
value of 18962 μg/g. Sample of marl at gypsiferrous bed was very rich in Al with almost
10% Aluminum contents. Boron contents of Khewra george rocks ranges from 8.7 μg/g
to 157.1 μg/g with a mean value of 50.37 μg/g. Maximum concentration is found in
samples of Khewra George Marl which is 157.1 μg/g. Cadmium of Khewra george rocks
ranges from 1.3 μg/g to 108 μg/g with a mean value of 33.78 μg/g. Co was found in
narrow range of 1.2 μg/g to 10 μg/g with a mean value of 3.8 μg/g. Cr is found in
narrow range 6.9 μg/g to 55.6 μg/g with a mean value of 21.47 μg/g. Cu was also
found in narrow range of 2.8 μg/g to 9.4 μg/g with a mean value of 5.2 μg/g. Whereas
Iron concentration in Khewra george rocks varied considerably, from 30.9 μg/g to
26620.7 μg/g with mean value of 7091.11 μg/g. Lithium concentration in Khewra George
Rocks is not widely distributed, it ranged from 2.9 μg/g to 69.6 μg/g with a mean value
of 22.8 μg/g. Mn concentration was widely distributed, it ranged from 3.1 μg/g to 806.9
μg/g with a mean value of 228.07 μg/g. Sr has a range of 38.2 μg/g to 574.5 μg/g and
mean concentration in rock samples is 329.4 μg/g. while Zn concentration in Khewra
