Some data to play with: heat flow from India

This data was taken from Roy and Rao, 2000, Heat Flow in the Indian Shield, JGR, v. 105, p. 25,587-25604.

The tables here are for heat flow values in mW per meter squared from the Deccan province in India the first table, and from the PreCambrian shield area, the second table. The first number is the heatflow, and the second is the reported standard error. More complete information can be found in the original source.

We can ask what is the difference in the distribution of values for the Deccan volcanic province vs. the Precambrian shield, and what are typical numbers for the shield area, and are they different from the Deccan area. There are simple models that might predict a difference. Could there may be any latent heat from the Deccan trap magmatism and volcanism that occurred some 65 Ma? How important is the lower vs. higher concentration of heat-producing radioactive nucleides in granitic vs. mafic rocks.

Table 1 below: Heat flow values from the Deccan Traps.

 36  1.6
 43  .7
 49  .8
 46  .8
 40  .6
 35  .8
 39  .9
 36  .3
 48  .8
 54  .6
 46  .3
 44  1.3
 40  .2
 73  1.3
 60  1.1
 39  .8
 35  .3
 38  .8
 37  1.7
 34  1.5
 42  1.0
 41  1.7
 46  1.9
 48  1.2
 71  1.7
 67  1.4
 49  .8
 59  .8
 66  1.9
 59  .8
 47  .9
 46  .9
 39  1
 33  .5
 40  .6
 33  .4
 43  1
 43  .6
 44  .6

Table 2 below: heatflow values from the Dharwar craton

 56  .6
 46  1.2
 51  1.3
 52  1.3
 47  1.7
 48  .7
 51  .3
 49  .6
 40  .9
 38  .5
 38  1
 42  1.3
 30  1.0
 30  .9
 33  1.1
 31  .7
 24  .6
 25  .7
 33  1.4
 29  1.4
 25  .8
 25  .9
 15  .5
 15  .5
 17  .5
 23  .6
 37  .8
 35  .8
 43  1.1
 36  .4
 30  .8