CASS COUNTY. 



87 



TABLE 



SHOWING ANALYSES OF CONGLOMERATE 



[RON ORES FROM CASS COUNTY, TEXAS. 



No. 



o 



« . 

 T3 a 



a o 



Oh 

 P4 



o 



a 

 1 



.5 

 '33 



a 



M 



OS 



3 



1 



o . 

 o<1 



ss 



CO 



6J0 

 t3 



"cS 



o 





709f . . . 



715* ... 



31.53 



57.05 

 48.00 

 35.90 

 35.00 

 37.90 

 31.80 

 21.50 

 35.70 

















22.07 

















29 42 



719* .. . 



57! 94 

 43.42 

 50.36 

 66.29 

 56.35 

















30.56 



720f . . . 

 734* . . . 

















40.56 

















30.39 



736* . . 

















35.25 



743* . . . 

 703f ... 



3.91 





2.60 



0.25 



0.33 

 0.72 



5.20 



100.08 



46.40 

 39.44 

















Analyses in Laboratory of Geological Survey by *J. H. Herndon, fL. E. Magnenat. 



Localities. 

 No. 709. Luanna Ward headright, one and a half miles west of State line between Arkan- 

 sas and Texas. 



No. 715. Silas Dobbs headright, on Knight's bluff road, three miles west of Queen City. 

 Thomas Young survey, near Lanark switch, Texas and Pacific Railway. 

 South side of Hurricane Creek, three miles from Atlanta. 

 Northwest corner of Luanna Ward's headright, six miles northeast of Queen 



No. 719. 

 No. 720. 

 No. 734. 

 City. 



No. 736. 

 No. 743. 



M. Powell's house, southwest corner of S. Harrison headright. 

 Near Hughes' Springs, on E. A. Merchant's headright. 



ANALYSES OF CASS COUNTY IRON ORES. 

 Thirty-nine analyses of the iron ores found in Cass County have been 

 made. Of these, seven are of the laminated class, twenty-four belong to the 

 nodular concretionary grade, and eight are conglomerate ores. 



1. LAMINATED ORES. 



Of the seven laminated ores, five have percentages of silica ranging from 

 18 to 35.80 per cent. One reaches the low figure of 7.28 per cent, and in one 

 the total metallic iron only was determined. 



In sulphur they vary from a trace to twenty-two one-hundredths of one 

 per cent. 



Phosphorus is also present in these ores to a greater or less extent. Traces 

 only are found in two, eleven one-hundredths of one per cent in two more, 

 and another gives a little over four tenths per cent. 



While these impurities are comparatively high, the quantity of metallic 

 iron derived from the ores is low, amounting to only 43.63 per cent in the 

 highest one, No. 731, and 43.18 per cent in No. 509, while the others range 

 from 39.13 per cent down to 30.32 per cent. 



Were there no other considerations regarding these ores, such as the small- 

 ness of the deposits and the high percentages of impurities found in them, 

 the low proportions of metallic iron would militate against their being worked 

 profitably. 



