48 FLUORSPAR DEPOSITS OF S0TTTHP:RN TLLTNOTS. [btu.l. i'55. 



o-eiu ral course N. 45° E. Near the fanlt and on the hano-ino;-wall 

 side tlie sandstone is tilted to an ano-le of 44°. The old Eureka 

 workino's, Avhieh \^ere open at the time Mr. Emmons visited the area, 

 were on this vein. A laro'e amount of s[);n- was shipped from them 

 and the vein Avas proved to a dej^th of SO feet. 



At present the Marion Mineral C\)mi)any is sinking a shaft far- 

 ther to the northeast. The vein stutf eimsists of brecciated limestone 

 with purple and white fluorspar crystallized with calcite. In druses 

 the spar, calcite, and some small quartz crystals are crystallized 

 together. 



In the vicinity there are several faults and a number of small pros- 

 pects. These are represented on the map. ( )ne of the most interest- 

 ing of the faults is east of Big Creek and is locally known as the 

 '' Copper vein." It has a course X. 37° W., and shows limestone on 

 both walls. At the surface is a reef of highly silicified limestone 

 projecting above the ground. The vein is al)out G feet wide and 

 consists of a breccia of limestone cemented by calcite and with some 

 crystals of (juartz. Stains of malachite occur, but no other metallic 

 mineral was observed. The surface outcrop shows cavities left by 

 the leaching out of some flat, tabidar crystals, possibly barite. The 

 vein is of interest because of the unusual character of its contents 

 and its course, nearly at right angles to the others discussed. It has 

 not, so far, proved of any value and seems to l)elong with the barren 

 calcite veins near by. 



IIIC'KS AREA. 



ResiniK' of (jcohxiii. — The Kicks area includes the greater part of 

 a small structural dome in which beds from the Devonian black shale 

 to the Mansfield conglomerate are exposed. The mines are confined 

 exclusively to the area of outcrop of tlu» Chester formations, and to a 

 very notable degree the ore is develo|)ed in or near the Ste. Genevieve 

 limestone (PI. III). 



Em p'irc mi lie. — The Empire is perhaps the best known of the mines 

 l>ack from the Ohio River. It has been worked at different times for 

 a number of years and has made several shipments. In the vicinity 

 there are a number of faults which for the most part seem to be of 

 small throw. The more important ones only are represented on 

 ;he accompanying map. The Empire vein follows a fault with a 

 course N. 48° E. and a dip 73° SE. At the shaft limestone is found 

 on both sides of the vein, and the amount of faulting does not seem 

 large. The fault is normal, with downthrow to the east. This is 

 indicated by the upturning of the shale partings in tl:M? beds of the 

 hanging wall and by the general relations of the rocks. In the 

 field north of the mine the Rosiclare and Ohara members of the vSte. 



