Identifier: reports9190miss (find matches)
Title: (Reports)
Year: 1903 (1900s)
Authors: Missouri. Division of Geological Survey and Water Resources
Subjects: Geology Mines and mineral resources
Publisher: Rollo (etc.)
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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om 6 to 6 feet. Beneath this clay occurs an unde-termined thickness of residual material, consisting of drusy quartz,fragments of dense chert and masses of barite embedded in redclay. The barite occurs in bunches irregularly scattered throughthis cherty horizon and is always associated with drusy quartz.It has a milk white color and is opaque, altho frequently largemasses are obtained which have a mottled appearance due to thepresence of iron oxide along cleavage planes. In some parts ofthe diggings, both hematite and galena are associated with thebarite and drusy quartz. In other places only one of these is found.The hematite usually occurs as a thin layer coating the drusy (238) Missouri BUREAU of Geology and Minks. Vol. IX., Series 2, Plate XXXVII. ZlBOEXD. h. 1 Roiic Roods.h! Secondory RoodsF—nJ Ro,/roods ^\US Tp ond SeaUnes; ;CW Tp.L,nes. \Lor,d-Qror,t Lrtes ; » \M,ne Sho^rs ^ .<*-.» erdCeeAS~_ ^»re»itttnr Sfraone J&aritct jC^ j rod^ino rtreos \ OtfdHGfflroduongAreas
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Barite producing area near Mineral Point BARITE. 239 quartz, while the galena occurs chiefly in cubes disseminatedthrough the barite. Wherever any of the galena occurs on thesurface of the barite masses, it is oxidized and usually coveredwith a thin coating of lead carbonate. The barite is mined by sinking a circular shaft 31/^ to 4 feetin diameter. This shaft usually extends into the barite horizonfrom 3 to 4 feet. After it has reached this depth, the barite isremoved with a pick and shovel for a distance of from 3 to 5 feetaway from the circumference of the shaft after which it is aban-doned and allowed to cave in. See Plates XXXVIII and CXX.Frequently several shafts are sunk close together and in thesecases the barite horizon is usually mined out between the shafts.As a rule these shafts do not exceed 15 feet in depth. From thosethat are shallow the barite is thrown out by hand, but in the deeperdiggings it is elevated with a hand windlass. In mining no blast-ing is required, the p

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