File:Transactions (1895) (14596532868).jpg

Identifier: transactions14cana (find matches)
Title: Transactions
Year: 1895 (1890s)
Authors: Canadian Institute of Mining and Metallurgy
Subjects: Mineral industries Mines and mineral resources
Publisher: Montreal (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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d,so as to form stock-works, they are often nearer together thanthe distance to which re))lacement arising from a singlefissure may readily extend and the entire rock ma.ss is replacedwith its outer limits determined by the limits of the fracturedportion of the country rock. As movements which result in therupture of rocks generally occur along lines or linear zones whoselonger diameter is very much greater than the distance across thefractured zones, such ore deposits are generally linear, i.e., verymuch longer than they are broad. The presence of stockwork-like fi.ssures can be readily detected in such maases at tluiredges as there the fractures are fewer in number and runout into the unmineralized rock. The replacement shoots arisingfrom them al.so run out into the country, forming a ;>eculiar fringeof little offshoots or apophy.sivs which by their parallel arrange-ment disclose the presence of the fissure systems which havegiven ri.se to thm. 410 Replacement Ore-Bodies—Irving
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Replacement Ore-Bodies—Irving 411 In massive rocks, like heav> bedded limestones, the fracturingof the rock is often so irregular that the polygonal blocks whichintervene between individual joints have very complicated formsand the resulting ore masses are characterized by the most extra-ordinar\^ and intricate form. Fig. 6 will illustrate this. O^^^.

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