Der Weltverkehr und seine Mittel

Bibliographic data

Monograph

Identifikator:: 1794536604

URN:: urn:nbn:de:zbw-retromon-186153

Document type:: Monograph

Title:: Binnengrosshandel

Place of publication:: Berlin

Publisher:: Beuth-Vertrieb GmbH

Year of publication:: [1960]

Scope:: 2, 46, 1 Blatt; Tab

Digitisation:: 2022

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: 3. Ergebnisse der Untersuchung

Collection:: Economics Books

ORES OF GOLD Ly, The propylitic origin of some gold explains the contro- VEIsy as to whether dykes enrich or impoverish adjacent lodes. A lode may be poor where in contact with a dyke and rich where separated from it, and vice versa. Such Apparent inconsistencies are explained by the AI Mine at Wood's Point in Victoria ; it consists of horizontal floors of Juartz in hornblende-porphyrite ; where that rock is normal the quartz is barren, but where the rock has been altered 0 propylite the quartz-floors are auriferous. The gold is due to the Propylitization and not to the dyke. Tur CLassiFicaTIoN OF GoLp Ores Gold, owing to its ubiquitous distribution is found m2 sreat variety of gre deposits. Excluding some of the important occurrences in contact deposits, and as an gh 0 constituent in many sulphides the chief ores may be classifie as follows :— Sect, A—Primary_ L Gold-quarty F issure Lodes— (a) In sedimentary rocks, California ; Ballarat. S (5) In gneisses and schists. Mysore; Brazi 1 Rhodesia, (¢) In volcanic rocks, Rocky Mountains ; New Zealand, (d) Pneumatoly tic, Cripple Creek; Passagem, Brazil, (I Isolateq Gold-quarts Veins i Saddle and Ladder Lodes— (a) Saddle-lodes, Bendigo; Nova Scotia. as. Vi (0) Ladder-lodes, Wood's Point + Little Bendigo, Vic- toria ; Berezovsk. {¢) Radial-lodes, Charters Towers, III. Impregnations and Replacement Bodies. Homestake, N. Dakota ; Alaska Treadwell ; Kalgoorlie, W. Australia ; Porcupine, Ontario. Sect. B—Secondary enrichments. Londonderry, W. Aus- tralia; Mt. Morgan, Queensiand, Sect, C—Ailuyigg Deposits— Surface drifts and leads. Deep leads, Victoria and Kanowna., Marine placers, 5 Ancient placers. Rang Banket; Gold Coast ; . Dakota; Morro Velho, Brazil.

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