Die Heimarbeit im Kriege

The Elements of economic geology

Bibliographic data

Monograph

Identifikator:: 885356659

URN:: urn:nbn:de:zbw-retromon-5912

Document type:: Monograph

Author:: Gaebel, Käthe http://d-nb.info/gnd/1023047020; Schulz, Max von http://d-nb.info/gnd/1033198951

Title:: Die Heimarbeit im Kriege

Place of publication:: Berlin

Publisher:: Verlag von Franz Vahlen

Year of publication:: 1917

Scope:: 1 Online-Ressource (210 Seiten)

Digitisation:: 2017

Collection:: Economics Books

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

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: VI. Die Bekämpfung der Arbeitslosigkeit und ihrer Folgen

Collection:: Economics Books

ECONOMIC GEOLOGY mountain-movements of the Upper Carboniferous and Lower Permian, e.g. most of the British, German, and Mediter- ranean ores; but those of Leadville and most other fields in the Rocky Mountains and the Andes are Eocene. The lead ores may be classified as follows :— A. PriMARY ORES— I. Fissure lodes: Freiberg; Pennines; Leadhills, etc., Comstock, Nevada; Cceur d'Alene, Idaho; Linares, Spain. II. Replacement Ore-Bodies— (4) Massive primary ore-bodies: Bawdwin, Burma; Broken Hill; Rhodesian Broken Hill; Sullivan, British Columbia. (6) Ores with igneous rocks :— 1. Contact ores beside plutonic masses: South Hill, Idaho. 2. Ores associated with quartz-porphyry sheets: Leadville, Magdalena, Kelantan, etc. B. SecoNpDARY OREs— III. (a) Disseminations: Missouri. {b) Flats and ore bodies due to descending solutions: Missouri; Silesia; Aachen; Rhodesia. IV. Sedimentary ores: Commern; St. Sebastian, Gard; Mendip Hills. )8 SECTION A. Primary OREks Fissure LopEs—GERMANY, BriTAIN, SPAIN, COMSTOCK— The primary lodes depend mainly on the nature of the country rocks. The classical primary lead lodes are at Freiberg in Saxony, where mining was begun by refugees from Central Germany in the tenth century. The mining field is in the Erzgebirge or Ore-Mountains of Saxony in a dome-shaped uplift of gneiss, on which rest fossiliferous Cambrian rocks. The uplift produced an intersecting network of fissures, with more than 1100 lodes. They are classified into four chief groups, which were formed at two dates. The older series includes three groups: (1) the Noble-Lead lodes with 340 veins, are in two series trending at right-angles, one to

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