摘要:

Fluctuations in mineralogical composition of banded gneisses along a profile, 230 mm of length, are given. The rocks are shown to have suffered a potash metasomatism, giving rise to light-coloured layers or veins rich in potash feldspar and surrounded by rims of biotite and epidote. The influence of tectonical movements upon the development of different kinds of light-coloured layers, veins, and irregular bodies is pointed out.

ISSN:0016-786X    

DOI:10.1080/11035895709447169

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

Different skarn mineral associations from mines and exploratory works in the Grythytte field, Sweden, are examined from a mineralogical point of view. The relations between the ore forming and skarn-forming process are discussed, and the mineralogical and chemical changes that took place during the skarn forming process are outlined. (English summary on p. 158.)

ISSN:0016-786X    

DOI:10.1080/11035895709447170

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

The conodont faunas treated in this paper are from the zone ofDidymograptus balticusin South-Central Sweden and the zone ofClimacograptus wilsoniin SW Scotland. On conodont evidence, theDidymograptus balticuszone is correlated with limestone strata intermediate between the Lower and the Upper Planilimbata Limestone. The conodont fauna of theClimacograptus wilsonizone is described and figured, but no new species is named.

ISSN:0016-786X    

DOI:10.1080/11035895709447171

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

The present paper includes the results obtained by geological survey during mining operations in the since 1954 abandoned and submerged Lövås mine, situated in Central Sweden.

ISSN:0016-786X    

DOI:10.1080/11035895709447172

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895709447173

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

The copper mineralization of Northern Rhodesia and Katanga

ISSN:0016-786X    

DOI:10.1080/11035895709447174

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

In the summer of 1956 a fragment of a mammoth tusk was discovered at Rättvik in Dalecarlia, Central Sweden (Text-fig. 1). It lay somewhere in the upper 2.5 m of the ground moraine which is almost 30 m thick in the neighbourhood of the finding place. The piece is 35 cm long, and the circumference at its ends is 22.5 and 19.5 cm, respectively. Very likely it is a part of a comparatively small tusk of approximately the same size as that described by Heintz (1956) from Skreia, S. Norway, and thus belonged to a female.

ISSN:0016-786X    

DOI:10.1080/11035895709447175

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895709447176

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

摘要:

In dieser Arbeit wurden die Mineralkomponenten des primären Erzbestandes der Lagerstätte von Ergani in der Türkei beschrieben. Sie wurden dem Alter nach in vier Gruppen aufgeteilt. Besonders ausfuhrlich wurden die Mineralien Picotit und Linneit behandelt.

ISSN:0016-786X    

DOI:10.1080/11035895709447177

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895709447178

出版商:Taylor & Francis Group    

年代:1957

数据来源: Taylor