摘要:

Presented is a comparative investigation of the palaeogeographic and tectonic conditions in Scania and the Eastern Baltic, based on one common aspect: the longlasting effect of a tectonically positive feature (the Baltic Shield) upon the development of the surrounding depressional areas. The discussion of the history of the shield margin in Scania takes as its starting point the last phases of the Variscian Era. New discoveries in Scania prove the existence there of perhaps all the substages of the Lower Jurassic (Liassic). Stratigraphic relations are being explained with the aid of drill test sections. It is demonstrated, that the Saxonic movements in Scania are, contrary to common opinion, related to features of expansion, not of compression. Torsional tension in the marginal areas of the shield, is seen as the reason for this kind of tectonic behaviour. The more quiet development, both in space and time, of the shield margin in the Eastern Baltic during the Silurian and Devonian, is outlined. Conditions during the Upper Devonian are more thoroughly discussed.

ISSN:0016-786X    

DOI:10.1080/11035895909449146

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The association between typical accessory minerals of granitic pegmatites and accompanying feldspars, micas, quartz, petalite and spodumene has been studied statistically in a fairly large mineral collection. The results are thought to be representative for Sweden. Localities outside Fennoscandia fit the general picture thus derived, but the foreign material is too small to give a reliable picture on its own. The following minerals have been considered: Allanite, gadolinite, topaz, beryl, tourmaline, monazite, apatite, triplite, triphyline, lithiophilite, amblygonite, euxenite, fergusonite, yttrotantalite, columbite, tantalite, cassiterite and microlite.

ISSN:0016-786X    

DOI:10.1080/11035895909449147

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449148

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449149

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

The principles of air photo interpretation in reference to the mapping of superficial deposits are presented, and the question of suitable photograph scales for interpretation is also discussed. Techniques and problems resulting from interpretation studies in the northern part of Swedish Lapland are described.

ISSN:0016-786X    

DOI:10.1080/11035895909449150

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

A brief history is given of the term leucodiabase together with a review of its present-day meaning and scope. Occurrences in Finnmark, northern Norway are described and it is concluded that these are the result of intense metasomatism on or close to planes of faulting. This interpretation is extended to similar occurrences in Norrbotten, Sweden and its possible application to others in northern Finland and the Karelian district of the U.S.S.R. discussed.

ISSN:0016-786X    

DOI:10.1080/11035895909449151

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449152

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449153

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449154

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449155

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor