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ID 2828
Title Transcription
シセイダイ ノ デイシツガン ニ ミラレル カガク ソセイ ノ タヨウカ ナンブ アフリカ カープバールクラプトン オヨビ リンポポタイ ノ レイ
Title Alternative (English)
Compositional Variation of Archean Pelitic Rocks : A Case Study of the Kaapvaal Craton and Limpopo Belt, Southern Africa
File
language
eng
Author
Tsunogae, Toshiaki
Description
Major and minor elements chemistry of Archean pelitic rocks was analyzed by X-ray fluorescence spectrometer. Samples were collected from three different terranes in southern Africa; Barberton and Sutherland greenstone belts in the Kaapvaal Craton, granulite terrane of the Southern Marginal Zone of the Limpopo Belt, and supracrustal sequences of the Central Zone of the Limpopo Belt. Although bulk chemical composition varies from sample to sample, pelitic rocks from the Kaapvaal Craton exhibit similar composition to those from the Southern Marginal Zone. In contrast, those from the Central Zone have wide compositional range probably because they were supplied from many different sources.
An enrichment in Ni and Cr in pelitic rocks from the Kaapvaal Craton and Southern Marginal Zone was well observed. The Ni and Cr contents increase from 30 to 260 ppm and 10 to 580 ppm (Central Zone) to 280 to 550 ppm and 710 to 1410 ppm (Southern Marginal Zone and Kaapvaal Craton), respectively. The enrichment in Ni and Cr in particular pelitic rocks can be inferred from the presence of high Ni- and Cr-bearing rocks (komatiite?) on the earth surface during sedimentation.
Journal Title
Memoirs of the Faculty of Education, Shimane University. Natural science
Volume
28
Start Page
25
End Page
33
ISSN
05869943
Published Date
1994-12-25
NCID
AN00107941
Publisher
島根大学教育学部
Publisher Aalternative
The Faculty of Education Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Education
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