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02403nab a2200229 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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GSMBLIc |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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210728b ||||| |||| 00| 0 eng d |
| 041 ## - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
Einglish Language |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Ludden, John |
| 9 (RLIN) |
11343 |
| 245 ## - TITLE STATEMENT |
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| Title |
The tectonic evolution of the abitibi greenstone belt of Canada |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
153-166pp. |
| Other physical details |
Illustration |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Based on structural, geochemical, sedimentological and geochronological studies, we have formulated a model for the evolution of the late Archaean Abitibi greenstone belt of the Superior Province of Canada. The southern volcanic zone (SVZ) of the belt is dominated by komatiitic to tholeiitic volcanic plateaux and large, bimodal, mafic-felsic volcanic centres. These volcanic rocks were erupted between approximately 2710 Ma and 2700 Ma in a series of rift basins formed as a result of wrench-fault tectonics.<br/><br/>The SVZ superimposes an older volcanic terrane which is characterized in the northern volcanic zone (NVZ) of the Abitibi belt and is approximately 2720 Ma or older. The NVZ comprises basaltic to andesitic and dacitic subaqueous massive volcanics which are cored by comagmatic sill complexes and layered mafic-anorthositic plutonic complexes. These volcanics are overlain by felsic pyroclastic rocks that were comagmatic with the emplacement of tonalitic plutons at 2717 ±2 Ma.<br/><br/>The tectonic model envisages the SVZ to have formed in a series of rift basins which dissected an earlier formed volcanic arc (the NVZ). Analogous rift environments have been postulated for the Hokuroko basin of Japan, the Taupo volcanic zone of New Zealand and the Sumatra and Nicaragua arcs. The difference between rift related ‘submergent’ volcanism in the SVZ and ‘emergent’ volcanism in the NVZ resulted in the contrasting metallogenic styles, the former being characterized by syngenetic massive sulphide deposits, whilst the latter was dominated by epigenetic ‘porphyry-type’ Cu(Au) deposits.<br/><br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Tectonic evolution - Abitibi greenstone belt - Canada |
| 9 (RLIN) |
11344 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Deformation |
| 9 (RLIN) |
8891 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Structural geology |
| 9 (RLIN) |
1235 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Volcanic evolution |
| 9 (RLIN) |
11345 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Plutonic rocks |
| 9 (RLIN) |
6312 |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Hubert, Claude |
| 9 (RLIN) |
11346 |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Gariépy, Clement |
| 9 (RLIN) |
11347 |
| 773 0# - HOST ITEM ENTRY |
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| Host Biblionumber |
1893 |
| Host Itemnumber |
2181 |
| Place, publisher, and date of publication |
London Cambridge University Press 1986 |
| Other item identifier |
002533 |
| Title |
Geological magazine : Vol. 123 Iss. 1-6 Year. 1986 |
| International Standard Serial Number |
00167568 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
|
| Call number suffix |
{082b} |
| Koha item type |
Article |
