| 词条 | Abitibi greenstone belt |
| 释义 |
The Abitibi greenstone belt is a 2,800-to-2,600-million-year-old greenstone belt that spans across the Ontario–Quebec border in Canada.[1] It is mostly made of volcanic rocks, but also includes ultramafic rocks, mafic intrusions, granitoid rocks, and early and middle Precambrian sediments.[2] Geographical extentThe Abitibi greenstone belt is one of the world's largest Archean greenstone belts. It appears to represent a series of thrusted subterranes that exhibit similar geological, geochemical, and isotopical signatures as those formed during the evolution of paired active-arc-back-arc systems. The huge 2,707-to-2,696-million-year-old Blake River Megacaldera Complex is within the belt. See also
References1. ^{{cite journal|last1=Cater|first1=D.F.|title=Macassa Mine Geology|journal=Society of Economic Geologists|date=1991|volume=Archean Gold Deposits of the Matachewan-Kirkland Lake-Larder Lake Area, Ontario, Canada|issue=Guidebook Series Vol. II|pages=9–10}} {{Greenstone belts}}{{DEFAULTSORT:Abitibi Greenstone Belt}}{{Ontario-geo-stub}}{{Quebec-geo-stub}}2. ^Archean greenstone belt{{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }} Retrieved on 2007-09-26 5 : Greenstone belts|Neoarchean volcanism|Precambrian Canada|Volcanism of Ontario|Volcanism of Quebec |
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