| Title: |
SECULAR CHANGES IN RELATIONSHIPS BETWEEN PLATE-TECTONIC AND MANTLE-PLUME ENGENDERED PROCESSES DURING PRECAMBRIAN TIME |
| Authors: |
MINTS MIKHAIL V.; ERIKSSON PATRICK G. |
| Publisher Information: |
Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук |
| Publication Year: |
2016 |
| Collection: |
CyberLeninka (Scientific Electronic Library) / Научная электронная библиотека «Киберленинка» |
| Subject Terms: |
PRECAMBRIAN,PLATE-TECTONICS,PLUME-TECTONICS,GRANULITE-GNEISS BELTS,SUPERCONTINENT,INTRACONTINENT OVAL OROGEN,ДОКЕМБРИЙ,ТЕКТОНИКА ПЛИТ,ТЕКТОНИКА ПЛЮМОВ,ГРАНУЛИТО-ГНЕЙСОВЫЙ ПОЯС,СУПЕРКОНТИНЕНТ,ВНУТРИКОНТИНЕНТАЛЬНЫЙ ОВАЛЬНЫЙ ОРОГЕН |
| Description: |
Paradoxically, the lists of "proxies" of both plateand plume-related settings are devoid of even a mention of the high-grade metamorphic rocks (granulite, amphibolite and high-temperature eclogite facies). However, the granulite-gneiss belts and areas which contain these rocks, have a regional distribution in both the Precambrian and the Phanerozoic records. The origin and evolution of the granulite-gneiss belts correspond to the activity of plumes expressed in vigorous heating of the continental crust; intraplate magmatism; formation of rift depressions filled with sediments, juvenile lavas, and pyroclastic flow deposits; and metamorphism of lower and middle crustal complexes under conditions of granulite and high-temperature amphibolite facies that spreads over the fill of rift depressions also. Granulite-gneiss complexes of the East European Craton form one of the main components of the large oval intracontinental tectonic terranes of regional or continental rank. Inclusion of the granulite-gneiss complexes from Eastern Europe, North and South America, Africa, India, China and Australia in discussion of the problem indicated in the title to this paper, suggests consideration of a significant change in existing views on the relations between the plateand plume-tectonic processes in geological history, as well as in supercontinent assembly and decay. The East European and North American cratons are fragments of the long-lived supercontinent Lauroscandia. After its appearance at ~2.8 Ga, the crust of this supercontinent evolved under the influence of the sequence of powerful mantle plumes (superplumes) up to ~0.85 Ga. During this time Lauroscandia was subjected to rifting, partial breakup and the following reconstruction of the continent. The processes of plate-tectonic type (rifting with the transition to spreading and closing of the short-lived ocean with subduction) within Lauroscandia were controlled by the superplumes. Revision of the nature of the granulite-gneiss complexes has led to a fundamental new ... |
| Document Type: |
text |
| File Description: |
text/html |
| Language: |
unknown |
| Availability: |
http://cyberleninka.ru/article/n/secular-changes-in-relationships-between-plate-tectonic-and-mantle-plume-engendered-processes-during-precambrian-time; http://cyberleninka.ru/article_covers/16932979.png |
| Accession Number: |
edsbas.B5AAB721 |
| Database: |
BASE |
