Hydrochemical impact of a mantle plume recorded by petrology, geochemistry, and U Pb geochronology of a calcite vein within the Ottawa-Bonnechere graben, Ontario, Canada

2021 ◽  
pp. 120582
Author(s):  
George R. Dix ◽  
Donald W. Davis ◽  
Kamil Chadirji-Martinez ◽  
Daniel D. Marshall ◽  
Jill L. Kendrick ◽  
...  
Keyword(s):  
Mantle Plume ◽  
Calcite Vein

Ultramafic-alkaline-carbonatite complexes as a result of two-stage melting of mantle plume: evidence from the mid-paleoproterozoic Tiksheozero intrusion, Northern Karelia, Russia

2019 ◽  
Vol 486 (4) ◽  
pp. 460-465
Author(s):  
E. V. Sharkov ◽  
A. V. Chistyakov ◽  
M. M. Bogina ◽  
O. A. Bogatikov ◽  
V. V. Shchiptsov ◽  
...  
Keyword(s):  
Fractional Crystallization ◽  
Mantle Plume ◽  
Large Igneous Province ◽  
Intrusive Complex ◽  
Incongruent Melting ◽  
Isotopic Data ◽  
Two Stage ◽  
Similar Composition ◽  
Igneous Province ◽  
Alkaline Magmas

Tiksheozero ultramafic-alkaline-carbonatite intrusive complex, like numerous carbonatite-bearing complexes of similar composition, is a part of large igneous province, related to the ascent of thermochemical mantle plume. Our geochemical and isotopic data evidence that ultramafites and alkaline rocks are joined by fractional crystallization, whereas carbonatitic magmas has independent origin. We suggest that origin of parental magmas of the Tiksheozero complex, as well as other ultramafic-alkaline-carbonatite complexes, was provided by two-stage melting of the mantle-plume head: 1) adiabatic melting of its inner part, which produced moderately-alkaline picrites, which fractional crystallization led to appearance of alkaline magmas, and 2) incongruent melting of the upper cooled margin of the plume head under the influence of CO2-rich fluids  that arrived from underlying zone of adiabatic melting gave rise to carbonatite magmas.

U-PB CALCITE VEIN AGES AND THE CASE FOR ACADIAN STRUCTURAL DEVELOPMENT IN THE APPALACHIAN BASIN

2019 ◽  
Author(s):  
Robert D. Jacobi ◽  
◽  
Ryan Mathur ◽  
Ryan Mathur ◽  
Ashley S.B. Douds ◽  
...  
Keyword(s):  
Appalachian Basin ◽  
Structural Development ◽  
Calcite Vein

The Late Jurassic Panjeh submarine volcano in the northern Sanandaj-Sirjan Zone, northwest Iran: Mantle plume or active margin?

Lithos ◽  
2018 ◽  
Vol 308-309 ◽  
pp. 364-380 ◽  
Author(s):  
Hossein Azizi ◽  
Federico Lucci ◽  
Robert J. Stern ◽  
Shima Hasannejad ◽  
Yoshihiro Asahara
Keyword(s):  
Mantle Plume ◽  
Late Jurassic ◽  
Submarine Volcano ◽  
Active Margin ◽  
Sanandaj Sirjan Zone ◽  
Northwest Iran
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