scholarly journals Tephra glass chemistry provides storage and discharge details of five magma reservoirs which fed the 75 ka Youngest Toba Tuff eruption, northern Sumatra

2019 ◽  
Vol 35 (1-2) ◽  
pp. 256-271 ◽  
Author(s):  
Nicholas J.G. Pearce ◽  
John A. Westgate ◽  
Guilherme A.R. Gualda ◽  
Emma Gatti ◽  
Ros F. Muhammad
2019 ◽  
Author(s):  
Jordan Lubbers ◽  
◽  
Adam J.R. Kent ◽  
Frank Tepley ◽  
Dawid Szymanowski

ACS Omega ◽  
2019 ◽  
Vol 4 (7) ◽  
pp. 11515-11521 ◽  
Author(s):  
Angela N. Marquard ◽  
Jonathan C. T. Carlson ◽  
Ralph Weissleder

SEG Discovery ◽  
2000 ◽  
pp. 1-20
Author(s):  
JEREMY P. RICHARDS

ABSTRACT Large-scale crustal lineaments are recognized as corridors (up to 30 km wide) of aligned geological, structural, geomorphological, or geophysical features that are distinct from regional geological trends such as outcrop traces. They are commonly difficult to observe on the ground, the scale of the features and their interrelationships being too large to map except at a regional scale. They are therefore most easily identified from satellite imagery and geophysical (gravity, magnetic) maps. Lineaments are believed to be the surface expressions of ancient, deep-crustal or trans-lithospheric structures, which periodically have been reactivated as planes of weakness during subsequent tectonic events. These planes of weakness, and in particular their intersections, may provide high-permeability channels for ascent of deeply derived magmas and fluids. Optimum conditions for magma penetration are provided when these structures are placed under tension or transtension. In regions of subduction-related magmatism, porphyry copper and related deposits may be generated along these lineaments because the structures serve to focus the ascent of relatively evolved magmas and fluid distillates from deep-crustal magma reservoirs. However, lineament intersections can only focus such activity where a magma supply exists, and when lithospheric stress conditions permit. A comprehensive understanding of regional tectono-magmatic history is therefore required to interpret lineament maps in terms of their prospectivity for mineral exploration.


2014 ◽  
Vol 395 ◽  
pp. 254-266 ◽  
Author(s):  
Jennifer Jay ◽  
Fidel Costa ◽  
Matthew Pritchard ◽  
Luis Lara ◽  
Bradley Singer ◽  
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Keyword(s):  

2018 ◽  
Vol 368 ◽  
pp. 13-30 ◽  
Author(s):  
Marie Edmonds ◽  
Andrew W. Woods
Keyword(s):  

2021 ◽  
Author(s):  
Friedemann Samrock ◽  
Alexander Grayver ◽  
Olivier Bachmann ◽  
Özge Karakas ◽  
Martin Saar

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