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- W2912647606 abstract "Long-lived, high-angle fault systems constitute high-permeability zones that can localize the flow of hydrothermal fluids and magma through the upper crust. Intersections of these types of structures can develop complex interference patterns, which constitute areas of intense damage (networks of small-scale faults and fractures) in which permeability may be significantly enhanced. This is relevant for understanding both the regional-scale structural control on the emplacement of mineral deposits and volcanic centers and on the distribution of areas of active upper-crustal seismicity. In the Andes of central Chile, regional-scale geophysical (magnetic, gravimetric, seismic) and structural datasets demonstrate that the architecture of this Andean segment is defined by NW- and NE-striking fault systems, oblique to the N-S trend of the magmatic arc. Fault systems with the same orientations are well developed in the basement of the Andes. The intersections of conjugate arc-oblique faults constitute the site of emplacement of Neogene intrusive complexes and giant porphyry Cu-Mo deposits, and define the location of major clusters of upper-crustal earthquakes and active volcanic centers, suggesting that these fault systems are still being reactivated under the current stress regime. A proper identification of one-dimensional, lithospheric-scale high-permeability zones located at the intersections of high-angle, arc-transverse fault systems could be the key to understanding problems such as the structural controls on magmatic and hydrothermal activity and the patterns of upper-crustal seismicity in the Andes and similar orogenic belts." @default.
- W2912647606 created "2019-02-21" @default.
- W2912647606 creator A5049817023 @default.
- W2912647606 date "2019-01-30" @default.
- W2912647606 modified "2023-09-23" @default.
- W2912647606 title "Long-lived damage zones associated with fault intersections in the Andes of Central Chile" @default.
- W2912647606 hasPublicationYear "2019" @default.
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