Evidence for on‐going inflation of the Socorro Magma Body, New Mexico, from interferometric synthetic aperture radar imaging

Fialko, Yuri; Simons, M.

doi:10.1029/2001gl013318

Cited by 71 publications

(47 citation statements)

References 13 publications

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“…1), a sill-like intrusion at ~19 km depth (Rinehart and Sanford, 1981;Ake and Sanford, 1988;Balch et al, 1997) that causes active uplift of the overlying region (Fialko and Simons, 2001;Pearse and Fialko, 2010;Reiter et al, 2010). Heat fl ow data suggest that the Socorro magma body is only the most recent manifestation of a much longer lived magmatic plumbing system within the rift (Reiter et al, 2010).…”

Section: Geologic Setting Of the Study Areasmentioning

confidence: 94%

“…Two of the large-volume travertine deposits in New Mexico, Mesa Aparejo and the Riley travertine (Fig. 2), are in the proximity of an active magmatic system, both located near the margins of the Socorro magma body system, a sill-like intrusion at ~19 km depth (Rinehart and Sanford, 1981;Ake and Sanford, 1988;Balch et al, 1997) that causes active uplift in the area (Fialko and Simons, 2001;Pearse and Fialko, 2010;Reiter et al, 2010) and long-lived high heat fl ow (Reiter et al, 2010). The travertine deposit at Mesa Del Oro is associated with Cenozoic basaltic volcanism (Fig.…”

Section: Introductionmentioning

confidence: 96%

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U-series geochronology of large-volume Quaternary travertine deposits of the southeastern Colorado Plateau: Evaluating episodicity and tectonic and paleohydrologic controls

et al. 2014

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Large-volume travertine deposits in the southeastern Colorado Plateau of New Mexico and Arizona, USA, occur along the Jemez lineament and Rio Grande rift. These groundwater discharge deposits refl ect vent locations for mantle-derived CO 2 , which was conveyed by deeply sourced hydrothermal fl uid input into springs. U-series dating of stratigraphic sections shows that major aggradation and large-volume (2.5 km 3 ) deposition took place across the region episodically at 700-500 ka, 350-200 ka, and 100-40 ka. These pulses of travertine formation coincide with the occurrence of regional basaltic volcanism, which implies an association of travertine deposits with underlying low-velocity mantle that could supply the excess CO 2 . The calculation of landscape denudation rates based on basalt paleosurfaces shows that travertine platforms developed on local topographic highs that required artesian head and fault conduits. Episodic travertine accumulation that led to the formation of the observed travertine platforms represents conditions when fault conduits, high hydraulic head, and high CO 2 fl ux within confi ned aquifer systems were all favorable for facilitating large-volume travertine formation, which was therefore controlled by tectonic activity and paleohydrology. By analogy to the active Springerville-St. Johns CO 2 gas fi eld, the large volumes and similar platform geometries of travertine occurrences in this study are interpreted to represent extinct CO 2 gas reservoirs that were vents for degassing of mantle volatiles into the near-surface system.

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Section: Geologic Setting Of the Study Areasmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 96%

U-series geochronology of large-volume Quaternary travertine deposits of the southeastern Colorado Plateau: Evaluating episodicity and tectonic and paleohydrologic controls

et al. 2014

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“…Socorro (New Mexico) [Fialko and Simons, 2001;Fialko et al, 2001b] and Uturuncu (Bolivia) [Pritchard and Simons, 2004] do show steady uplift, but at significantly slower rates than at Lazufre (2 mm/yr for Socorro and 1 cm/yr for Uturuncu), and the inflationary sources are deeper (~20 km). The steadiness of uplift in those cases has been attributed to wellestablished longer-timescale processes (thermal inertia and viscoelastic relaxation in the case of Socorro [Pearse and Fialko, 2010] and a diapir emerging buoyantly from a large midcrustal sill in the case of Uturuncu [Fialko and Pearse, 2012]).…”

Section: Discussionmentioning

confidence: 99%

Source model of deformation at Lazufre volcanic center, central Andes, constrained by InSAR time series

Pearse

Lundgren

2013

Geophysical Research Letters

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[1] Recent interferometric synthetic aperture radar (InSAR) observations of the Lazufre region, central Andes, show large-scale uplift at a rate of about 3 cm/yr, beginning between 1998 and 2002. The initiation of this activity during the ERS satellite mission and its proximity to active volcanoes have made Lazufre the focus of several studies aimed at understanding its source geometry, its relation to nearby volcanoes, and whether or not the source area is expanding. There now exists a longer time series from multiple ERS/ENVISAT satellite tracks that allows a more comprehensive examination of the source geometry and its temporal and spatial variation, if any. We processed 15 years of InSAR data from three separate tracks; modeling the different look geometries provided greater resolution of source depth and geometry. We conclude that the source is a shallowly dipping sill at a depth of about 8 km, with no evidence of lateral expansion. Citation: Pearse, J., and P. Lundgren (2013), Source model of deformation at Lazufre volcanic center, central Andes, constrained by InSAR time series,

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“…Dike intrusions are the mechanism of oceanic crustal formation, yet their passage through oceanic and continental crust is diffi cult to detect: small magnitude earthquakes that are rarely detected on global seismic networks (e.g., Einarsson and Brandsdóttir, 1980;Delaney et al, 1998;Rubin et al, 1998;Dziak et al, 2004;Tolstoy et al, 2006). The repeat time of magma intrusions lacking eruptions is even less well constrained, since their unambiguous identifi cation relies on measuring the pattern of surface deformation (e.g., Fialko and Simons, 2001;Biggs et al, 2009;Grandin et al, 2009;Pagli et al, 2012). The advent of space geodetic methods during the last ~15-20 years are now revealing critical constraints on the frequency and distribution of these sometimes seismically "quiet" events, as outlined in Section 3 below.…”

Section: A B Cmentioning

confidence: 99%

The time scales of continental rifting: Implications for global processes

Ebinger

Wijk

Keir

2013

The Web of Geological Sciences: Advances, Impacts, and Interactions

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The rifting cycle initiates with stress buildup, release as earthquakes and/or magma intrusions/eruptions, and visco-elastic rebound, multiple episodes of which combine to produce the observed, time-averaged rift zone architecture. The aim of our synthesis of current research initiatives into continental rifting-to-rupture processes is to quantify the time and length scales of faulting and magmatism that produce the time-averaged rift structures imaged in failed rifts and passive margins worldwide. We compare and contrast seismic and geodetic strain patterns during discrete, intense rifting episodes in magmatic and amagmatic sectors of the East African rift zone that span early-to late-stage rifting. We also examine the longer term rifting cycle and its relation to changing far-fi eld extension directions with examples from the Rio Grande rift zone and other cratonic rifts. Over time periods of millions of years, periods of rotating regional stress fi elds are marked by a lull in magmatic activity and a temporary halt to tectonic rift opening. Admittedly, rifting cycle comparisons are biased by the short time scale of global seismic and geodetic measurements, which span a small fraction of the 10 2 -10 5 year rifting cycle. Within rift sectors with upper crustal magma chambers beneath the central rift valley (e.g., Main Ethiopian, Afar, and Eastern or Gregory rifts) seismic energy release accounts for a small fraction of the deformation; most of the strain is accommodated by magma intrusion and slowslip. Magma intrusion processes appear to decrease the time period between rifting episodes, effectively accelerating the rift to rupture process. Thus, the inter-seismic period in rift zones with crustal magma reservoirs is strongly dependent upon the

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Evidence for on‐going inflation of the Socorro Magma Body, New Mexico, from interferometric synthetic aperture radar imaging

Cited by 71 publications

References 13 publications

U-series geochronology of large-volume Quaternary travertine deposits of the southeastern Colorado Plateau: Evaluating episodicity and tectonic and paleohydrologic controls

U-series geochronology of large-volume Quaternary travertine deposits of the southeastern Colorado Plateau: Evaluating episodicity and tectonic and paleohydrologic controls

Source model of deformation at Lazufre volcanic center, central Andes, constrained by InSAR time series

The time scales of continental rifting: Implications for global processes

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