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New measurements of crystal doming over the Socorro magma body, New Mexico

1980; Geological Society of America; Volume: 8; Issue: 6 Linguagem: Inglês

10.1130/0091-7613(1980)8 2.0.co;2

1943-2682

Robert Reilinger, Jack Oliver, L. D. Brown, Allan Sanford, Emery I. Balazs,

Seismic Waves and Analysis

Research Article| June 01, 1980 New measurements of crystal doming over the Socorro magma body, New Mexico Robert Reilinger; Robert Reilinger 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar Jack Oliver; Jack Oliver 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar Larry Brown; Larry Brown 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar Allan Sanford; Allan Sanford 2Geoscience Department, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 Search for other works by this author on: GSW Google Scholar Emery Balazs Emery Balazs 3Vertical Control Branch, National Geodetic Survey, Rockville, Maryland 20852 Search for other works by this author on: GSW Google Scholar Author and Article Information Robert Reilinger 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Jack Oliver 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Larry Brown 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853 Allan Sanford 2Geoscience Department, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 Emery Balazs 3Vertical Control Branch, National Geodetic Survey, Rockville, Maryland 20852 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1980) 8 (6): 291–295. https://doi.org/10.1130/0091-7613(1980)8 2.0.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Robert Reilinger, Jack Oliver, Larry Brown, Allan Sanford, Emery Balazs; New measurements of crystal doming over the Socorro magma body, New Mexico. Geology 1980;; 8 (6): 291–295. doi: https://doi.org/10.1130/0091-7613(1980)8 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Recent releveling measurements conducted in the Socorro area of the Rio Grande rift specifically to study possible crustal deformation indicate uplift of the central part of the rift (Socorro) relative to bench marks to the west (Magdalena). Total relative uplift measured along the newly releveled line between 1934 and 1978.7 reached 10 ± 1 cm. Combining this new information with previously reported releveling data suggests a roughly elliptical uplift affecting at least 7,000 km2. Maximum observed uplift near the center of this area reaches about 20 cm relative to the periphery. The uplift occurs directly above an unusual crustal discontinuity at a depth of about 20 km below this part of the rift. This discontinuity, discovered on the basis of seismic evidence, has been inferred to be the upper boundary of an extensive magma body. The spatial coincidence of the zone of uplift and the presumed magma body, the persistent microearth-quake activity, and the modeling results strongly suggest that the observed movements result from expansion of the Socorro magma body. Although available data are not sufficient to determine uniquely the temporal behavior of the doming, the observations are consistent with more or less continuous uplift averaging about 5 mm/yr during the time the movements were monitored (1909 to 1979). The average inflation rate within the magma body required to produce the observed uplift is on the order of 1 to 2 × 10−2 km3/yr and is consistent with measurements in volcanic regions.Although less clearly defined, the leveling data also suggest relative uplift within the Albuquerque-Belen Basin well beyond the presumed northern boundary of the Socorro magma body. If this uplift is associated with magmatic activity, the Socorro magma body extends considerably farther north than previously expected, or another magma body lies beneath the Albuquerque-Belen Basin. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.