Strontium and neodymium isotopic study of the western Mogollon-Datil volcanic region, New Mexico, USA

Bikerman, Michael; Bell, Keith; Card, Jeffrey W.

doi:10.1007/bf00306549

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…Areas from which there are published analyses include: Laramide and mid-Tertiary plutonic and volcanic rocks in southern Arizona Lang and Titley, 1998;Anthony andTitley, 1988, Bouse et al, 1999), the mid-Tertiary Mogollon-Datil volcanic fi eld in southern New Mexico (Bikerman et al, 1992;Hawkesworth, 1993, 1995;Menzies et al, 1983), the Organ Needle pluton in southern New Mexico (Verplanck et al, 1999), mid-Tertiary volcanic rocks from the Uvas volcanic fi eld in southern New Mexico (McMillan and Dickin, 1994), and midTertiary volcanic rocks in western Texas Potter, 1996;James and Henry, 1993a). Published data in northwestern Mexico include mid-Tertiary volcanic rocks at several locations in western Chihuahua (Lanphere et al, 1980;Barreiro et al, 1982;Cameron and Cameron, 1985;Albrecht et al, 1990;McDowell et al, 1999;Albrecht and Goldstein, 2000), a number of locations in eastern Chihuahua (Cameron and Cameron, 1985;Gunderson et al, 1986;Cameron et al, 1989;James and Henry, 1993a;James et al, 1994;Smith et al, 1996), Laramide plutonic rocks in Sonora (Damon et al, 1983;Mead et al, 1988), as well as basaltic andesites throughout northwestern Mexico (Cameron et al, 1989).…”

Section: Previous Isotopic Studiesmentioning

confidence: 98%

“…James and Henry extended this boundary southwestward into central Chihuahua in studies of ore deposits (James and Henry, 1993b) and mid-Tertiary volcanic rocks (James et al, Farmer and DePaolo (1984), Lang and Titley (1998, used only data for districts in the "South Pb Province" contiguous with Sonora), Anthony and Titley (1988), Bouse et al (1999, used only data for districts in the "South Pb Province" contiguous with Sonora), Bikerman et al (1992), Hawkesworth (1993, 1995), Menzies et al (1983), Verplanck et al (1999), McMillan and Dickin (1994), Cameron et al (1996), Potter (1996, Henry (1993a), McDowell et al (1999), Lanphere et al (1980), Barreiro et al (1982), Cameron and Cameron (1985), Albrecht et al (1990), Albrecht and Goldstein (2000), Gunderson et al (1986), Cameron et al (1989), James et al (1994), Smith et al (1996), Damon et al (1983), Mead et al (1988), Menzies et al (1983), Nimz et al (1993), and Roden et al (1988). NHRL is the Northern Hemisphere Reference Line from Hart (1984).…”

Section: Proposed Isotope Provinces In Northwestern Mexicomentioning

confidence: 98%

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Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement configuration

Housh¹,

McDowell²

2005

The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives

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We have identifi ed fi ve distinct isotope provinces in northwestern Mexico in a study of the Sr, Nd, and Pb isotope geochemistry of Laramide and mid-Tertiary igneous rocks in Sonora and Chihuahua as well as adjacent portions of southwestern United States. Province A, in northern Sonora, is characterized by very unradiogenicNd and Pb isotopic compositions and radiogenic Sr isotopic compositions. Unradiogenic Nd and radiogenic Sr and Pb isotopic compositions characterize Province B, in central Sonora. Provinces A and B are fl anked to the east and south by Provinces C, D, and E, which are characterized by more radiogenic Nd and less radiogenic Sr isotopic compositions than observed in Provinces A and B. Rocks from Provinces C, D, and E have similar Sr and Nd isotopic compositions, although the variation observed in rocks from Province E is more restricted than in Provinces C and D. These provinces are unique, however, in their Pb isotopic compositions; rocks from Province C are the least radiogenic whereas those from Province E are the most radiogenic.The identifi ed isotope provinces correlate well with the constraints imposed by the geology of the southwestern United States and northwestern Mexico. The primary factor controlling the geographic distribution of isotope provinces in northwestern Mexico appears to be the age of the crust that the magmas passed through and with which they interacted. Provinces A and B are interpreted to refl ect the area underlain by old, early Proterozoic basement in northwestern Sonora; the signifi cance of the difference in Pb isotopic compositions between rocks in Provinces A and B is not clear. We interpret Province C, located in northern Chihuahua and adjacent regions of Texas, to refl ect the distribution of mid-Proterozoic crust of the North American craton that has been overprinted by Grenvillian deformation. Province D is located in a belt running from central Chihuahua into southwesternTexas and is interpreted to refl ect the distribution of exotic crust that was accreted to the southern margin of the North American craton during Ouachita convergence; this crustal block consists of a Paleozoic arc sequence developed on Proterozoic basement. Lastly, we interpret Province E, located in southern Sonora and Chihuahua, as exotic Jurassic-Cretaceous arc crust accreted during the late Mesozoic.The observed distribution of isotope provinces in northwestern Mexico is not consistent with the Mojave-Sonora megashear hypothesis. In particular, the NNE-trendHoush, T.B., and McDowell, F.W., 2005, Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement confi guration, in Anderson, T.H., Nourse, J.A., McKee, J.W., and Steiner, M.B., eds., The Mojave-Sonora megashear hypothesis: Development, assessment, and alternatives: Geological Society of America Special Paper 393, p. 671-692.

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Section: Previous Isotopic Studiesmentioning

confidence: 98%

Section: Proposed Isotope Provinces In Northwestern Mexicomentioning

confidence: 98%

Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement configuration

Housh¹,

McDowell²

2005

The Mojave-Sonora Megashear Hypothesis: Development, Assessment, and Alternatives

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“…Middle Top Figure 8. εNd vs. 87 Sr/ 86 Sr diagram Blue triangles are data from Bikerman et al (1992).…”

Section: Bottommentioning

confidence: 99%

“…(3) Boron isotope analysis (4) Connection between Bloodgood Canyon Tuff and the Apache Spring Tuff. Apache Spring Tuff 27.9 Ma (McIntosh et al, 1990) Compositionally zoned High-silica rhyolite tuff >1200 km 3 (Ratté et al, 1984) Lithic-rich Moderately to densely welded Fanney Rhyolite 24.4 and 26.4 Ma (Bikerman et al, 1992) Resurgent dome and ring-intrusives Crystal-poor Flow-banded rhyolite . Assimilation and Fractional crystallization model.…”

Section: Future Research Will Includementioning

confidence: 99%

Geochemistry and Evolution of the Bloodgood Canyon Tuff, Mogollon-Datil Volcanic Field, New Mexico, Usa: The Evolution of Crystal Sizes in an Open Magmatic System

Salings¹,

Michelfelder²,

Rentz³

2016

Geological Society of America Abstracts With Programs

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Background The Bloodgood Canyon tuff is a rhyolitic ignimbrite erupted at 28 Ma in southwestern New Mexico, USA. Three samples representing the stratigraphic section were studied in an effort to better understand the pre-and syn-eruptive history of the magma storage system and place constraints on the timescales of its existence. The samples contain phenocrysts of K-spar>Plag>Quartz>Biotite>Titanite, few lithic fragments, and pumice. Here we present bulk-rock geochemistry and crystal size distributions (CSDs) for crystals ranging from ~10 to 2000 µm for three mineral phases: plagioclase, quartz and K-feldspar. Quartz phenocrysts are usually euhedral but may be broken up or resorbed. Phenocrysts of quartz are typically smaller than the K-feldspars that frequent the samples (~100 µm versus 1000-2000 µm K-feldspars). The CSD slope for this population is a linear trend that steepens until it nears the 1000 µm scale. The plagioclase phenocrysts occur in two phases: one as larger, sieved and resorbed phenocrysts, and second as smaller euhedral twinned phenocrysts. The CSD slope for plagioclase is a concave up trend, with few phenocrysts between 100 and 1000 µm, and a higher population of <100 µm phenocrysts than >1000 µm. K-feldspar phenocrysts are typically sanidine and occur as large, sieved phenocrysts, large, unsieved phenocrysts, or small, non-twinned euhedral phenocrysts. It is very uncommon to see a twinned K-feldspar phenocryst in these samples. The CSD slope for K-feldspar is a parabola because of the equal distribution of <100 µm and >1000 µm phenocrysts. We interpret these crystal populations as resulting from a shift in crystallization regime. We suggest that the CSD slopes describe a pre-eruptive quartz + K-feldspar growth dominated regime and a plagioclase unstable regime. This was followed by a population that grew during nucleation at the onset of decompression at the initiation of eruption represented by the steeper slope. Initial crystal growth may coincide with eruption and collapse of the Gila Cliff Dwellings caldera 4 million years before the eruption of the BCT as indicated by the larger resolved crystal phases. Remobilization of the magma mush may have destabilized the magma chamber and allowed new phenocryst populations to grow for thousands of years before eruption.

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Generation of voluminous silicic magmas and formation of mid-Cenozoic crust beneath north-central Mexico: evidence from ignimbrites, associated lavas, deep crustal granulites, and mantle pyroxenites

Smith

Cameron

McDowell

et al. 1996

Contributions to Mineralogy and Petrology

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Strontium and neodymium isotopic study of the western Mogollon-Datil volcanic region, New Mexico, USA

Cited by 8 publications

References 42 publications

Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement configuration

Isotope provinces in Laramide and mid-Tertiary igneous rocks of northwestern Mexico (Chihuahua and Sonora) and their relation to basement configuration

Geochemistry and Evolution of the Bloodgood Canyon Tuff, Mogollon-Datil Volcanic Field, New Mexico, Usa: The Evolution of Crystal Sizes in an Open Magmatic System

Generation of voluminous silicic magmas and formation of mid-Cenozoic crust beneath north-central Mexico: evidence from ignimbrites, associated lavas, deep crustal granulites, and mantle pyroxenites

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