Isotopic variation in the Tuolumne Intrusive Suite, central Sierra Nevada, California

Kistler, Ronald W.; Chappell, B. W.; Peck, Dallas L.; Bateman, Paul C.

doi:10.1007/bf00592937

Cited by 187 publications

(132 citation statements)

References 32 publications

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“…2). Prior to knowledge of precise geochronology, intrusive suite zoning was attributed to some in situ process, either sidewall crystallization, magma mixing or fractional crystallization (Bateman and Chappell, 1979;Frey et al, 1980;Kistler et al, 1986;Sawka et al, 1990).…”

Section: Reproduction Of Granitoid Compositional Behavior By Thermal mentioning

confidence: 99%

“…(B) Compositional variations across the TIS for MgO, CaO, FeO t and SiO 2 showing the normal compositional zonation typical of Sierra Nevada plutons. Initial 87 Sr/ 86 Sr (Kistler et al, 1986; all corrected to 87 Ma) for the tonalite rims and Johnson granite porphyry shown at top. (C) An AFM (alkalies-total iron-magnesia) diagram showing the general correspondence between the bulk composition variations in the experiment of Huang et al (2009) with the trend of calc-alkaline rocks from the TIS (Bateman and Chappell, 1979) and the Onion Valley gabbros (Sisson et al, 1996).…”

Section: Reproduction Of Granitoid Compositional Behavior By Thermal mentioning

confidence: 99%

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Hypothesis for the origin of convergent margin granitoids and Earth’s continental crust by thermal migration zone refining

Lundstrom

2009

Geochimica et Cosmochimica Acta

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Section: Reproduction Of Granitoid Compositional Behavior By Thermal mentioning

confidence: 99%

Section: Reproduction Of Granitoid Compositional Behavior By Thermal mentioning

confidence: 99%

Hypothesis for the origin of convergent margin granitoids and Earth’s continental crust by thermal migration zone refining

Lundstrom

2009

Geochimica et Cosmochimica Acta

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“…For example, the isotope signatures of the Mesozoic to Tertiary Andean granites indicate a dominant mantle component (Lucassen et al 2004). Sr, Nd, and O isotope data for the Sierra Nevada granitoid batholith (California) suggest hybrid magmas with mixed mantle and crustal sources (DePaolo 1981a;Domenick et al 1983;Kistler et al 1986;Kistler & Peterman 1973). In the central Sierra Nevada batholith the similar ages of the mafic intrusions and the granodiorites (Coleman et al 1995) and the chemical similarity between the gabbros and granites (Sisson et al 1996) suggest that they are genetically linked.…”

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confidence: 99%

The sources of granitic melt in Deep Hot Zones

Annen¹,

Blundy

Sparks

2008

Transactions of the Royal Society of Edinburgh: Earth Sciences

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A Deep Hot Zone develops when numerous mafic sills are repeatedly injected at Moho depth or are scattered in the lower crust. The melt generation is numerically modelled for mafic sill emplacement geometries by overaccretion, underaccretion or random emplacement, and for intrusion rates of 2, 5 and 10 mm/yr. After an incubation period, melts are generated by incomplete crystallisation of the mafic magma and by partial melting of the crust. The first melts generated are residual from the mafic magmas that have low solidi due to concentration of H 2 O in the residual liquids. Once the solidus of the crust is reached, the ratio of crustal partial melt to residual melt increases to a maximum. If wet mafic magma, typical of arc environments, is injected in an amphibolitic crust, the residual melt is dominant over the partial melt, which implies that the generation of I-type granites is dominated by the crystallisation of mafic magma originated from the mantle and not by the partial melting of earlier underplated material. High ratios of crustal partial melt over residual melt are reached when sills are scattered in a metasedimentary crust, allowing the generation of S-type granites. The partial melting of a refractory granulitic crust intruded by dry, high-T mafic magma is limited and subordinate to the production of larger amount of residual melt in the mafic sills. Thus the generation of A-type granites by partial melting of a refractory crust would require a mechanism of selective extraction of the A-type melt.

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“…The more detailed information on rock composition and geochemistry can be found in Bateman and Chappell (1979), Kistler et al (1986), and Gray et al (2008).…”

Section: Geological Settingmentioning

confidence: 99%

Magmatic erosion of the solidification front during reintrusion: the eastern margin of the Tuolumne batholith, Sierra Nevada, California

Žák

Paterson

2009

Int J Earth Sci (Geol Rundsch)

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The Tuolumne batholith, Sierra Nevada, California, consists of several nested granitoid units and is an example of upper-crustal normally zoned intrusions. The two outermost units of the batholith are separated by a wide gradational contact in what is interpreted to represent a large magma chamber. In the Potter Point area near the eastern margin of the batholith, the gradational contact is cross-cut by a network of interconnected mafic-felsic sheets, which grade into zones of magmatic erosion by stoping where the host granodiorite between the sheets was entirely removed and replaced by younger enclave-rich quartz diorite. We interpret these features to record disruption of a steep solidification front, which migrated inwards from the eastern batholith margin and separated the mushy to solidified margin from the remaining active magma chamber. When intersecting the gradational contact, the solidification front started to break up via a network of tectonically driven fractures accompanied by simultaneous injection of localized magma pulses. The solidification front break-up is interpreted here as an initial stage of a ''recycling'' process, whereby older magma mush is disrupted and incorporated into younger magma batches, a process we propose to have been widespread along internal contacts in the Tuolumne magma chamber.

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Isotopic variation in the Tuolumne Intrusive Suite, central Sierra Nevada, California

Cited by 187 publications

References 32 publications

Hypothesis for the origin of convergent margin granitoids and Earth’s continental crust by thermal migration zone refining

Hypothesis for the origin of convergent margin granitoids and Earth’s continental crust by thermal migration zone refining

The sources of granitic melt in Deep Hot Zones

Magmatic erosion of the solidification front during reintrusion: the eastern margin of the Tuolumne batholith, Sierra Nevada, California

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