Origin of Mesoproterozoic A-type granites in Laurentia: Hf isotope evidence

Goodge, John W.; Vervoort, Jeffrey D.

doi:10.1016/j.epsl.2006.01.040

Cited by 282 publications

(170 citation statements)

References 62 publications

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“…Rivers et al, 2012). Goodge & Vervoort (2006) show that the~1.4 Ga Atype granites of the mid-continent have Hf-t DM ages spanning from 2.0-1.65 Ga and crustal residence times matching the formation age of the basement they intrude. In Yavapai/Mazatzal rocks in New Mexico, Rämö et al, (2003) recorded juvenile additions that imply subcontinental enrichment at 1650…”

Section: Implications For the Grenville Provincementioning

confidence: 99%

“…The Penokean Province extends from central Minnesota eastward to Ontario, Canada where it pinches out at the Grenville Front in Ontario (Davidson, 1995; Page 5 of 53 A c c e p t e d M a n u s c r i p t Holm, 1999). Whole-rock Nd model ages of the Penokean belt are quite uniform at about 2.1 Ga (Barovich et al, 1989;Holm et al, 2005) and Hf model ages of A-type granites intruding the Penokean Province range from 2.2-2.1 Ga (Goodge & Vervoort, 2006).…”

Section: Penokean Province (19 To 18 Ga)mentioning

confidence: 99%

“…When adding the mean Hf values of granites intruding the Laurenthian basement from Goodge & Vervoort (2006) to our εHf-time plot (Fig. 5), the samples from the southern Granite-Rhyolite Province are the only samples corresponding to the Grenvillian array.…”

Section: Implications For the Grenville Provincementioning

confidence: 99%

“…7). Unfortunately the Mazatzal was not included in the Goodge & Vervoort (2006) dataset, but the geographical location of the Mazatzal at~1.6 Ga (Whitmeyer & Karlstrom, 2007) and Page 28 of 53 A c c e p t e d M a n u s c r i p t the juvenile character of the 1.68-1.65 Ga rock that constitute the oldest in the Mazatzal Province (Karlstrom et al, 2004) opens the possibility of the Mazatzal Province as a protolith to the subsurface basement in Ohio (Fig. 7).…”

Section: Implications For the Grenville Provincementioning

confidence: 99%

See 3 more Smart Citations

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

Petersson

Scherstén

Andersson

et al. 2015

Precambrian Research

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Section: Implications For the Grenville Provincementioning

confidence: 99%

Section: Penokean Province (19 To 18 Ga)mentioning

confidence: 99%

Section: Implications For the Grenville Provincementioning

confidence: 99%

Section: Implications For the Grenville Provincementioning

confidence: 99%

See 2 more Smart Citations

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

Petersson

Scherstén

Andersson

et al. 2015

Precambrian Research

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“…The melting of the lower crust associated to mantle plume action or extensional thinning of the lithosphere associated with stress release-stages and generation of faults or mega-fractures are some of the tectonic models for A-type granites production (e.g. Windley 1991, Frost et al 2001b, Goodge & Vervoort 2006, Martin et al 2012.…”

Section: Discussionmentioning

confidence: 99%

K'Mudku A-type magmatism in the southernmost Guyana Shield, central-north Amazon Craton (Brazil): the case of Pedra do Gavião syenogranite

Souza

Dantas

et al. 2015

Braz. J. Geol.

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<p>The Mesoproterozoic K'Mudku event (1490 - 1147 Ma) is represented by a britlle-ductile shear belt that cuts across the Paleoproterozoic units in the southernmost Guyana shield, central-north Amazon craton. This event produced mylonitization and cataclasites at low/medium- to high-grade metamorphic, and local within-plate magmatism. In the Amazonas State, Brazil, A-type magmatism chronologically associated to K'Mudku has been reported for the Pedra do Gavião and Samaúma syenogranites. However, the spatial relationship between K´Mudku event and A-type magma generation are not yet adequately clarified in the region. The Pedra do Gavião syenogranite is a high-K alkaline, metaluminous, reduced A-type granite with a post-collisional to within-plate geochemical signature. It has U-Pb zircons crystallization age of 1218 Ma and inherited zircons with ages between 1820 and 1720 Ma, which, together with the Sm-Nd data, suggest melting of Paleoproterozoic basement rocks of the Cauaburi Complex (1810 - 1780 Ma) regional unit. These data demonstrate that the effects of the A-type magmatism associated to the end of the Grenvillian-Sunsas orogeny, reported primarily in the southwestern margin of the Amazon craton, may also be extended for the central-northern part of the Amazon craton. Probably the generation or emplacement mechanisms of A-type magma occurred with some degree of involvement in the final stages of the K´Mudku event. However, this tectonic framework conception still needs more geological and geophysical investigations. Therefore, these news data should instigate to the return of geological research in the region, as well as to debate on the tectonic evolution and A-type granites production during the Ectasian-Stenian period in the central-north Amazon craton.</p>

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Accurate Hf isotope determinations of complex zircons using the “laser ablation split stream” method

Fisher

Vervoort

DuFrane

2014

Geochem Geophys Geosyst

151

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[1] The ''laser ablation split stream'' (LASS) technique is a powerful tool for mineral-scale isotope analyses and in particular, for concurrent determination of age and Hf isotope composition of zircon. Because LASS utilizes two independent mass spectrometers, a large range of masses can be measured during a single ablation, and thus, the same sample volume can be analyzed for multiple geochemical systems. This paper describes a simple analytical setup using a laser ablation system coupled to a singlecollector (for U-Pb age determination) and a multicollector (for Hf isotope analyses) inductively coupled plasma mass spectrometer (MC-ICPMS). The ability of the LASS for concurrent Hf 1 age technique to extract meaningful Hf isotope compositions in isotopically zoned zircon is demonstrated using zircons from two Proterozoic gneisses from northern Idaho, USA. These samples illustrate the potential problems associated with inadvertently sampling multiple age and Hf components in zircons, as well as the potential of LASS to recover meaningful Hf isotope compositions. We suggest that such inadvertent sampling of differing age and Hf components can be a significant cause of excess scatter in Hf isotope analyses and demonstrate that the LASS approach offers a robust solution to these issues. The veracity of the approach is demonstrated by accurate analyses of 10 reference zircons with well-characterized age and Hf isotopic composition, using laser spot diameters of 30 and 40 mm. In order to expand the database of high-precision Lu-Hf isotope analyses of reference zircons, we present 27 new isotope dilution-MC-ICPMS Lu-Hf isotope measurements of five U-Pb zircon standards: FC1, Temora, R33, QGNG, and 91500.

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Origin of Mesoproterozoic A-type granites in Laurentia: Hf isotope evidence

Cited by 282 publications

References 62 publications

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

Zircon U-Pb, Hf and O isotope constraints on growth versus reworking of continental crust in the subsurface Grenville orogen, Ohio, USA

K'Mudku A-type magmatism in the southernmost Guyana Shield, central-north Amazon Craton (Brazil): the case of Pedra do Gavião syenogranite

Accurate Hf isotope determinations of complex zircons using the “laser ablation split stream” method

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