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Hf-177/Lu-176
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Hf-177/Lu-176
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Image
Plots of initial 176 Hf/ 177 Hf v. 176 Lu/ 177 Hf ( a ) and εHf v. appare...
Published: 01 May 2011
Fig. 11. Plots of initial 176 Hf/ 177 Hf v. 176 Lu/ 177 Hf ( a ) and εHf v. apparent age ( b ) showing the results of Lu–Hf spot analyses of zircons from samples G03-8, G07-1 and G07-2. Filled symbols correspond to concordant U–Pb analyses; open symbols are discordant. Error bars are 2σ
Image
Relationship between 176 Lu/ 177 Hf and 176 Hf/ 177 Hf (t) , and 206 Pb/...
Published: 01 November 2009
Fig. 9. Relationship between 176 Lu/ 177 Hf and 176 Hf/ 177 Hf (t) , and 206 Pb/ 238 U age and εHf (t) values for the different domains in zircon from allanite-bearing paragneiss S27 and orthogneiss S28 in drill hole CCSD-PP2. (a) and (b) 176 Lu/ 177 Hf vs. 176 Hf/ 177 Hf(t) for zircon
Image
Figure 5. (A) 176 Lu/ 177 Hf versus 176 Hf/ 177 Hf isochron diagram for Z...
Published: 01 July 2006
Figure 5. (A) 176 Lu/ 177 Hf versus 176 Hf/ 177 Hf isochron diagram for Zunhua peridotites, yielding an isochron age of 2528 ± 130 Ma. (B) Hf isotopic evolution of the depleted mantle through time (modified from Bennett, 2004 ). The initial ϵ Hf data for Zunhua peridotites plot well above
Image
Figure 3. 176 Hf/ 177 Hf versus 176 Lu/ 177 Hf for northern French Massif...
Published: 01 April 2006
Figure 3. 176 Hf/ 177 Hf versus 176 Lu/ 177 Hf for northern French Massif Central mantle clinopyroxenes (cpx). Inset graph provides magnified view of Montboissier and Fraisse samples. Also shown is a 360 Ma reference isochron (dashed line)
Image
176 Hf/ 177 Hf plotted against relative proportion of 176 (Yb + Lu)/ 176 H...
Published: 01 August 2011
Figure 4. 176 Hf/ 177 Hf plotted against relative proportion of 176 (Yb + Lu)/ 176 Hf (shown as a percentage), for all solution analyses performed over the course of this study. Data were normalized to 179 Hf/ 177 Hf = 0.72350 ( Patchett and Tatsumoto, 1980 ; Patchett, 1983 ), and 173 Yb
Image
( 230 Th/ 238 U) vs. δ (Sm/Nd) , δ (Lu/Hf) , and 176 Hf/ 177 Hf. δ (Lu/Hf)...
Published: 01 January 2003
Figure 4. ( 230 Th/ 238 U) vs. δ (Sm/Nd) , δ (Lu/Hf) , and 176 Hf/ 177 Hf. δ (Lu/Hf) is an indicator of the amount of residual garnet, whereas δ (Sm/Nd) is an indicator of the degree of melting. For the Hawaiian basalts, the highest degree melts (low δ (Sm/Nd) ) with the least prominent
Image
Lu–Hf systematics in metamorphic zircon. A) 176 Hf/ 177 Hf isotopic evolut...
Published: 01 August 2017
Figure 7. Lu–Hf systematics in metamorphic zircon. A) 176 Hf/ 177 Hf isotopic evolution over time for different components of a gabbroic rock that crystallized magmatic zircon at time 0 and metamorphic zircon 100 Ma later, in a garnet bearing assemblage. Because zircon is the main host of Hf
Image
Zircon Lu-Hf isotope plots for rocks from the study area. (A) 176 Hf/ 177 ...
Published: 01 July 2017
Figure 15. Zircon Lu-Hf isotope plots for rocks from the study area. (A) 176 Hf/ 177 Hf i vs. age (Ma). (B) ε Hf ( t ) vs. age (Ma). CHUR—chondritic uniform reservoir.
Image
Plots of zircon ɛ Hf ( t ) versus the 176 Lu/ 177 Hf ratio. Core-to-rim ...
Published: 18 October 2013
Figure 6. Plots of zircon ɛ Hf ( t ) versus the 176 Lu/ 177 Hf ratio. Core-to-rim variation is shown by arrowed
tie lines connecting data from the same grain. Error bars indicate
2 σ standard error. The closed and open symbols represent zircon
Image
Plot of 176 Lu/ 177 Hf versus 146 Sm/ 144 Nd modified from Vervoort et a...
Published: 09 May 2018
Figure 13. Plot of 176 Lu/ 177 Hf versus 146 Sm/ 144 Nd modified from Vervoort et al. (2011) .
Image
(a) 176 Lu/ 177 Hf – age and (b) εHf(t) – age plots for zircons in the pre...
Published: 01 March 2012
Fig. 6 (a) 176 Lu/ 177 Hf – age and (b) εHf(t) – age plots for zircons in the present study. I and II means type I and II zircons, respectively. Data for zircons from Myanmar and Osayama jadeitite are from Shi et al. (2009) and Fu et al. (2010) , respectively.
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(A) ϵNd t versus 147 Sm/ 144 Nd. (B) ϵHf t versus 176 Lu/ 177 Hf. (C) T...
Published: 01 October 2009
Figure 8. (A) ϵNd t versus 147 Sm/ 144 Nd. (B) ϵHf t versus 176 Lu/ 177 Hf. (C) T DM (Hf) versus T DM (Nd). Initial epsilon values are calculated at 360 Ma. Depleted mantle model (T DM ) for Hf model ages [T DM (Hf)] and ϵHf t are from Vervoort and Blichert-Toft (1999) . Depleted mantle
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Figure 2. 176 Lu/ 177 Hf vs. 147 Sm/ 144 Nd diagram for southern African ...
Published: 01 May 2004
Figure 2. 176 Lu/ 177 Hf vs. 147 Sm/ 144 Nd diagram for southern African lower-crustal xenoliths. Dashed lines indicate CHUR (chondritic uniform reservoir) values; field of continental crust and other xenolith data are from Vervoort et al. (2000)
Journal Article
Hf isotopes of MARID (mica-amphibole-rutile-ilmenite-diopside) rutile trace metasomatic processes in the lithospheric mantle
Journal: Geology
Publisher: Geological Society of America
Published: 01 January 2005
Geology (2005) 33 (1): 45-48.
... that the MARID rutiles initially resulted from the interaction of an asthenospheric melt with ancient depleted harzburgitic mantle with low 176 Hf/ 177 Hf ratios (<0.2812) and Lu/Hf ratios of ∼0.04, that dominated their Hf budget. The MARID rocks were later metasomatized by a fluid and/or melt that had caused...
FIGURES
Journal Article
Lu-Hf and Sm-Nd geochronological constraints on the influence of subduction metamorphism in controlling the Hf-Nd terrestrial array: Evidence from the world’s orogenic belts
Journal: Geosphere
Publisher: Geological Society of America
Published: 19 March 2019
Geosphere (2019) 15 (3): 607-620.
... oceanic crust. On a global scale, the coupled Lu-Hf and Sm-Nd isotope systematics of this crust closely align with the Hf-Nd terrestrial array and have average 176 Lu/ 177 Hf and 147 Sm/ 144 Nd ratios within error of the chondritic uniform reservoir values. This is an important finding because it suggests...
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Journal Article
Decoupling of the Lu-Hf and Sm-Nd isotope systems during the evolution of granulitic lower crust beneath southern Africa
Journal: Geology
Publisher: Geological Society of America
Published: 01 May 2004
Geology (2004) 32 (5): 405-408.
...Figure 2. 176 Lu/ 177 Hf vs. 147 Sm/ 144 Nd diagram for southern African lower-crustal xenoliths. Dashed lines indicate CHUR (chondritic uniform reservoir) values; field of continental crust and other xenolith data are from Vervoort et al. (2000) ...
FIGURES
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Journal Article
Ancient and juvenile components in the continental crust and mantle: Hf isotopes in zircon from Svecofennian magmatic rocks and rapakivi granites in Sweden
Journal: Lithosphere
Publisher: Geological Society of America
Published: 01 December 2011
Lithosphere (2011) 3 (6): 409-419.
... crust (<2.2–1.9 Ga) with a minor Archean component, from which later crustal magmas were generated. The Hf-isotope evolution curve for this crust can be approximated by ε Hf (1.90) = 3 ± 3 and 176 Lu/ 177 Hf = 0.018. Similarly, the present data, together with data for younger mafic intrusions, can...
FIGURES
Journal Article
Granitic magmatism by melting of juvenile continental crust: new constraints on the source of Palaeoproterozoic granitoids in Fennoscandia from Hf isotopes in zircon
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 March 2009
Journal of the Geological Society (2009) 166 (2): 233-247.
... a limited initial range, 176 Hf/ 177 Hf = 0.2816–0.2818, and define an evolutionary trend given by an initial value of ε Hf(1.88Ga) ≈ +2 ± 3 at an average 176 Lu/ 177 Hf = 0.015. These data show that a geographically extensive, long-lived, relatively homogeneous, and dominant magma source resided within 2.1...
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Journal Article
Dating the mantle roots of young continental crust
Journal: Geology
Publisher: Geological Society of America
Published: 01 April 2006
Geology (2006) 34 (4): 237-240.
...Figure 3. 176 Hf/ 177 Hf versus 176 Lu/ 177 Hf for northern French Massif Central mantle clinopyroxenes (cpx). Inset graph provides magnified view of Montboissier and Fraisse samples. Also shown is a 360 Ma reference isochron (dashed line) ...
FIGURES
Journal Article
Unique coesite-bearing zircon from allanite-bearing gneisses: U-Pb, REE and Lu-Hf properties and implications for the evolution of the Sulu UH P terrane, China
Journal: European Journal of Mineralogy
Published: 01 November 2009
European Journal of Mineralogy (2009) 21 (6): 1225-1250.
...Fig. 9. Relationship between 176 Lu/ 177 Hf and 176 Hf/ 177 Hf (t) , and 206 Pb/ 238 U age and εHf (t) values for the different domains in zircon from allanite-bearing paragneiss S27 and orthogneiss S28 in drill hole CCSD-PP2. (a) and (b) 176 Lu/ 177 Hf vs. 176 Hf/ 177 Hf(t) for zircon...
FIGURES
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