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Figure 3

From: Mesoproterozoic juvenile crust in microcontinents of the Central Asian Orogenic Belt: evidence from oxygen and hafnium isotopes in zircon

Figure 3

Zircon Hf isotopic evolution diagram for the ca. 1.4 Ga Alatage amphibolite and granitic rocks. Also showing the Neoproterozoic granitic rocks from the CTM (Data sources: refs6,7,33,34,35,36,37,38,39,40). Note that the εHf(t) values of the Neoproterozoic granitic rocks are typically located in the crustal basement evolution region of the CTM as defined by the Mesoproterozoic rocks. The ‘crust evolution curve’ is based on the 176Lu/177Hf value of 0.0125 for average upper continental crust49.

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