Granitic perspectives on the generation and secular evolution of the continental crust
Kemp, A.I.S., and Hawkesworth, C.J. (2003) Granitic perspectives on the generation and secular evolution of the continental crust. In: The Crust. Treatise on Geochemistry, 3 . Elsevier, Amsterdam, Netherlands, pp. 349-410.
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Every geologist is acquainted with the principle of “uniformitarianism,” which holds that present-day processes are the key to those that operated in the past. But the extent this applies to the processes driving the growth and differentiation of the Earth's continental crust remains a matter of debate. Unlike its dense oceanic counterpart, which is recycled back into the mantle by subduction within 200 Ma, the continental crust comprises buoyant quartzofeldspathic materials and is difficult to destroy by subduction. The continental crust is, therefore, the principal record of how conditions on the Earth have changed, and how processes of crust generation have evolved through geological time. It preserves evidence of secular variation in crustal compositions, and thus the way in which the crust has formed throughout Earth's history. Exploring the nature and origin of these variations is the focus of this chapter.
|Item Type:||Book Chapter (Research - B1)|
The executive editors of this 10-volume set K.K.Turekian and H.D. Holland, while the volume editor is R.L. Rudnick.
|Deposited On:||10 Jul 2009 14:24|
|Last Modified:||13 Feb 2011 18:30|
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