Detrital zircon record and tectonic setting
Detrital zircon record and tectonic setting
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DOI：
10.1130/g32945.1
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发表时间：
2012-10-01
期刊：
影响因子：
5.8
通讯作者：
Dhuime, B.
中科院分区：
文献类型：
--
作者：
Cawood, P. A.;Hawkesworth, C. J.;Dhuime, B.
碎屑锆石光谱反映了沉积盆地的构造背景。会聚板块边缘的锆石年龄与沉积年龄相近，而碰撞、伸展和克拉通内的锆石年龄较大，反映了下伏基底的历史。这些差异可以通过绘制沉积物中单个锆石颗粒的结晶年龄（CA）与沉积年龄（DA）之间的差异分布图来解决。当盆地的原始性质和/或与物源的联系不再被保留时，将这种方法应用于序列，限制了沉积物沉积的构造环境。
Detrital zircon spectra reflect the tectonic setting of the basin in which they are deposited. Convergent plate margins are characterized by a large proportion of zircon ages close to the depositional age of the sediment, whereas sediments in collisional, extensional and intracratonic settings contain greater proportions with older ages that reflect the history of the underlying basement. These differences can be resolved by plotting the distribution of the difference between the measured crystallization ages (CA) of individual zircon grains present in the sediment and the depositional age (DA) of the sediment. Application of this approach to successions where the original nature of the basin and/or the link to source are no longer preserved constrains the tectonic setting in which the sediment was deposited.