Uplift in the Fiordland Region, New Zealand: Implications for Incipient Subduction
Uplift in the Fiordland Region, New Zealand: Implications for Incipient Subduction
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DOI：
10.1126/science.1075328
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发表时间：
2002-09
期刊：
影响因子：
56.9
通讯作者：
M. House;M. Gurnis;P. Kamp;R. Sutherland
中科院分区：
文献类型：
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作者：
M. House;M. Gurnis;P. Kamp;R. Sutherland
低温时计揭示了新西兰峡湾地区晚新生代区域剥蚀作用，与地球动力学模型一致，表明上覆板块在早期俯冲过程中隆起。资料显示，随着俯冲开始向北迁移，发掘过程向北推进。最近隆起的位置与峡湾地区一个巨大的正布格重力异常相吻合。热时学推断的地壳变薄、异常重力和地表隆起的估计都与~ 2公里的动力支撑一致。这一动态支持量与地球动力学预测一致，表明我们已经确定了峡湾附近俯冲的起始时间。
Low-temperature thermochronometry reveals regional Late Cenozoic denudation in Fiordland, New Zealand, consistent with geodynamic models showing uplift of the overriding plate during incipient subduction. The data show a northward progression of exhumation in response to northward migration of the initiation of subduction. The locus of most recent uplift coincides with a large positive Bouguer gravity anomaly within Fiordland. Thermochronometrically deduced crustal thinning, anomalous gravity, and estimates of surface uplift are all consistent with ∼2 kilometers of dynamic support. This amount of dynamic support is in accord with geodynamic predictions, suggesting that we have dated the initiation of subduction adjacent to Fiordland.