气候变化领域集成服务门户(CCPortal): Linking orogeny and orography in the Southern Alps of New Zealand: New observations from detrital fission-track thermochronology of the Waiho-1 borehole

CCPortal

DOI	10.1016/j.epsl.2020.116586
	Linking orogeny and orography in the Southern Alps of New Zealand: New observations from detrital fission-track thermochronology of the Waiho-1 borehole
	Lang K.A.; Glotzbach C.; Ring U.; Kamp P.J.J.; Ehlers T.A.
发表日期	2020
ISSN	0012821X
卷号	552
英文摘要	Numerical modeling coupling erosion with crustal deformation predicts that development of an orographic rain shadow may explain the asymmetric exhumation of convergent plate boundary orogens. This prediction is consistent with observations from the Southern Alps of New Zealand, where bedrock thermochronology indicates crustal exhumation has been concentrated along the wet, windward side of the mountains. While the spatial correspondence of exhumation and precipitation patterns is compelling, a robust evaluation of the link between orographic and orogenic processes further requires a temporal comparison between exhumation history, plate reconstructions and paleoclimatic records. We present a detailed exhumation history of the Southern Alps from detrital apatite and zircon fission-track thermochronology of the Waiho-1 borehole, a 3.6 km-thick sequence of proximal foreland basin sediments. Inverse thermal modeling of a 2062-grain dataset predicts two periods of rapid exhumation in the Early and Late Miocene. Rapid exhumation in the Early Miocene was synchronous with the development of transpression along the Alpine Fault and a ca. 20–22 Ma pulse of exhumation may reflect cooling during inversion of preexisting extensional basins. Rapid exhumation in the Late Miocene was not synchronous with a discrete change in plate convergence but increased exhumation rates after 7.4 Ma may instead reflect localization of plate boundary deformation along the Alpine Fault as orographic precipitation concentrated exhumation in the Alpine Fault hanging wall. We propose that, similar to prior interpretations from bedrock thermochronology, detrital thermochronology of the Southern Alps foreland basin is consistent with numerical model predictions linking asymmetric exhumation of the orogen to the growth of an orographic rain shadow. © 2020 Elsevier B.V.
关键词	detrital erosion exhumation Southern Alps tectonics thermochronology
英文关键词	Boreholes; Deformation; Faulting; Inverse problems; Numerical models; Phosphate minerals; Rain; Silicate minerals; Zircon; Convergent plate boundaries; Detrital thermochronology; Orographic precipitation; Orographic rain shadows; Paleoclimatic record; Plate reconstruction; Precipitation patterns; Zircon fission tracks; Fission reactions; borehole; computer simulation; crustal deformation; detrital deposit; exhumation; fission track dating; numerical model; orogeny; orography; plate convergence; tectonic reconstruction; tectonic setting; thermochronology; New Zealand; South Island; Southern Alps
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202716
作者单位	Department of Geological Sciences, Stockholm University, Stockholm, Sweden; Department of Geosciences, University of Tübingen, Tübingen, Germany; School of Science, The University of Waikato, Hamilton, New Zealand
推荐引用方式 GB/T 7714	Lang K.A.,Glotzbach C.,Ring U.,et al. Linking orogeny and orography in the Southern Alps of New Zealand: New observations from detrital fission-track thermochronology of the Waiho-1 borehole[J],2020,552.
APA	Lang K.A.,Glotzbach C.,Ring U.,Kamp P.J.J.,&Ehlers T.A..(2020).Linking orogeny and orography in the Southern Alps of New Zealand: New observations from detrital fission-track thermochronology of the Waiho-1 borehole.Earth and Planetary Science Letters,552.
MLA	Lang K.A.,et al."Linking orogeny and orography in the Southern Alps of New Zealand: New observations from detrital fission-track thermochronology of the Waiho-1 borehole".Earth and Planetary Science Letters 552(2020).