Thermochronology in southeast Alaska and southwest Yukon: Implications for North American Plate response to terrane accretion
Thermochronology in southeast Alaska and southwest Yukon: Implications for North American Plate response to terrane accretion
复制标题
阿拉斯加东南部和育空地区西南部的热年代学:北美板块对地体增生反应的影响
DOI:
10.1016/j.epsl.2016.10.032
复制
发表时间:
2017
影响因子:
5.3
通讯作者:
Ehlers
中科院分区:
文献类型:
--
作者:
Enkelmann;Piestrzeniewicz;Falkowski;Stübner;Ehlers
This study presents the first comprehensive dataset of low-temperature thermochronology from 43 bedrock samples collected north of the active Yakutat–North American plate boundary. Our apatite and zircon (U–Th)/He and fission-track data reveal the cooling history of the inboard Wrangellia Composite Terrane that is dominated by rapid cooling after Late Jurassic to Early Cretaceous arc magmatism followed by very little cooling and exhumation until today. Deformation resulting in rock exhumation due to the collision of the Yakutat microplate is spatially very limited (20–30 km) and is concentrated mainly in the Chugach–Prince William Terrane and rocks near the Border Ranges Fault. Focused exhumation from greater depths of ca. 10 km with very high rates (>5 km/Myr) is localized at the syntaxis region, starting ca. 10 Ma and shifted south through time. The rapid exhumation rates are explained by the development of strong feedbacks between tectonically driven surface uplift and erosion, which started already before glaciation of the area. The shift in the location towards the south is a consequence of continuous readjusting between tectonics and climate, which is changing on local and global scales since the Late Miocene.
登录
查看更多内容
影响因子:
4.9
作者:
D. Gasser;D. Rubatto;E. Bruand;K. Stüwe
通讯作者:
K. Stüwe
影响因子:
4.2
作者:
Falkowski;Enkelmann;Pfänder;Stübner;Ehlers
通讯作者:
Ehlers
影响因子:
2.9
作者:
J. Spotila;Aaron Berger
通讯作者:
Aaron Berger
影响因子:
2.5
作者:
T. Pavlis;J. Chapman;R. Bruhn;K. Ridgway;L. Worthington;S. Gulick;J. Spotila
通讯作者:
J. Spotila
DOI:
10.1002/jgrf.20136
发表时间:
2013-09
期刊:
Journal of Geophysical Research: Earth Surface
影响因子:
--
作者:
D. Grabowski;E. Enkelmann;T. Ehlers
通讯作者:
D. Grabowski;E. Enkelmann;T. Ehlers