气候变化领域集成服务门户(CCPortal): Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska

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DOI	10.1073/pnas.1512549112
	Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska
	Gulick S.P.S.; Jaeger J.M.; Mix A.C.; Asahi H.; Bahlburg H.; Belanger C.L.; Berbel G.B.B.; Childress L.; Cowan E.; Drab L.; Forwick M.; Fukumura A.; Ge S.; Gupta S.; Kioka A.; Konno S.; LeVay L.J.; Marz C.; Matsuzaki K.M.; McClymont E.L.; Moy C.; Muller J.; Nakamura A.; Ojima T.; Ribeiro F.R.; Ridgway K.D.; Romero O.E.; Slagle A.L.; Stoner J.S.; St-Onge G.; Suto I.; Walczak M.D.; Worthington L.L.; Bailey I.; Enkelmann E.; Reece R.; Swartz J.M.
发表日期	2015
ISSN	0027-8424
起始页码	15042
结束页码	15047
卷号	112 期号:49
英文摘要	Erosion, sediment production, and routing on a tectonically active continental margin reflect both tectonic and climatic processes; partitioning the relative importance of these processes remains controversial. Gulf of Alaska contains a preserved sedimentary record of the Yakutat Terrane collision with North America. Because tectonic convergence in the coastal St. Elias orogen has been roughly constant for 6 My, variations in its eroded sediments preserved in the offshore Surveyor Fan constrain a budget of tectonic material influx, erosion, and sediment output. Seismically imaged sediment volumes calibrated with chronologies derived from Integrated Ocean Drilling Program boreholes show that erosion accelerated in response to Northern Hemisphere glacial intensification (∼2.7 Ma) and that the 900-km-long Surveyor Channel inception appears to correlate with this event. However, tectonic influx exceeded integrated sediment efflux over the interval 2.8-1.2 Ma. Volumetric erosion accelerated following the onset of quasi-periodic (∼100-ky) glacial cycles in the mid-Pleistocene climate transition (1.2-0.7 Ma). Since then, erosion and transport of material out of the orogen has outpaced tectonic influx by 50-80%. Such a rapid net mass loss explains apparent increases in exhumation rates inferred onshore from exposure dates and mapped out-of-sequence fault patterns. The 1.2-My mass budget imbalance must relax back toward equilibrium in balance with tectonic influx over the timescale of orogenic wedge response (millions of years). The St. Elias Range provides a key example of how active orogenic systems respond to transient mass fluxes, and of the possible influence of climate-driven erosive processes that diverge from equilibrium on the million-year scale.
英文关键词	Mass flux; Mid-Pleistocene transition; Ocean drilling; Orogenesis; Tectonic-climate interactions
语种	英语
scopus关键词	Article; budget; calibration; chronology; climate change; drill; human; Middle Pleistocene; Northern Hemisphere; priority journal; United States
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159084
作者单位	Gulick, S.P.S., Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78758-4445, United States; Jaeger, J.M., Department of Geological Sciences, University of Florida, Gainesville, FL 32611-2120, United States; Mix, A.C., College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331-5503, United States; Asahi, H., Korea Polar Research Institute, Incheon, 406-840, South Korea; Bahlburg, H., Institut für Geologie und Paläontologie, Universität Münster, Muenster, 48149, Germany; Belanger, C.L., Department of Geology and Geological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701, United States; Berbel, G.B.B., Departamento de Oceanografia Física Química e Geológica, Instituto Oceanográfico, Universidade de São Paulo, São Paulo, SP, 05508-120, Brazil; Childress, L., Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL 60208, United States; Cowan, E., Department of Geology, ...
推荐引用方式 GB/T 7714	Gulick S.P.S.,Jaeger J.M.,Mix A.C.,et al. Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska[J],2015,112(49).
APA	Gulick S.P.S..,Jaeger J.M..,Mix A.C..,Asahi H..,Bahlburg H..,...&Swartz J.M..(2015).Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska.Proceedings of the National Academy of Sciences of the United States of America,112(49).
MLA	Gulick S.P.S.,et al."Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska".Proceedings of the National Academy of Sciences of the United States of America 112.49(2015).