globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1512549112
论文题名:
Mid-Pleistocene climate transition drives net mass loss from rapidly uplifting St. Elias Mountains; Alaska
作者: 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.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2015
卷: 112, 期:49
起始页码: 15042
结束页码: 15047
语种: 英语
英文关键词: Mass flux ; Mid-Pleistocene transition ; Ocean drilling ; Orogenesis ; Tectonic-climate interactions
Scopus关键词: Article ; budget ; calibration ; chronology ; climate change ; drill ; human ; Middle Pleistocene ; Northern Hemisphere ; priority journal ; United States
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162347
Appears in Collections:气候变化与战略

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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, Appalachian State University, Boone, NC 28608, United States; Drab, L., Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States; Forwick, M., Department of Geology, Universitetet i Tromsø, Tromso, 9037, Norway; Fukumura, A., Department of Earth and Planetary Sciences, Nagoya University, Nagoya, 464-8601, Japan; Ge, S., Department of Marine Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China; Gupta, S., National Institute of Oceanography, Dona Paula, Goa, 403 004, India; Kioka, A., Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, 277-8564, Japan; Konno, S., Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, 812-8581, Japan; LeVay, L.J., International Ocean Discovery Program, Texas A and M University, College Station, TX 77845-9547, United States; Marz, C., School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; Matsuzaki, K.M., Department of Geology and Paleontology, Tohoku University, Sendai, 980-8578, Japan; McClymont, E.L., Department of Geography, University of Durham, Durham, DH1 3LE, United Kingdom; Moy, C., Department of Geology, University of Otago, Dunedin, 9054, New Zealand; Muller, J., Marine Geology and Paleontology, Alfred Wegener Institute, Bremerhaven, 27568, Germany; Nakamura, A., Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, 277-8564, Japan, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8567, Japan; Ojima, T., Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, 277-8564, Japan; Ribeiro, F.R., Departamento de Oceanografia Física Química e Geológica, Instituto Oceanográfico, Universidade de São Paulo, São Paulo, SP, 05508-120, Brazil; Ridgway, K.D., Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907-2051, United States; Romero, O.E., MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Slagle, A.L., Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, United States; Stoner, J.S., College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331-5503, United States; St-Onge, G., Institut des Sciences de la Mer de Rimouski, Université du Québec À Rimouski, Rimouski, QC G5L 3A1, Canada; Suto, I., Department of Earth and Planetary Sciences, Nagoya University, Nagoya, 464-8601, Japan; Walczak, M.D., Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia; Worthington, L.L., Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, United States; Bailey, I., Camborne School of Mines, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Penryn, Cornwall, TR10 9FE, United Kingdom; Enkelmann, E., Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, United States; Reece, R., Department of Geology and Geophysics, Texas A and M University, College Station, TX 77843-3115, United States; Swartz, J.M., Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78758-4445, United States

Recommended Citation:
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]. Proceedings of the National Academy of Sciences of the United States of America,2015-01-01,112(49)
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