Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2010GC003084 |
A geologically constrained Monte Carlo approach to modeling exposure ages from profiles of cosmogenic nuclides: An example from Lees Ferry, Arizona | |
Hidy, Alan J.1; Gosse, John C.1; Pederson, Joel L.2; Mattern, Jann Paul3; Finkel, Robert C.4,5 | |
通讯作者 | Hidy, Alan J. |
来源期刊 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
![]() |
ISSN | 1525-2027 |
出版年 | 2010 |
卷号 | 11 |
英文摘要 | We present a user-friendly and versatile Monte Carlo simulator for modeling profiles of in situ terrestrial cosmogenic nuclides (TCNs). Our program (available online at http://geochronology.earthsciences.dal.ca/downloads-models.html) permits the incorporation of site-specific geologic knowledge to calculate most probable values for exposure age, erosion rate, and inherited nuclide concentration while providing a rigorous treatment of their uncertainties. The simulator is demonstrated with Be-10 data from a fluvial terrace at Lees Ferry, Arizona. Interpreted constraints on erosion, based on local soil properties and terrace morphology, yield a most probable exposure age and inheritance of 83.9(-14.1)(+19.1) ka, and 9.49(-2.52)(+1.21) x 10(4) atoms g(-1), respectively (2 sigma). Without the ability to apply some constraint to either erosion rate or age, shallow depth profiles of any cosmogenic nuclide (except for nuclides produced via thermal and epithermal neutron capture, e. g., Cl-36) cannot be optimized to resolve either parameter. Contrasting simulations of Be-10 data from both sand-and pebble-sized clasts within the same deposit indicate grain size can significantly affect the ability to model ages with TCN depth profiles and, when possible, sand-not pebbles-should be used for depth profile exposure dating. |
英文关键词 | Be-10 desert pavement TCN Grand Canyon alluvial fan active tectonics |
类型 | Article |
语种 | 英语 |
国家 | Canada ; USA ; France |
收录类别 | SCI-E |
WOS记录号 | WOS:000281572200001 |
WOS关键词 | PRODUCTION-RATES ; EROSION RATES ; BE-10 ; TERRACES ; AL-26 ; RIVER ; TIME ; RADIONUCLIDES ; INHERITANCE ; INCISION |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | University of California, Berkeley |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/164262 |
作者单位 | 1.Dalhousie Univ, Dept Earth Sci, Halifax, NS B3H 4R2, Canada; 2.Utah State Univ, Dept Geol, Logan, UT 84322 USA; 3.Dalhousie Univ, Dept Math & Stat, Halifax, NS B3H 3J5, Canada; 4.Univ Calif Berkeley, Earth & Planetary Sci Dept, Berkeley, CA 94720 USA; 5.CEREGE, Europole Mediterran Arbois, F-13545 Aix En Provence 4, France |
推荐引用方式 GB/T 7714 | Hidy, Alan J.,Gosse, John C.,Pederson, Joel L.,et al. A geologically constrained Monte Carlo approach to modeling exposure ages from profiles of cosmogenic nuclides: An example from Lees Ferry, Arizona[J]. University of California, Berkeley,2010,11. |
APA | Hidy, Alan J.,Gosse, John C.,Pederson, Joel L.,Mattern, Jann Paul,&Finkel, Robert C..(2010).A geologically constrained Monte Carlo approach to modeling exposure ages from profiles of cosmogenic nuclides: An example from Lees Ferry, Arizona.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,11. |
MLA | Hidy, Alan J.,et al."A geologically constrained Monte Carlo approach to modeling exposure ages from profiles of cosmogenic nuclides: An example from Lees Ferry, Arizona".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 11(2010). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。