Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2113/gssajg.110.2-3.235 |
Present denudation rates at selected sections of the South African escarpment and the elevated continental interior based on cosmogenic He-3 and Ne-21 | |
Kounov, A.; Niedermann, S.; de Wit, M. J.; Viola, G.; Andreoli, M.; Erzinger, J. | |
通讯作者 | Kounov, A. |
来源期刊 | SOUTH AFRICAN JOURNAL OF GEOLOGY |
ISSN | 1012-0750 |
EISSN | 1996-8590 |
出版年 | 2007 |
卷号 | 110期号:2-3页码:235-248 |
英文摘要 | Measurements of cosmogenic He-3 and Ne-21 concentrations in dolerite and quartzite samples front selected sites across the South African coastal escarpment and the interior plateau provide valuable estimates of the short-term (i.e., a few hundred thousand years) denudation rates. Present-day denudation rates at the summit of the escarpment and on the inland plateau are more than an order of magnitude lower than those in the Cretaceous. Values between 1.0 and 2.1 m/Ma obtained from resistant quartzite samples and between 1.5 and 3 m/Ma from dolerite sills suggest a strong lithology control on the erosion. The observed patterns of denudation across different landform sites on the high plateau and along its flanking escarpment suggest that the morphology of the sampling sites together with the local climate conditions have controlled the denudation processes. |
类型 | Article |
语种 | 英语 |
国家 | South Africa ; Switzerland ; Germany ; Norway |
收录类别 | SCI-E |
WOS记录号 | WOS:000251101600010 |
WOS关键词 | FISSION-TRACK THERMOCHRONOLOGY ; PASSIVE MARGIN DENUDATION ; DRAKENSBERG ESCARPMENT ; TERRESTRIAL ROCKS ; GEOMAGNETIC-FIELD ; EXPOSURE AGES ; DRAKE PASSAGE ; NAMIB DESERT ; NOBLE-GAS ; LANDSCAPE |
WOS类目 | Geology |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/156061 |
作者单位 | (1)Univ Cape Town, Dept Geol Sci, ZA-7701 Rondebosch, South Africa;(2)Univ Basel, Inst Geol Palaontol, CH-4056 Basel, Switzerland;(3)Geoforschungszentrum Potsdam, D-14473 Potsdam, Germany;(4)Univ Cape Town, Dept Geol Sci, AEON, ZA-7701 Rondebosch, South Africa;(5)Geol Survey Norway, N-7491 Trondheim, Norway;(6)S African Nucl Energy Corp, ZA-0001 Pretoria, South Africa;(7)Univ Witwatersrand, Sch Geosci, ZA-2050 Wits, South Africa |
推荐引用方式 GB/T 7714 | Kounov, A.,Niedermann, S.,de Wit, M. J.,et al. Present denudation rates at selected sections of the South African escarpment and the elevated continental interior based on cosmogenic He-3 and Ne-21[J],2007,110(2-3):235-248. |
APA | Kounov, A.,Niedermann, S.,de Wit, M. J.,Viola, G.,Andreoli, M.,&Erzinger, J..(2007).Present denudation rates at selected sections of the South African escarpment and the elevated continental interior based on cosmogenic He-3 and Ne-21.SOUTH AFRICAN JOURNAL OF GEOLOGY,110(2-3),235-248. |
MLA | Kounov, A.,et al."Present denudation rates at selected sections of the South African escarpment and the elevated continental interior based on cosmogenic He-3 and Ne-21".SOUTH AFRICAN JOURNAL OF GEOLOGY 110.2-3(2007):235-248. |
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