Miocene to Pleistocene floras and climate of the Eastern Himalayan Siwaliks, and new palaeoelevation estimates for the Namling-Oiyug Basin, Tibet
文献类型：期刊论文
| 作者 | Khan, Mahasin Ali; Spicer, Robert A.; Bera, Subir; Ghosh, Ruby3; Yang, Jian; Spicer, Teresa E. V.; Guo, Shuang-xing; Su, Tao5; Jacques, Frederic5; Grote, Paul J. |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2014 |
| 卷号 | 113页码:1-10 |
| 关键词 | Neogene India Tibet Monsoon Palaeoelevation Climate change |
| ISSN号 | 0921-8181 |
| DOI | 10.1016/j.gloplacha.2013.12.003 |
| 文献子类 | Article |
| 英文摘要 | Four fossil floras ranging in age from the mid Miocene to the early Pleistocene from the eastern Siwaliks near Darjeeling and in Arunachal Pradesh (AP) were compared taxonomically and subjected to a CLAMP (Climate Leaf Analysis Multivariate Program) analysis using a new calibration dataset that includes sites from India, southern China and Thailand and high resolution gridded climate data. Two lower Siwalik mid Miocene floras yielded almost the same values suggesting mean annual temperatures (MATs) of 25.4 and 25.3 degrees C +/- 2.8 degrees C (all uncertainties +/- 2 sigma) with warm month mean temperatures (WMMTs) of 28.4 and 27.8 +/- 3.39 degrees C and cold month mean temperatures (CMMTs) of 17.9 and 21.3 +/- 4 degrees C. Precipitation estimates have high uncertainties but suggest a weak monsoon with growing season precipitations of 242 +/- 92 cm for Darjeeling and 174 +/- 92 cm for AP. Leaves from the middle Siwalik (Pliocene) sediments of AP indicate a lowering of the MAT to 23.7 degrees C, a function of cooler winter months (CMMT 16.9 degrees C). The AP early Pleistocene temperatures and rainfall were similar to those of the mid Miocene. Changes in the monsoon index suggest that in the AP area there has been little change in the intensity of the monsoon since mid Miocene time, while further west at Darjeeling there has been an intensification since the mid Miocene. Mid Miocene CLAMP-derived enthalpy estimates provide sea level (<200 a.m.s.l.) data for a re-evaluation of the palaeoelevation of a 15 Ma flora from the Namling-Oiyug Basin, southern Tibet. Enthalpy values from Darjeeling and AP were 354.1 and 355.8 +/- 10.3 kJ/kg respectively, while that derived from the Namling-Oiyug flora was 296.3 kJ/kg. This yields a palaeoelevation of 5888 m for the Namling site using the Darjeeling enthalpy estimate as a sea level datum and 6065 m using the AP assemblage. The combined uncertainty is +/- 728 m. Model corrected enthalpy trends at sea level across palaeolatitude and longitude reduce the mean elevation to 5.54 km. These elevations are higher than earlier estimates from the same site (but within uncertainty) and the corrected mean is similar to 1 km higher than the present day basin floor elevation in the region, suggesting some deflation since 15 Ma associated with east-west extension, particularly if a shift in the locus of deformation and uplift south to the Himalayas in post middle Miocene times relieved N-S compressional stress on southern Tibet. (C) 2013 Elsevier B.V. All rights reserved. |
| 学科主题 | Geography, Physical ; Geosciences, Multidisciplinary |
| 出版地 | AMSTERDAM |
| 电子版国际标准刊号 | 1872-6364 |
| WOS关键词 | LOWER CRUSTAL FLOW ; SOUTHERN TIBET ; SUBANSIRI DISTRICT ; ARUNACHAL-PRADESH ; UPLIFT ; TECTONICS ; EXTRUSION ; EVOLUTION ; MONSOON ; PALEOALTIMETRY |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000331500600001 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Chinese Academy of Sciences [2009S1-20, XDB03010103] ; International S & T Cooperation Project of China [2009DFA32210] ; University of Kolkata ; National Natural Science Foundation of China [41030212, 41272007] ; Department of Science and Technology, New Delhi |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/27026]  |
| 专题 | 植物研究所_系统与进化植物学研究中心_系统与进化植物学研究中心_学位论文 |
| 作者单位 | 1.Univ Calcutta, Ctr Adv Study, Kolkata 700019, W Bengal, India 2.Spicer, Robert A.] Open Univ, Ctr Earth Planetary Space & Astron Res, Milton Keynes MK7 6AA, Bucks, England 3.Spicer, Robert A.; Yang, Jian; Spicer, Teresa E. V.] Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 4.Birbal Sahni Inst Paleobot, Lucknow 226007, Uttar Pradesh, India 5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Dept Palaeobot & Palynol, Nanjing 210008, Jiangsu, Peoples R China 6.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Peoples R China 7.Grote, Paul J.] Suranaree Univ Technol, Sch Biol, Inst Sci, Nakhon Ratchasima 30000, Thailand |
| 推荐引用方式 GB/T 7714 | Khan, Mahasin Ali,Spicer, Robert A.,Bera, Subir,et al. Miocene to Pleistocene floras and climate of the Eastern Himalayan Siwaliks, and new palaeoelevation estimates for the Namling-Oiyug Basin, Tibet[J]. GLOBAL AND PLANETARY CHANGE,2014,113:1-10. |
| APA | Khan, Mahasin Ali.,Spicer, Robert A..,Bera, Subir.,Ghosh, Ruby.,Yang, Jian.,...&Grote, Paul J..(2014).Miocene to Pleistocene floras and climate of the Eastern Himalayan Siwaliks, and new palaeoelevation estimates for the Namling-Oiyug Basin, Tibet.GLOBAL AND PLANETARY CHANGE,113,1-10. |
| MLA | Khan, Mahasin Ali,et al."Miocene to Pleistocene floras and climate of the Eastern Himalayan Siwaliks, and new palaeoelevation estimates for the Namling-Oiyug Basin, Tibet".GLOBAL AND PLANETARY CHANGE 113(2014):1-10. |
入库方式： OAI收割
来源：植物研究所
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