Arid
DOI10.1007/s10933-014-9816-0
A comment on Lai et al. (2014) concerning the origin of the Shell Bar section from the Qaidam Basin, NE Tibetan Plateau: lake formation versus river channel deposit, and C-14 versus OSL dates
Zhang, Hucai
通讯作者Zhang, Hucai
来源期刊JOURNAL OF PALEOLIMNOLOGY
ISSN0921-2728
EISSN1573-0417
出版年2015
卷号53期号:3页码:321-334
英文摘要

Without understanding the true meaning of why it is called Shell Bar, and ignoring the unreliability of OSL dating and the data of Fan (2009), Lai et al. (J Paleolimnol 51:197-210, 2014) concluded that the upper part of the Shell Bar section from Qaidam Basin, which they call the SB section, was formed during MIS5 (113-99 ka). This is at odds with Zhang et al. (Quat Sci 27:427-436, 2007a, Radiocarbon 50:255-265, 2008b) who argued that the whole 260-cm section accumulated between 39.7 and 17.5 C-14 ka BP. Using grain-size data and ostracod assemblages, they further asserted that the elevated sediments of the Shell Bar were stream deposits (Mischke et al. in J Paleolimnol 51:179-195, 2014) and support their conclusion using a nearby section they call the SSB section. This section, we believe, is old, fluvial-alluvial and shallow-water sediments, interbedded with eolian deposits, and its cliff-like appearance can be attributed to backward erosion processes during a high-water stand. All the OSL measurements used to date the section were produced at one laboratory, and the results are at odds with their conclusions. It is impossible for Lai et al. (J Paleolimnol 51:197-210, 2014) to ignore the AMS C-14 dates and rely fully on their OSL ages, which are not constrained or verified by other dating techniques. For the sedimentation and geomorphologic processes to be fully understood, we must have a solid understanding of the paleoclimatic and paleoenvironmental changes, and paleolake evolution, reconstructed using lake deposits, geomorphologic features, microfossil and macrofossils, pollen and other environmental variables.


英文关键词Age Shell Bar Qaidam Basin AMS C-14 dating OSL age
类型Editorial Material
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000349971500005
WOS关键词TENGGER DESERT ; CLIMATE INSTABILITY ; HUANGQIHAI LAKE ; INNER-MONGOLIA ; GOBI DESERT ; EVOLUTION ; PALEOCLIMATE ; CONSTRAINTS ; CHRONOLOGY ; CHINA
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS研究方向Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188893
作者单位(1)Yunnan Normal Univ, Coll Tourism & Geog Sci, Key Lab Plateau Lake Ecol & Global Change, Chenggong 650500, Kunming, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Hucai. A comment on Lai et al. (2014) concerning the origin of the Shell Bar section from the Qaidam Basin, NE Tibetan Plateau: lake formation versus river channel deposit, and C-14 versus OSL dates[J],2015,53(3):321-334.
APA Zhang, Hucai.(2015).A comment on Lai et al. (2014) concerning the origin of the Shell Bar section from the Qaidam Basin, NE Tibetan Plateau: lake formation versus river channel deposit, and C-14 versus OSL dates.JOURNAL OF PALEOLIMNOLOGY,53(3),321-334.
MLA Zhang, Hucai."A comment on Lai et al. (2014) concerning the origin of the Shell Bar section from the Qaidam Basin, NE Tibetan Plateau: lake formation versus river channel deposit, and C-14 versus OSL dates".JOURNAL OF PALEOLIMNOLOGY 53.3(2015):321-334.
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