Independently dated paleomagnetic secular variation records from the Tibetan Plateau

Haberzettl, Torsten; Henkel, Karoline; Kasper, Thomas; Ahlborn, Marieke; Su, Youliang; Wang, Junbo; Appel, Erwin; St‐Onge, Guillaume; Stoner, J. S.; Daut, Gerhard; Zhu, Liping; Mäusbacher, Roland

doi:10.1016/j.epsl.2015.02.007

Cited by 36 publications

(39 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Located 2 km north of the piston coring position, the well‐investigated gravity core TAN10/4 (1.62 m length, 31°15.15′N, 86°43.37′E, 223 m water depth) exhibits a robust radiocarbon‐based chronology and highlights the potential of lacustrine sediments of Tangra Yumco for environmental and magnetic reconstructions [ Akita et al ., ; Haberzettl et al ., ]. Therefore, TAN10/4 was used to create a composite sediment profile because it has an undisturbed sediment‐water interface.…”

Section: Methodsmentioning

confidence: 99%

“…For the chronology of the composite profile consisting of gravity core TAN10/4 and piston core TAN12‐2, radiocarbon ages from gravity core TAN10/4 [ Haberzettl et al ., ] and piston core TAN12‐2 were combined. Bulk sediment samples were used for radiocarbon dating (Beta Analytic Inc., USA), as except for one piece of wood, no plant macro remains were available.…”

Section: Methodsmentioning

confidence: 99%

“…The terminal Lake Tangra Yumco (30°45′N–31°22′N, 86°23′E–86°49′E) with a surface area of 836 km 2 [ Akita et al ., ] and a maximum water depth of 230 m [ Haberzettl et al ., ] is one of the largest and the deepest lake on the Tibetan Plateau. The lake is located in an active N‐S trending graben structure [ Gao et al ., ] and consists of a shallower southern part (water depth >110 m) [ Wang et al ., ] and a much deeper northern one (230 m) with steep slopes and a flat central basin (Figure b).…”

Section: Site Decriptionmentioning

confidence: 99%

“…A similar approach only using inclination data was also used for a 800 year long sediment core from the small TT‐Lake [ Ahlborn et al ., ]. In addition, the application of inclination data for stratigraphic correlation was succesfully tested on several, individually radiocarbon‐dated gravity cores spanning the past 4000 years from Lakes Taro Co and Tangra Yumco (Figure a) [ Haberzettl et al ., ]. Although environmental magnetic studies of lacustrine sediments for longer time spans (i.e., the late Quaternary) are available [ Su et al ., ; Zhu et al ., ], no PSV records spanning the entire Late Glacial and Holocene have been published so far.…”

Section: Introductionmentioning

confidence: 99%

“…[], Taro Co— Haberzettl et al . [], and Tangra Yumco—this study. Underlying map was created using http://www.geomapapp.org.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

High‐resolution paleomagnetic and sedimentological investigations on the Tibetan Plateau for the past 16 ka cal B.P.—The Tangra Yumco record

Henkel

Haberzettl

St‐Onge

et al. 2016

Geochem Geophys Geosyst

Self Cite

View full text Add to dashboard Cite

The spatial distribution of paleomagnetic secular variation (PSV) records on the Tibetan Plateau and adjacent areas covering the Holocene and Late Glacial is sparse. In order to reconstruct PSV in this area, a piston core covering the past 17.5 ka cal B.P. retrieved from Lake Tangra Yumco, southern‐central Tibetan Plateau, was analyzed. In the laminated sediments, several event layers are intercalated. Those were identified by sedimentological analysis and excluded for age‐depth modeling and interpretation. Paleomagnetic measurements on u‐channels reveal two contrasting core sections. The lower section (dated to 17.5–15.9 ka cal B.P.) is very coarse grained (up to 220 µm) and characterized by low intensities (0.8 mA m−1) and high maximum angular deviation values (mean 25°), making it unsuitable for PSV reconstruction. In contrast, the upper unit (dated to <15.9 ka cal B.P.) yields ideal properties with a well‐defined magnetization carried by low‐coercivity minerals in the pseudo single domain state making those younger sediments a proper record for PSV studies. The robustness of the PSV reconstruction for the past 3000 years is highlighted by a comparable inclination and declination pattern of three short sediment cores (2 m) from Tangra Yumco. On a regional scale, the obtained inclination signal for the past 15.9 ka cal B.P. is in good agreement with the Lake Baikal record (3000 km to the North), PSV stack for East Asia, as well as with predictions of geomagnetic field models. This study is a step forward in constructing a PSV reference curve for central Asia.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Site Decriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[], Taro Co— Haberzettl et al . [], and Tangra Yumco—this study. Underlying map was created using http://www.geomapapp.org.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High‐resolution paleomagnetic and sedimentological investigations on the Tibetan Plateau for the past 16 ka cal B.P.—The Tangra Yumco record

Henkel

Haberzettl

St‐Onge

et al. 2016

Geochem Geophys Geosyst

Self Cite

View full text Add to dashboard Cite

show abstract

Ostracod‐based reconstruction of Late Quaternary lake level changes within the Tangra Yumco lake system (southern Tibetan Plateau)

Alivernini

Akita

Ahlborn

et al. 2018

J Quaternary Science

View full text Add to dashboard Cite

Tangra Yumco, a large saline lake located in the central-southern part of the Tibetan Plateau, lies in a hydrologically closed basin and is part of a cascade lake system including Tangqung Co, Tangra Yumco and Xuru Co. The extension and position of this lake system makes it valuable for reconstructing palaeoclimatic variations through the lake history and to compare both with the adjacent lake systems. We reconstructed Late Quaternary lake level changes based on data from two lacustrine sediment cores. A micropalaeontological analysis focusing on Ostracoda was carried out combined with dating ( 14 C, 210 Pb, 137 Cs), sedimentology and stable isotope data from bulk sediment. Ostracod analysis involves the quantitative documentation of associations. An ostracod-based transfer function for specific conductivity was applied to assess and refine lake level changes and to compare the results with other lake level reconstructions from the Tibetan Plateau for evaluating inter-regional climatic patterns. Seven ostracod species were detected, with Leucocytherella sinensis dominating the associations followed by Leucocythere? dorsotuberosa, Limnocythere inopinata and Tonnacypris gyirongensis. Fabaeformiscandona gyirongensis, Candona candida and Candona xizangensis were found in only a few samples and at low percentages. The synthesis of ostracod-based environmental reconstruction and chronology for samples from Tangra Yumco reveals the evolution of the lake system during the past 17 ka. A low lake level around 17 cal ka BP is followed by a recovering until the reaching of a high stand around 8-9 cal ka BP. Subsequently, between 7.7 and 2.5 cal ka BP, it remained relatively stable with a subsequent short-living lowstand-highstand cycle at around 2 ka. Thereafter, the ostracod-based conductivity transfer function shows an increase of conductivity corresponding to a lake level rising phase at around 0.4 ka. The recorded changes are indicators of past climatic conditions and refine the palaeoclimatic models in this area. Figure 2. Composite profile (without turbiditic layers) of the two cores with age-depth model and sedimentation rates as published by Henkel et al. (2016).

show abstract

Late quaternary hydrological changes at Tangra Yumco, Tibetan Plateau: a compound-specific isotope-based quantification of lake level changes

et al. 2016

View full text Add to dashboard Cite

Lake level fluctuations are important features in paleo-reconstructions that can be linked to past climate changes. Closed-basin lakes on the southcentral Tibetan Plateau record the balance between monsoonal precipitation and evaporative loss. To date, most studies provide only qualitative estimates of past hydrological changes. For the first time, we applied hydrogen isotopes (dD) of aquatic and terrestrial nalkanes to quantify lake volume changes of Tangra Yumco and compared values to newly calculated lake volumes of Nam Co. We also used carbon isotopes of sedimentary n-alkanes to reveal past climate and environmental conditions around the lake. The water volume of Tangra Yumco changed by 146 km3 in the past 17.42 cal ka. Lake volume increased in two steps, the first mainly initiated by glacial meltwater input after 16 cal ka BP, and to a minor extent by first strengthening of the Asian Summer Monsoon (ASM). The second increase was caused by intensified summer monsoon precipitation at 11.45 cal ka BP. After 8.0 cal ka BP, lake volume decreased because of arid conditions, until an increase at 0.8 cal ka BP that was probably linked to a wet spell during the Little Ice Age. The lake level changes of Tangra Yumco and Nam Co were affected simultaneously by the ASM, although their amplitudes differed because of different local conditions, such as basin morphology or the blocking effect of neighboring mountains, which influences the rainout of air masses and wind-induced evaporation

show abstract

Independently dated paleomagnetic secular variation records from the Tibetan Plateau

Cited by 36 publications

References 40 publications

High‐resolution paleomagnetic and sedimentological investigations on the Tibetan Plateau for the past 16 ka cal B.P.—The Tangra Yumco record

High‐resolution paleomagnetic and sedimentological investigations on the Tibetan Plateau for the past 16 ka cal B.P.—The Tangra Yumco record

Ostracod‐based reconstruction of Late Quaternary lake level changes within the Tangra Yumco lake system (southern Tibetan Plateau)

Late quaternary hydrological changes at Tangra Yumco, Tibetan Plateau: a compound-specific isotope-based quantification of lake level changes

Contact Info

Product

Resources

About