Stalagmite Trace Element and Its Implications from Yangzi Cave during 76~69 ka B.P.
doi: 10.14027/j.cnki.cjxb.2015.02.009
- Received Date: 2014-04-15
- Rev Recd Date: 2014-05-22
- Publish Date: 2015-04-10
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Key words:
- stalagmite /
- trace elements /
- Yangzi Cave /
- Three Gorges Reservoir
Abstract: Using Chongqing Fengdu Yangzi Cave Stalagmite Y02 ICP-MS dating data, trace element data and stalagmite oxygen isotope data reconstruct the paleoclimate and paleoenvironment of Chongqing area during 76~69ka BP periods. We have contrasted the stalagmite Y02 test data with the curve of local solar radiation, the Greenland NGRIP ice core, the surface temperature of south sea, and results show that: Mg/Ca in stalagmite response to changes in precipitation mainly, while Sr/Ca, Ba/Ca and U/Ca response to surface soil conditions and local atmospheric dust activities, and thus in response to changes in precipitation indirectly; oxygen isotope and trace elements not synchronous changes appeared in stalagmite Y02, stalagmite δ18O heavy trend appeared 1ka later than the trace element ratios increased, shows that the changes of trace element ratios also affected by temperature in stalagmite.
Citation: | LI ChenSi, YANG XunLin, HUANG Fan, LI GuoJun, LV ChunYan, YANG Yan. Stalagmite Trace Element and Its Implications from Yangzi Cave during 76~69 ka B.P.[J]. Acta Sedimentologica Sinica, 2015, 33(2): 299-305. doi: 10.14027/j.cnki.cjxb.2015.02.009 |