Citation: | GAO Yuan, ZHOU Ye-ze, QIN Tian, HOU Hong-xing, PEI Yang, KOU Fu-jian, YAN Bo. SPOROPOLLEN ASSEMBLAGE OF BLACK SOIL SECTION IN EASTERN LIAOHE PLAIN: Age and Paleoclimatic Implication[J]. Geology and Resources, 2024, 33(5): 617-625. doi: 10.13686/j.cnki.dzyzy.2024.05.001 |
By analysis of sporopollen in 0-1 m black soil profile PM25 in eastern Liaohe Plain, the fossils are divided into two sporopollen assemblages from bottom to top according to the sporopollen content change. The PM25-1 sporopollen assemblage is mainly Spiraea-Artemisia-Sanguisorba-Rosa-Echinate Asteraceae, with the climate changing from cold-dry to warm-wet; while the PM25-2 sporopollen assemblage is dominated by Pinus-Cyperaceae-Chenopodium, indicating the transition of climate from warm-wet to cold-dry. Combined with the 14C dating data, it is concluded that the black soil in eastern Liaohe Plain was mainly formed in Medieval Warm Period since 1335 a B.P.
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Location map of natural black soil profile PM25 in Lishu area
Plates of sporopollen fossils from black soil profile PM25 in Lishu area
Sporopollen contents of natural black soil profile PM25 in Lishu area
Depth vs. age diagram of black soil profile in Lishu area
Paleoclimate evolution revealed by sporopollen
Line chart showing the oxide contents and correlation coefficient change of black soil profile PM25