黃土高原平?jīng)龅貐^(qū)中全新世以來(lái)孢粉-植硅體記錄對(duì)比研究
[Abstract]:The pingliang profile (0 / 142 cm) located in Dazhai Village, Pingliang County, Gansu Province, was chronologically tested, sporopollen and phytolith analyzed. From the point of view of sporopollen, the climate of 8.50 Ka BP has experienced the process of cold-dry-cold-wet-cold-dry. From the point of view of silicon plant, the process of cool-wet-warm-wet (with the trend of becoming colder)-cool-wet-cold and dry is experienced. Four species of sporopollen (spruce, pine, gramineae, artemisia) with high content and typical environmental indication were compared with four types of silicones (fan type, rectangular type, rod type, pointed type). The results showed that the climate recorded by sporopollen was the same as that recorded by phytolith, but there were some differences. There is a good correspondence between the climate zone with abundant sporopollen content and the climate of plant silicon body, and the climate type reflected is more accurate. When the content of other pollen in sporopollen zone is very small and contains only a lot of pollens (such as pine genus), the climate and environment accuracy indicated by sporopollen is lower than that of other pollen bands with strong spreading ability and non-representative pollen (such as pine genus). In the loess plateau with less sporopollen content, phytolith is an effective palaeoclimate research method compared with sporopollen in the loess plateau with relatively high content of phytolith in the whole loess section and more accurate climatic characteristics of the reaction in the loess plateau where the sporopollen content is less than that in the loess plateau where the sporopollen content is less.
【作者單位】: 中國(guó)地質(zhì)科學(xué)院水文地質(zhì)環(huán)境地質(zhì)研究所;河北地質(zhì)大學(xué);
【基金】:中國(guó)地質(zhì)科學(xué)院基本科研業(yè)務(wù)費(fèi)項(xiàng)目(編號(hào):YWF201411;YYWF201627)資助~~
【分類號(hào)】:Q914
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