本文選題：臨滄　切入點(diǎn)：晚中新世　出處：《蘭州大學(xué)》2015年碩士論文

【摘要】：云南省是我國目前被子植物最發(fā)育的區(qū)域之一,其植物多樣性豐富,植物區(qū)系演化頻繁。同時(shí),也是各時(shí)代植物化石最為豐富的地區(qū)之一。因此,云南省成為了古植物學(xué)家開展專業(yè)研究的最有利場(chǎng)所。臨滄市位于云南省西南邊陲。該區(qū)地貌多為山間盆地,地層發(fā)育良好,出露齊全,保存著豐富的被子植物化石,是研究我國新生代被子植物的一個(gè)重要場(chǎng)所。本文鑒定并描述了采自云南臨滄上中新統(tǒng)邦賣組的25塊槭屬(Acer)印痕,將其鑒定為4個(gè)種,其中包括1個(gè)新種和1個(gè)相似種,分別為Acer lincangense sp.nov.和Acer cf.jingdongense.槭屬化石在邦賣組出現(xiàn),反應(yīng)了該植物群屬于北溫帶和古熱帶混生氣候特征。通過對(duì)槭屬化石記錄以及現(xiàn)生種的統(tǒng)計(jì),不僅得到槭屬的地史多樣性演化表現(xiàn)為3個(gè)階段和3個(gè)發(fā)展高峰:依次為始新世、中新世和全新世,而且隨著時(shí)間的推移呈現(xiàn)一種螺旋式遞增的趨勢(shì)。亦可表明槭屬的生長環(huán)境主要為北溫帶地區(qū)或亞熱帶山區(qū)。本文還對(duì)采集于邦賣組的357塊被子植物的葉片化石做了系統(tǒng)的形態(tài)分類,將其分為39種形態(tài)型,做了 LMA分析,恢復(fù)出云南臨滄晚中新世年均溫MAT≈18.9℃。然后在39個(gè)形態(tài)型中選取30種葉相比較穩(wěn)定的形態(tài)型作為CLAMP賦值的對(duì)象,繼而將賦值結(jié)果運(yùn)用到CLAMP在線分析和傳統(tǒng)軟件分析,得出云南臨滄晚中新世的11種氣候參量,如年均溫MAT為18.19土 1.25℃、降雨量GSP為1441.5±217.7mm等。最后將其與現(xiàn)代氣候參量對(duì)比,發(fā)現(xiàn)云南臨滄晚中新世比現(xiàn)代較溫暖濕潤,氣候類型仍然屬于亞熱帶氣候。符合槭屬的生長環(huán)境。
[Abstract]:Yunnan Province is one of the most developed angiosperm regions in China, with abundant plant diversity and frequent floristic evolution. At the same time, it is also one of the most abundant areas of plant fossils in all ages. Yunnan Province has become the most favorable place for paleobotanists to carry out professional research. Linchang City is located in the southwest border of Yunnan Province. The landforms in this area are mostly mountain basins, with well-developed strata, complete exposure, and abundant fossil angiosperms. It is an important place to study the Cenozoic angiosperms in China. In this paper, 25 Acer (Acer) imprints collected from the Miocene Pangming formation in Lincang, Yunnan were identified and identified into 4 species, including one new species and one similar species. Acer lincangense sp.nov. and Acer cf.jingdongense. respectively. The fossils of Acer (Acer) are found in the Bangshang Group, reflecting the mixed climatic characteristics of the genus Acer, which belongs to the northern temperate zone and the paleotropics. The fossil records of Acer and the present species are analyzed. Not only did the geo-historical diversity of Acer show three stages and three peaks of development: Eocene, Miocene and Holocene, respectively. It also shows that the growth environment of Acer is mainly in the north temperate zone or the subtropical mountain area. The leaf fossils of 357 angiosperms collected from Bouncein Group are also studied in this paper. A systematic morphological classification has been done. It was divided into 39 morphological types, and was analyzed by LMA, and the average annual temperature of MAT 鈮，

本文編號(hào)：1655490