【摘要】：本文系統(tǒng)研究了四川龍門山地區(qū)下泥盆統(tǒng)桂溪組、木耳廠組、觀音廟組、關山坡組以及中泥盆統(tǒng)金寶石組的孢子化石,共鑒定孢子41屬81種,建立了三個孢子組合帶,由下至上分別是:Retusotriletes rotundus—Calamospora panucea(RP)孢子組合、Synorisporites downtoensis—Verrucosisporites scurrus(DS)孢子組合、Densosporites inaequus—Grandispora inculta(Ⅱ)孢子組合。通過與研究較為詳細的西歐、北美地區(qū)的經(jīng)典資料,包括老紅砂巖大陸、北歐、加拿大等地區(qū),以及國內相關資料的對比,結合特征種的地層分布、重要屬種的含量、孢子大小等組合特征,確定RP組合時代為Lochkovian,DS組合時代為Pragian至早Emsian,Ⅱ組合時代為Eifelian中晚期—Givetian早期。這也是首次在金寶石組中發(fā)現(xiàn)孢子化石并對其進行研究。另外,通過對孢子直徑的統(tǒng)計分析從另一個角度探討了古植物的演化歷程。
[Abstract]:In this paper, the spore fossils of the Lower Devonian Guxi formation, Muerchang formation, Guanyinmiao formation, Guanshan formation and the Middle Devonian goldstone formation in Longmen Mountain area, Sichuan Province were systematically studied. A total of 41 genera and 81 species of spores were identified and three spore assemblages were established. From the bottom to the top are: Retusotriletes rotundus-Calamospora panucea (RP) spore assemblage, Synorisporites downtoensis-Verrucosisporites scurrus (DS) spore assemblage and Densosporites inaequus-Grandispora inculta (鈪，

本文編號：2308322