四川龙门山地区早中泥盆世孢子化石研究
发布时间：2018-11-03 16:31
【摘要】：本文系统研究了四川龙门山地区下泥盆统桂溪组、木耳厂组、观音庙组、关山坡组以及中泥盆统金宝石组的孢子化石,共鉴定孢子41属81种,建立了三个孢子组合带,由下至上分别是:Retusotriletes rotundus—Calamospora panucea(RP)孢子组合、Synorisporites downtoensis—Verrucosisporites scurrus(DS)孢子组合、Densosporites inaequus—Grandispora inculta(Ⅱ)孢子组合。通过与研究较为详细的西欧、北美地区的经典资料,包括老红砂岩大陆、北欧、加拿大等地区,以及国内相关资料的对比,结合特征种的地层分布、重要属种的含量、孢子大小等组合特征,确定RP组合时代为Lochkovian,DS组合时代为Pragian至早Emsian,Ⅱ组合时代为Eifelian中晚期—Givetian早期。这也是首次在金宝石组中发现孢子化石并对其进行研究。另外,通过对孢子直径的统计分析从另一个角度探讨了古植物的演化历程。
[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，
本文编号：2308322
[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，
本文编号：2308322
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