摘要
对新疆塔里木盆地于奇地区钻孔中三叠纪泥岩孢粉的研究,以优势属建立了3个孢粉组合。下部Limatulasporites-Lundbladispora-Taeniaesporites组合产于柯吐尔组,蕨类植物孢子占优势成分,以具纹饰的三缝孢子及腔状三缝孢子为主,裸子植物花粉以具肋双气囊花粉为主,地质时代为早三叠世;中部Punctatisporites-Aratrisporites组合产于阿克库勒组,蕨类植物孢子以光面圆形三缝孢子和单缝孢类为优势成分,裸子植物花粉以无肋双气囊花粉为主,地质时代为中三叠世;上部Dictyophyllidites-Cyclogranisporites-Alisporites组合产于哈拉哈塘组,蕨类植物孢子常见光面三角形三缝孢子和具纹饰的三缝孢子,裸子植物花粉以无肋双气囊花粉为主,地质时代为晚三叠世。
According to the research of Triassic sporopollen assemblages in mudstones from the drll of Yuqi area in Tarim Basin, Sinkiang, three sporopollen fossil assemblages were identified by the dominant genera. The Limatulasporites - Lundbladispora - Taeniaesporites assemblage in the lower part, whose geological time is Early Triassic, is produced at the Ketu^r Formation, in which the dominant elements are the spores of fern that are predominated by trilete spores with ornamentations and cavity - shaped trilete spores. The pollen of gymnosperms is mainly double ballonet pollen with ribs. The Punctatisporites - Aratrisporites assemblage in the middle part, whose geological time is Middle Triassic, is produced at the Akekule Formation, in which the ferns are predominated by the glazed and rounded trilete spores and monolete spores, the pollen of gymnosperms are predominated by the double ballonet pollen with no ribs. The Dictyophyllidites - Cyclogranisporites- Alisporites assemblage in the upper part, whose geological time is Late Triassic, is produced at Halahatang Formation, in which the ferns are predominated by the glazed and triangular trilete spores and trilete spores with ornamentations, the pollen of gymnosperms are predominated by the double ballonet pollen with no ribs.
出处
《华南地质与矿产》
CAS
2007年第4期56-63,共8页
Geology and Mineral Resources of South China
关键词
三叠纪
孢粉
塔里木盆地
Triassic, sporopollen assemblages, Tarim Basin
