摘要
在塔里木盆地塔中地区志留系塔塔埃尔塔格组中共发现遗迹化石 11属 12种,包括Skolithoslinearis、Skolithosverticalis、Ophiomorphanodosa、Arenicolitesisp.、Cylindrichnusisp.、Thalassinoidessuevicus、Diplocraterionparallelum、Taenidi umsatanassi、Macaronichnussegregatis、Palaeophycustubularis、Planolitesbeverlegensis和Cochlichnusanguineus。这些遗迹化石主要是无脊椎动物的居住迹、进食迹和觅食迹,其中大部分呈全浮痕保存,少数呈上浮痕或下浮痕保存。按其古生态和沉积学特征,可划分出三个遗迹组合:①Skolithos-Thalassinoides遗迹组合,代表了平坦底型条件下的砂坪沉积环境;②Planolites-Palaeophycus遗迹组合,反映了潮间带砂泥坪沉积环境;③Cochlichnus-Planolites遗迹组合,代表了平均低潮线附近的泥坪沉积环境。
Trace fossils from the tidal flat Tataertage Formation (Silurian) consist of at least 12 ichnogenera and 12 ichnospecies, namely, Skolithos linearis, Skolithos verticalis, Ophiomorpha nodosa, Thalassinoides suevicus, Diplocraterion parallelum,Arenicolites isp., Macaronichnus segregatis, Cylindrichnus isp., Taenidium satanassi, Palaeophycus tubularis, Planolites beverlegensis andCochlichnus anguineus. These trace fossils, which are mainly preserved in full relief and epirelief, can be known as the domichnia, fodinichnia and pascichnia of invertebrates. According to their palaeoecological and sedimentological features, these trace fossils can be divided into 3 ichnoassemblags, i.e. ①Skolithos-Thalassinoidesassemblage, forming in the sand flat sedimentary environment, mainly consists of a set of Skolithos linearis, Thalassinoides suevicus, Macaronichnus segregatis,Diplocraterion parallelum,Arenicolitesisp., Cylindrichnus isp. and so on; ②Planolites-Palaeophycus assemblage, which is predominantly composed of Planolites beverlegensis, Palaeophycus tubularis, Macaronichnus segregatis, Skolithos verticalis, Ophiomorpha nodosa, Taenidium satanassiand so forth, is characterized by high diversity and abundanceof trace fossils. The ichnoassemblage is associated with the mixed flat between average high tidal and average low tidal base;③Cochlichnus-Planolites assemblage, including Cochlichnus anguineusand Planolites beverlegensis, occurs in the mud flat sedimentary environment near average low tidal base.
出处
《沉积学报》
CAS
CSCD
北大核心
2005年第1期91-99,共9页
Acta Sedimentologica Sinica
