摘要
吐哈盆地南缘雅满苏西大沟剖面石炭系含有丰富的腕足动物化石,可划分为8个群落和1个搬运化石集合。个体生态、行为习性、营养结构的分析及岩性、岩相组合特征的研究表明:这些群落的生态位界于BA2和BA3之间,缺乏BA4和BA5较深水群落,说明该区石炭纪海水深度不超过60m。各群落自身演替的主要控制因素是生物之间的相互作用。各群落在时间上相互取代的主要控制因素为海水深度,与该区石炭纪4次明显的海水进退三级旋回密切相关,其中第二旋回的影响最为明显,并形成了白鱼山组顶部的不整合面。控制该区相对海平面变化的主要原因可能是石炭纪发生的4次构造运动,其次是全球海平面变化。
Abundant Carboniferous brachiopod fossils from the Xidagou section of Yamansu in the south margin of the Turpan-Hami basin were collected, and 8 communities and 1 transport fossil aggregate were recognized. According to a detailed study on individual morphology, ethology and nourishment structures, integrated with the analysis of lithology and sedimentary facies, the ecopositions of these communities distribute mainly between BA2 and BA3. In addition, no BA4 or BA5 community is found in the region, indicating the biggest depth of seawater under 60 m. The main factors, which dominate the existence and successions of these communities, are the seawater depth, substrata characteristics, hydropower intensities and frequent volcanoes. In Carboniferous, replacements of the communities are closely related to the 4 thirdorder cycles of sea level changes mainly controlled by the midHercynian Movement.
出处
《现代地质》
CAS
CSCD
2003年第3期243-250,共8页
Geoscience
基金
中国石油天然气股份有限公司"十五"重点科研项目"中国北方油气区石炭-二叠系划分对比
古环境研究及含油气远景评价"。
关键词
腕足动物
群落
海平面变化
石炭纪
雅满苏
吐哈盆地
brachiopod
community
sea level change
Carboniferous
Yamansu
the Turpan-Hami basin
