辽西燕辽生物群分布特征及新发现

发布时间：2018-04-07 15:30

本文选题：辽西　切入点：燕辽生物群　出处：《地质论评》2017年03期

【摘要】：我国辽宁省西部地区一直是中生代古生物化石的重要产地,近几年发现了大量的珍稀动植物化石,产生了重要的影响,但有一些化石的层位尚不明确。近三年来,笔者在辽宁西部葫芦岛建昌以及朝阳辖区下的朝阳县、凌源市以及建平县针对一套中侏罗世火山岩所夹的沉积岩地层进行了详细的化石调查工作。首先,根据髫髻山组地层出露条件,在金岭寺—羊山盆地的建昌县玲珑塔大西山村测制了髫髻山组主干剖面,除此之外还在大平房—梅勒营子盆地和凌源—三十家子盆地测制了辅助剖面,同时在剖面上逐层进行化石采集;之后研究本次工作采集的化石以及收集该地区燕辽生物群化石资料;最后将化石落到准确的层位之上,并将各盆地化石层进行对比。通过剖面的测制以及化石的挖掘和调查,确定其为中侏罗世髫髻山组,属燕辽生物群中期,确定了一批珍稀化石的产出层位,为了方便不同盆地化石层对比,本文命名了两个新的珍稀化石层位——大西山化石层和棺材山化石层,将化石与层位一一对应,并且完成了对辽西主要盆地化石层的对比;与之同时挖掘出了一批珍贵的动植物化石,丰富了燕辽生物群古生物的内容,为今后的研究提供了翔实的资料。
[Abstract]:The western part of Liaoning Province has always been an important source of Mesozoic paleontological fossils. In recent years, a large number of rare plant and animal fossils have been discovered, which have had an important effect, but the horizon of some fossils is still unclear.In the last three years, the authors have carried out a detailed fossil investigation of the sedimentary strata of a set of middle Jurassic volcanic rocks in Jianchang, Lingyuan and Jianping counties in Huludao, western Liaoning, and Chaoyang counties under the jurisdiction of Chaoyang.First, according to the stratigraphic exposure conditions of Tiaojishan formation, the main section of Tiaojishan formation was measured in Linglong Ta Daxishan Village, Jianchang County, Jinlingsi-Yangshan Basin.In addition, auxiliary sections were measured in Dafingfang-Maileyingzi basin and Lingyuan-30jiazi basin, and fossils were collected layer by layer on the section.The fossils collected in this work and the fossil data of Yanliao biota in this area are studied. Finally, the fossils are placed on the exact horizon and the fossil beds of each basin are compared.Through the survey of the profile and the excavation and investigation of the fossils, it is determined that the Tiaojishan formation of the Middle Jurassic belongs to the middle period of Yanliao biota, and the productive horizon of a number of rare fossils is determined in order to facilitate the comparison of fossil beds in different basins.In this paper, two new rare fossil beds, the Daxishan fossil bed and the coffin mountain fossil bed, are named. The fossils and beds are matched one by one, and the fossil beds in the main basins of western Liaoning are compared.At the same time, a number of precious fossils of flora and fauna were excavated, which enriched the contents of the paleontology of the Yanliao biota, and provided detailed data for future research.
【作者单位】：辽宁省地质勘查院;
【基金】：辽宁省化石资源保护管理局古生物化石资源调查采购项目(编号:LNZC20130900206)资助的成果
【分类号】：Q911

【相似文献】