摘要
燕山期环太平洋构造活动导致辽西频繁地火山喷发。巨星火山灰一次次覆盖火山周围丛林和湖沼．掩埋了各种生物，形成学术价值极高的化石库（fossillagerstatte），尤其是鸟类和昆虫化石及动物的毛发、羽毛、膜翅及内脏等软组织结构，都或多或少地以精细的碳化膜或印痕保存。特别是近年一系列新发现，如孔子鸟（Confucinsornis）和带毛的秀颌龙（Compsognathus）／中华龙鸟（Sinosauroteryx）等，引起国内外学术界的轰动。笔者研究了其中一批化石，从古生态和埋藏事件进行探讨认为：（1）该生物群代表分子中鹦鹉嘴龙（Psittacosaurus）、带毛秀颌龙／中华龙鸟及孔子鸟等，很可能是温血动物。（2）频繁的火山喷发不但将巨量的火山灰沉积在广大的湖泊丛林区，加快了其沼泽化的进程，对煤层及油页岩层的形成起了催化作用。
During late Jurassic-ear1y Cretaceous, volcanic eruptions in western Liaoning werecaused frequently by Yanshanian structural activities encircled the Pacific Ocean. Aconsiderable eruption resulted in the death of organisms in lakes and marshy jungles.Among them some corpses were buried in large volcanic ash soon while those corpseski1Ied by volcanic gas were reserved well in the lakes or marshes' When volcanoesremained dormant, the fertile volcanic ash made plants growing, as well as insects, birds,reptiles, amphibia, pisces and mollusca etc. prosperous' All the living things throve untilthc next eruption' In this way the circulation of volcanic eruption-buried organisms organisms thriving-volcanic eruption multiple fossiliferous tuffaceous bedsedohol FossilLargestatle was formed.In such a special condition, many organisms included some terrestrial animals - whichwere eaten up or weathered easily under normal conditions, such as insects and birds etc,are preservcd so well in fine tuffaccous sediments that the distinct prints of the tiny featherof a bird (as in Confuciusornis etc. ) or hair of an animal (as in CompsognathusSinosauropteryx etc. )or membranous of an insect (as in Ephempropsis and Chironomop risetc. ) can be seen clearly in the fossils'
出处
《火山地质与矿产》
1998年第2期159-168,共10页
Volcanology & Mineral Resources
关键词
热河群
化石库
古生态
埋藏事件
火山灰
中生代
Johol Group fossil lagerstatte palaeoecology taphonomic events Western Liaoning China
