资源调查与环境
資源調查與環境
자원조사여배경
RESOURCES SURVEY & ENVIRONMENT
2015年
2期
89-97
,共9页
临海浙江翼龙%长尾雁荡鸟%古生态环境%临海国家地质公园
臨海浙江翼龍%長尾雁盪鳥%古生態環境%臨海國傢地質公園
림해절강익룡%장미안탕조%고생태배경%림해국가지질공완
Zhej iangopterus linhaiensis%Yandangornis longicaudus%paleoecological environment%Lin-hai national geopark
临海浙江翼龙及长尾雁荡鸟化石赋存于浙东小雄盆地晚白垩世形成的地层中。通过对比化石骨骼结构及生态习性，结合对地质背景、古地理、古生态环境及化石产地剖面岩性岩相、沉积构造、化石赋存状态、古植物及孢粉组合等研究认为：小雄盆地继承了早白垩世晚期永康期陆相盆地的构造格局，晚白垩世小雄早期，盆地间分布众多残存的湖泊沼泽，它们是翼龙类和鸟类最后的栖息地。受间歇性火山喷发影响，空落相火山碎屑物导致的湖泊萎缩及沼泽化、水体酸化、气候干热等是造成生活在湖泊沼泽周边和翱翔于天空中的翼龙及鸟类集群死亡的主要因素。小雄中晚期，浙东地区经历了较大规模的酸性岩浆喷溢及火山喷发堆积，为临海国家地质公园流纹岩地貌演化奠定了物质基础。
臨海浙江翼龍及長尾雁盪鳥化石賦存于浙東小雄盆地晚白堊世形成的地層中。通過對比化石骨骼結構及生態習性，結閤對地質揹景、古地理、古生態環境及化石產地剖麵巖性巖相、沉積構造、化石賦存狀態、古植物及孢粉組閤等研究認為：小雄盆地繼承瞭早白堊世晚期永康期陸相盆地的構造格跼，晚白堊世小雄早期，盆地間分佈衆多殘存的湖泊沼澤，它們是翼龍類和鳥類最後的棲息地。受間歇性火山噴髮影響，空落相火山碎屑物導緻的湖泊萎縮及沼澤化、水體痠化、氣候榦熱等是造成生活在湖泊沼澤週邊和翱翔于天空中的翼龍及鳥類集群死亡的主要因素。小雄中晚期，浙東地區經歷瞭較大規模的痠性巖漿噴溢及火山噴髮堆積，為臨海國傢地質公園流紋巖地貌縯化奠定瞭物質基礎。
림해절강익룡급장미안탕조화석부존우절동소웅분지만백성세형성적지층중。통과대비화석골격결구급생태습성，결합대지질배경、고지리、고생태배경급화석산지부면암성암상、침적구조、화석부존상태、고식물급포분조합등연구인위：소웅분지계승료조백성세만기영강기륙상분지적구조격국，만백성세소웅조기，분지간분포음다잔존적호박소택，타문시익룡류화조류최후적서식지。수간헐성화산분발영향，공락상화산쇄설물도치적호박위축급소택화、수체산화、기후간열등시조성생활재호박소택주변화고상우천공중적익룡급조류집군사망적주요인소。소웅중만기，절동지구경력료교대규모적산성암장분일급화산분발퇴적，위림해국가지질공완류문암지모연화전정료물질기출。
Specimens of the pterosaur Zhej iangopterus linhaiensis and the birdYandangornis longicau-dus are found from upper Cretaceous strata in the Xiaoxiong basin in eastern Zhejiang Province.Having comprehensively analyzed these paleovertebrates’ossatures,occurrences and ecological behavior,com-bined with paleobotany,sporopollen assemblages,sedimentary,lithofacies,palaeogeographical and palae-oecological environments,as well as geologic background of their locality,it is considered that the Xiaox-iong basin inherited geological tectonic framework in Yongkang period during late period of early Creta-ceous,remnants of lakes and marshes spreaded all over the region,in where pterosaurs and birds living and multiplying during the early Xiaoxiong period of late Cretaceous.With intermittent volcanic erup-tions,pyroclastic material accumulating and dry hot climate,lakes and marshes shrank,the ecological en-vironmental degradation caused mass mortality of pterosaurs and birds.In mid-late Xiaoxiong period,a se-ries of large-scale acidic magmatic erupted and volcanic cinder piled,laying the foundations for evolution of rhyolite landform in Linhai national geopark.
