摘要
豫西汝阳盆地蟒川组陆相地层发育大型恐龙等动物化石,含化石的蟒川组与上覆、下伏地层序列和时代存有争议。通过汝阳盆地陆相地层野外系统调查,厘定了含恐龙地层—沉积序列及时代归属。在汝阳盆地早白垩世九店组凝灰岩中获得锆石SHRIMP U-Pb年龄为133～130Ma,结合九店组—陈宅沟组—蟒川组地层序列、沉积特征和接触关系等,认为汝阳盆地恐龙动物群及其赋存地层时代为早白垩世晚期。
Located within the Ruyang Basin in Western Henan,the dinosaur-bearing stratum,named the Mangchuan Formation,and its geochronology were poorly studied up to now. On the basis of geological survey,stratigraphic sequences and geochronology,the dinosaur-bearing deposits was discussed in this paper. Based on the SHRIMP U-Pb dating （130~133 Ma） of the zircons from tuffs in the Early Cretaceous Jiudian Formation underlying the dinosaur-bearing stratum,and in combination with stratigraphic succession,deposits and contacts between lithological units,it is concluded that the dinosaur -bearing stratum and the biota should belong to the late period of Early Cretaceous.
出处
《地质论评》
CAS
CSCD
北大核心
2010年第2期161-173,共13页
Geological Review
基金
国家自然科学基金重点项目(编号90914003)
国家重点基础研究发展计划(编号2006CB70145)
河南省国土资源厅项目(编号2006-26414)
国家自然科学基金资助项目(编号40872017)
中国地质科学院地质研究所所长基金资助项目的成果
