豫西汝阳盆地九店组凝灰岩锆石SHRIMP U-Pb测年及其对含恐龙化石地层年代约束
예서여양분지구점조응회암고석SHRIMP U-Pb측년급기대함공룡화석지층년대약속
SHRIMP U-Pb Dating of Zircons form Tuffs of Lower Cretaceous Jiudian Formation in Ruyang Basin, Western Henan, and Constraint on Stratigraphic Sequences of Dinosaur Fossils-Bearing
  • 万方数据
    地质论评 지질론평
    GEOLOGICAL REVIEW
    2010年 2期 161-173 ,共13页

    江小均%柳永清%姬书安%张维%张兴辽%徐莉%贾松海%吕君昌%袁崇喜%李明

    강소균%류영청%희서안%장유%장흥료%서리%가송해%려군창%원숭희%리명

    豫西%汝阳盆地%下白垩统%地层%锆石SHRIMP U-Pb测年 豫西%汝暘盆地%下白堊統%地層%鋯石SHRIMP U-Pb測年
    예서%여양분지%하백성통%지층%고석SHRIMP U-Pb측년
    western Henan%Ruyang Basin%Early Cretaceous%stratigraphy%zircon SHRIMP U-Pb dating
    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133～130 Ma,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.
    예서여양분지망천조륙상지층발육대형공룡등동물화석,함화석적망천조여상복、하복지층서렬화시대존유쟁의.통과여양분지륙상지층야외계통조사,전정료함공룡지층-침적서렬급시대귀속.재여양분지조백성세구점조응회암중획득고석SHRIMP U-Pb년령위133～130 Ma,결합구점조-진택구조-망천조지층서렬、침적특정화접촉관계등,인위여양분지공룡동물군급기부존지층시대위조백성세만기.
    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.
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