吉林地质
吉林地質
길임지질
JILIN GEOLOGY
2012年
2期
1-6
,共6页
张应明%吕晓瑜%侯静%马维%王然%潘四江
張應明%呂曉瑜%侯靜%馬維%王然%潘四江
장응명%려효유%후정%마유%왕연%반사강
张家口组与义县组%侏罗纪与白垩纪界线%化石组合和同位素年龄%辽西地区
張傢口組與義縣組%侏囉紀與白堊紀界線%化石組閤和同位素年齡%遼西地區
장가구조여의현조%주라기여백성기계선%화석조합화동위소년령%료서지구
Zhangjiakou Formation and the Yixian Formation%boundary of Jurassic and Cretaceous%fossils combination and isotopic age%western part of Liaoning Province
本文介绍了辽西中生代土城组、张家口组、义县组地层特征、化石组合。通过岩石地层、生物地层、同位素年代学研究,并在宁城道虎沟地区的张家口组沉积层中采到的化石组合和同位素年龄多数反映时代为晚侏罗纪;义县组生物化石组合和同位素年龄反映时代为早白垩纪。故将侏罗纪与白垩纪界线置于张家口组与义县组之间,同国际年表年代界限（145.5 Ma）相一致。
本文介紹瞭遼西中生代土城組、張傢口組、義縣組地層特徵、化石組閤。通過巖石地層、生物地層、同位素年代學研究,併在寧城道虎溝地區的張傢口組沉積層中採到的化石組閤和同位素年齡多數反映時代為晚侏囉紀;義縣組生物化石組閤和同位素年齡反映時代為早白堊紀。故將侏囉紀與白堊紀界線置于張傢口組與義縣組之間,同國際年錶年代界限（145.5 Ma）相一緻。
본문개소료료서중생대토성조、장가구조、의현조지층특정、화석조합。통과암석지층、생물지층、동위소년대학연구,병재저성도호구지구적장가구조침적층중채도적화석조합화동위소년령다수반영시대위만주라기;의현조생물화석조합화동위소년령반영시대위조백성기。고장주라기여백성기계선치우장가구조여의현조지간,동국제년표년대계한（145.5 Ma）상일치。
This paper introduces the stratum features and fossil combination of Mesozoic Tuchengzi Formation,Zhangjiakou Formation,Yixian Formation.Through the study of lithostratigraphy,biostratigraphy,isotopic geochronology,and found the fossils combination and isotopic age,where collected in Zhangjiakou Formation deposited layer in the Ningchengdao Hugou areas,mostly are late Jurassic the fossils.And the fossil combination and isotopic age of Yixian Formation were early Cretaceous Period.The boundary of Jurassic and Cretaceous was placed between Zhangjiakou Formation and the Yixian Formation,consistent with the international chronology time limit（145.5 Ma）.
