北京师范大学学报(自然科学版)
北京師範大學學報(自然科學版)
북경사범대학학보(자연과학판)
JOURNAL OF BEIJING NORMAL UNIVERSITY
2014年
3期
302-306
,共5页
左博%王多云%张瑜%辛补社
左博%王多雲%張瑜%辛補社
좌박%왕다운%장유%신보사
留山盆地%鸭河口剖面%层序地层%凝灰岩%湖泛面
留山盆地%鴨河口剖麵%層序地層%凝灰巖%湖汎麵
류산분지%압하구부면%층서지층%응회암%호범면
Liushan basin%Yahekou section%sequence stratigraphy%tuff%lake flood surface
对位于秦岭造山带内的河南南阳留山盆地鸭河口剖面三叠系进行了详细测量和层序地层学研究.对首次发现的凝灰岩进行了精细刻画,依据其 SHRIMP锆石 U-Pb定年得到(237±2.5)Ma 的地质年龄值,认为以前被划归上三叠统的太山庙组应属于中三叠统,在地层年代学上可以与华北地块南缘的铜川组(陕西)或者油坊庄组(河南)对比.以此作为标志层以及识别出的3个湖泛面和4个层序界面,将太山庙组和太子山组下部地层划分为3个层序旋回.
對位于秦嶺造山帶內的河南南暘留山盆地鴨河口剖麵三疊繫進行瞭詳細測量和層序地層學研究.對首次髮現的凝灰巖進行瞭精細刻畫,依據其 SHRIMP鋯石 U-Pb定年得到(237±2.5)Ma 的地質年齡值,認為以前被劃歸上三疊統的太山廟組應屬于中三疊統,在地層年代學上可以與華北地塊南緣的銅川組(陝西)或者油坊莊組(河南)對比.以此作為標誌層以及識彆齣的3箇湖汎麵和4箇層序界麵,將太山廟組和太子山組下部地層劃分為3箇層序鏇迴.
대위우진령조산대내적하남남양류산분지압하구부면삼첩계진행료상세측량화층서지층학연구.대수차발현적응회암진행료정세각화,의거기 SHRIMP고석 U-Pb정년득도(237±2.5)Ma 적지질년령치,인위이전피화귀상삼첩통적태산묘조응속우중삼첩통,재지층년대학상가이여화북지괴남연적동천조(협서)혹자유방장조(하남)대비.이차작위표지층이급식별출적3개호범면화4개층서계면,장태산묘조화태자산조하부지층화분위3개층서선회.
Sequence stratigraphy of the Yahekou section in Liushan basin in Nanzhao county,Henan province was investigated in the present paper.According to SHRIMP zircon age (237±2.5)Ma,Taishanmiao formation was deposited as early as the Middle Triassic.Simultaneously,Taishanmiao formation can be compared with Tongchuan formation and Youfangzhuang formation.By analyzing Yahekou section and tuff characteristics and its regularities of distribution,3 regional lake flood surface and 4 lithofacies transition surface were identified in Middle-Upper Triassic of inter basin.This was further divided into 3 third sequences.