| 辽西建昌盆地下白垩统义县组的划分及其介形类化石 |
| |
| 引用本文： | 张立君,张立东,场雅军,郭胜哲,王五力,郑月娟,丁秋红,成龙.辽西建昌盆地下白垩统义县组的划分及其介形类化石[J].地质与资源,2012,21(1):81-92. |
| |
| 作者姓名： | 张立君 张立东 场雅军 郭胜哲 王五力 郑月娟 丁秋红 成龙 |
| |
| 作者单位： | 1. 沈阳地质矿产研究所, 辽宁 沈阳 110034;2. 沈阳师范大学古生物研究所, 辽宁 沈阳 110034 |
| |
| 基金项目： | 中国地质调查局工作项目 |
| |
| 摘 要： | 以要路沟上平房-青石岩、上白庙-罗家沟和小郎家沟-三门店剖面为代表的建昌盆地义县组，自下而上分为5段：第一段主要为砂砾岩（要路沟层）；第二段为砂泥岩、页岩夹凝灰岩，其中包括上白庙层含Cypridea（C.）biventricostata-Yumenia luojiagouensis介形类亚组合带，罗家沟层产介形类Cypridea（C.）luanpingensis-Yumenia unidorsalta-Djungarica camarata亚组合带以及爬行类和鸟类等多门类化石，后狮沟里层以鱼类和介甲类化石为主；第三段岩性是中酸熔岩及其火山碎屑岩；第四段亦称前狮子沟层，以砂页岩为主，夹安山岩，含介形类Yumenia luojiagouensis-Jianchangella dorsicostata亚组合带；第五段为酸性火山岩.上述各层介形类亚组合统归该盆地义县组Cypridea（C.）biventricostata-Yumenia luojiagouensis-Djungarica camarata组合带，其时代属早白垩世早期.文中描述了介形类化石1新属7新种.
|
| 关 键 词： | 义县组 介形类化石 早白垩世 建昌盆地 辽西 |
| 收稿时间： | 2011-12-14 |
DIVSION OF THE LOWER CRETACEOUS YIXIAN FORMATION AND ITS OSTRACOD FOSSILS IN JIANCHANG BASIN, WESTERN LIAONING |
| |
| ZHANG Li-jun
,
ZHANG Li-dong
,
YANG Ya-jun
,
GUO Sheng-zhe
,
WANG Wu-li
,
ZHENG Yue-juan
,
DING Qiu-hong
,
CHENG Long.DIVSION OF THE LOWER CRETACEOUS YIXIAN FORMATION AND ITS OSTRACOD FOSSILS IN JIANCHANG BASIN, WESTERN LIAONING[J].Geology and Resources,2012,21(1):81-92. |
| |
| Authors: | ZHANG Li-jun ZHANG Li-dong YANG Ya-jun GUO Sheng-zhe WANG Wu-li ZHENG Yue-juan DING Qiu-hong CHENG Long |
| |
| Institution: | 1. Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, China;2. Institute of Paleontology, Shenyang Normal University, Shenyang 110034, China |
| |
| Abstract: | The Yixian Formation of Jianchang Basin,represented by the Shangpingfang-Qingshiyan,Shangbaimiao-Luojiagou and Xiaolangjiagou-Sanmendian stratigraphic sections in Yaolugou area,may be subdivided into five members.The first member is characterized mainly by sandy conglomerate(Yaolugou layer).The second member is composed of sandy mudstone and shale intercalated with tuff,including the ostracod Cypridea(C.) biventricostata-Yumenia luojiagouensis assemblage subzone(in Shangbaimiao layer),Cypridea(C.) luanpingensis-Yumenia unidorsalta-Djungarica camarata assemblage subzone(in Luojiagou layer),and the fossil birds and reptiles etc.,but the Houshigouli layer contains mainly fossil fishes and conchostracas.The third member consists of acidic-intermediate lavas and its pyroclastic rocks.The fourth member,called Qianshizigou layer,is characteristic of sandshale intercalated by andesite,containing the ostracod Yumenia luojiagouensis-Jianchangella dorsicostata assemblage subzone.The fifth member is of acid volcanic rocks.All the above mentioned ostracod assemblage subzones are put under the Cypridea(C.) biventricostata-Yumenia luojiagouensis-Djungarica camarata assemblage zone of Yixian Formation in Jianchang Basin,to be the early stage of Early Cretaceous in age.This paper describes the fossil ostracods of one new genus and seven new species. |
| |
| Keywords: | Yixian Formation ostracod fossil Early Cretaceous Jianchang Basin Western Liaoning Province |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地质与资源》浏览原始摘要信息 |
| 点击此处可从《地质与资源》下载免费的PDF全文 |
|
