| 吉林辽源地区“呼兰群”的时代及划分对比 |
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| 引用本文： | 池永一,苏养正,南润善.吉林辽源地区“呼兰群”的时代及划分对比[J].地球学报,1996,17(Z1):140-147. |
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| 作者姓名： | 池永一 苏养正 南润善 |
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| 作者单位： | 沈阳地质矿产研究所;沈阳地质矿产研究所;沈阳地质矿产研究所 |
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| 摘 要： | 辽源地区“呼兰群”模式剖面很可能为倒转向斜构造,因此由下而上层序为石灰窑组石缝组、弯月组.在石缝组产Thamnopora sp., Cladopora sp., Spongophyllum sp. 和Pro-tathyris sp. 及弯月组中产Thamnopora sp., Cladopora sp., Syringopora sp., 和Cirophyl-lum sp.,这些属的组合时代为志留纪,最可能为晚志留世.根据石缝组和弯月组的岩性特征和化石组合性质,大致可与呼兰君北岔屯组,内幕古东部的晒忽苏组和八当山火相对比,但不能与景家台的早志留世桃山组、晚奥陶世放牛沟火山岩和景家台大理岩相对比.这对华北地台北缘地质构造演化研究有重要意义.
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| 关 键 词： | 吉林辽源 呼兰群 时代 |
Age Division and Correlation of "Hulan Group" at Liaoyuan District in Jilin |
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| Chi Yongyi,Su Yangzheng and Nan Renshan.Age Division and Correlation of "Hulan Group" at Liaoyuan District in Jilin[J].Acta Geoscientia Sinica,1996,17(Z1):140-147. |
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| Authors: | Chi Yongyi Su Yangzheng and Nan Renshan |
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| Institution: | Shenyang Institute of Geology and Mineral Resources, CAGS;Shenyang Institute of Geology and Mineral Resources, CAGS;Shenyang Institute of Geology and Mineral Resources, CAGS |
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| Abstract: | The "Hulan group" at Liaoyuan district in Jilin province was divided into Shifeng, Wanyue and Shihuiyao formations in ascending order by some authors. Guo et al (1962)consid-ered this group to be Devonian in age. Surveying Team of Regional Geology of Jilin province (1978) correlated the Shihuiyao and Wanyue formations to Lower Silurian graptolite-bearing Taoshan formation and the underlying Shifeng formation to Late Ordovician bed. Zhou (1980) pointed out that the stratotype section of the "Hulan group" in Wanyue is a reverseanticline and the group was divided into Wayue, Shifeng and Shihuiyao fomations in ascending order with an age of Middle-late Silurian.
However, the syncline structures are developed in the "Hulan group" area, and the Shifeng formation may be correlated to Saiwusu formation and the Wayue formation to Badangshan volcanics of southeastern Nei Mongol acoording to lithological and fossil associations. It is possi-ble that, the stratotype of the "Hulan group" is a reverse syncline and the sequece of the "Hulan group" should be shihuiyao, Shifeng and Wanyue formations is ascending order. The Shifeng formation yields fossils Thamnopora sp., Cladopora sp., Spongophyllum sp., and Pro-tathyris sp. and the Wanye formation contains Thamnopora sp., Cladopora sp., Syringopo-ra sp., Circophyllum sp., and Streptolasma? sp., indicating an age of Late Silurian (Lud-low). |
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| Keywords: | Liaoyuan district in jilin age of "Hulan group" |
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