吐哈盆地台北凹陷中侏罗统三间房组孢粉组合

新疆石油地质 ›› 1998, Vol. 19 ›› Issue (4): 290-298.

吐哈盆地台北凹陷中侏罗统三间房组孢粉组合

吉利明, 王发泰, 张晓宝, 王武和

中国科学院兰州地质研究所兰州 730000

收稿日期:1997-09-24 出版日期:1998-08-01 发布日期:2020-09-19
作者简介:吉利明:副研究员地层古生物

SPOROPOLLEN ASSEMBLAGE OF SANJIANFANG FORMATION IN MIDDLE JURASSIC IN TAIBEI SAG, TURPAN-HAMI BASIN

Ji Liming, Wang Fatai, Zhang Xiaobao, Wang Wuhe

Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000

Received:1997-09-24 Online:1998-08-01 Published:2020-09-19
About author:Ji Liming, Associate Professor, Palaeontology

摘要/Abstract

摘要： 台北凹陷是吐哈盆地的主要含油气区, 而三间房组的大套砂岩是本地区的主要储集层。对采自葡1井和草南1 井三间房组样品的分析, 发现孢粉化石33 属69 种, 依据属种含量分布及地史意义, 孢粉植物群可确立为Cyathidites-Classopollis-Piceites 组合。组合中裸子植物花粉占优势, 含量为60.4 %, 蕨类植物孢子含量为39.6 %.通过主要类型和重要属种地史分布的讨论、对比, 结合地层的上下关系, 认为三间房组孢粉组合与辽宁西部蓝旗组等地层所产的组合较相似, 地质时代为中侏罗世中期,大致相当Bajocian-Bathonian 期。

关键词: 吐鲁番盆地, 哈密盆地, 中侏罗世, 孢粉组合, 裸子植物, 蕨类植物

Abstract: Tabei sag is the main hydrocarbon-bearing area in Turpan-Hami basin, while the thick stratified sandstone of Sanjianfang formation is the main reservoi r in this area.Based on the analysis of samples from Wells Pu 1 and Caonan 1, sporopollens fossils discovered in Sanjianfang formation consist of 33 genera 69 species, the sporopollen assemblage can be established as Cyathidi tes-Classopollis-Picei tes according to the percentage of genera and species and their geologic significances.It is dominated by gymnospermous pollen, accounting for 60 %, next is the pteridophyta spore, accounting for 39.6%.By analysing the geologic history of main classes and important genera and species, along with the contact relationships of the Sanjianfang formation wi th overlying and underlying strata, i t is considered that the sporopollen assemblage from Sanjianfang formation is similar to the one from Lanqi formation in western Liaoning province.Its geologic age is the middle stage of Middle Jurassic, corresponding to Bajocian-Bathonian stage in general.

Key words: Turpan basin, Hami basin, Middle Jurassic, Sporopollen assemblage, Gymnospermae, Pteridophyte

吉利明, 王发泰, 张晓宝, 王武和. 吐哈盆地台北凹陷中侏罗统三间房组孢粉组合[J]. 新疆石油地质, 1998, 19(4): 290-298.

Ji Liming, Wang Fatai, Zhang Xiaobao, Wang Wuhe. SPOROPOLLEN ASSEMBLAGE OF SANJIANFANG FORMATION IN MIDDLE JURASSIC IN TAIBEI SAG, TURPAN-HAMI BASIN[J]. Xinjiang Petroleum Geology, 1998, 19(4): 290-298.

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