根据遗迹化石确定台北凹陷中侏罗世湖岸带  

Determination of three Middle Jurassic lake coastal zones by trace fossils in Taibei sag, Turpan basin, Northwest China

作　　者：张建平[1] 吴因业[2] 杨式溥[1] 薛叔浩[2] 

机构地区：[1]中国地质大学(北京) [2]中国石油天然气集团公司石油勘探开发科学研究院

出　　处：《石油勘探与开发》2000年第3期33-35,共3页Petroleum Exploration and Development

基　　金：中国石油天然气总公司"八五"重点科技攻关项目!"中国油气储层研究"

摘　　要：遗迹化石组合特征对确定湖盆岸带具有重要价值。吐哈盆地台北凹陷中侏罗统发现丰富的动、植物遗迹化石群落，通过对遗迹化石的分析研究，确定了台北凹陷中侏罗世湖岸带的变化为：西山窑组沉积中、晚期，南带（靠近觉罗塔格山一侧）的湖岸带西起胜金台、东到连木沁以北，北带（靠近博格达山一侧）的湖岸带基本在柯7井和柯6井偏北；三间房组沉积期，南带的湖岸带西起股金口胜101井，连木沁剖面正处于东侧岸带，北带湖岸带与西山窑组沉积期基本相同；七克台组沉积期湖水面积最大，南带湖岸带西起胜101井以南、东达连木沁以南，北带湖岸带继续北移。总体来看，从早到晚，湖水面积不断扩大，湖岸带后移，丘陵油田大多数井处于相对较深的浅湖区。图1参3（邹冬平摘）This paper provides evidence to prove that the trace fossil assemblages are of great value in determining lake coastal zones.The abundant the and plant trace fossils have been discovered in the Middle Jurassic strata of Taibei sag, Turpan basin. Through a detailed study on these trace fossils, three different lake coastal zones are determined in the study area. The daseriptions of three zones are as follows: during middler-late Xishanyao deopsition period, the southem lake coastal zone (near to Qoltag mountain)extended along the line from Shengjintai on west to the north of Lianmuqin on east; and the northem one (near to Bogda mountain)laid at the north of Wells K7 and K6. To the Sanjianfang deposition period, the south zone moved to the north, extending from Well SH101 of Shengiintai on west to the Lianmuqin section on east, which was roughly at same position to that in Xishanyao deposition period. In the Qiktim deposition Period, the lake area reached its maximum, the southem lake coastal zone extended from the south of Well SH101 on west to the south of Lianmuqin on east, and the northem zone was shifted northward. In general, from early to late period, the lake area in the Turpan basin was expanding, and lake coastal zones was shifting backward, most of wells in Qiuling oil field were located in shallow lake with a relatively deep water.

关 键 词：遗迹化石 侏罗世 湖岸带 台北凹陷 环境特征 

分 类 号：P534.52[天文地球—古生物学与地层学]