二连盆地白音查干凹陷下白垩统震积岩的发现及其地质意义

二连盆地白音查干凹陷下白垩统震积岩的发现及其地质意义

岳信东，林春明，李艳丽，徐深谋，张志萍，漆滨汶，王秀林，张放东

1. 内生金属矿床成矿机制研究国家重点实验室（南京大学），南京大学地球科学与工程学院，南京 210093；2. 中国石油化工股份有限公司西北油田分公司勘探开发研究院，乌鲁木齐 830011；3. 中国海洋石油有限公司上海分公司勘探部，上海 200030；4. 中国石油化工股份有限公司中原油田分公司勘探开发科学研究院，濮阳，457001）

收稿日期:2009-03-20 修回日期:2009-03-20 出版日期:2009-03-20 发布日期:2009-03-20

The Discovery of Seismites in the Lower Cretaceous of Baiyinchagan Depression, Erlian basin and Its Geological Implications

YUE Xin-dong, LIN Chun-ming, LI Yan-li, XU Shen-mou, ZHANG Zhi-ping, QI Bin-wen,WANG Xiu-lin, ZHANG Fang-dong

1. State Key Laboratory for Mineral Deposits Research, Inst. of Earth Sciences and Engineering, Nanjing University,Nanjing 210093, China; 2. E & P Research Institute of Northwest Branch, SINOPEC, Urumchi 830011, China;3. Exploration Department of Shanghai Branch of CNOOC, Shanghai 200030, China; 4. Scientific Research Institute of Exploration and Development of Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China

Received:2009-03-20 Revised:2009-03-20 Online:2009-03-20 Published:2009-03-20

摘要/Abstract

摘要： 二连盆地白音查干凹陷下白垩统钻井取芯中发现有变形和开裂两类特殊地质现象。同沉积塑性变形和碟状构造属于变形，微断层、网状裂缝、砂岩岩脉、角砾岩为开裂。这些地质现象具有震积岩的特征，多由外界振动引发。变形多发生在沉积物未固结—半固结阶段，开裂发生在沉积物成岩后。微断层、网状裂缝和砂岩岩脉形成于拉张应力作用下。这些特殊地质现象多出现在腾格尔组和都红木组一段，而且从下往上，由开裂向变形演化。这与当时区域伸展构造背景和地震、构造活动有关，地震、构造活动较为强烈时容易产生开裂现象，地震、构造活动较为微弱时容易产生变形。

Abstract: In the lower Cretaceous drilling cores of Baiyinchagan Depression, Erlian Basin, two types of special geological phenomena are discovered, of which the syn-depositional plastic deformations and saucer-shaped structures belong to deformation,and the micro-faults, net-shaped fractures, sand dykes and syn-depositional breccia belong to cracking. The special geological phenomena were initiated by the outside viberation and are characterized by seismites. The deformation phenomena were mostly formed during the non-solidification-semisolidification phase, and the cracking often came into being after the diagenesis. The micro-faults, net-shaped fractures and sand dykes were attributed to the extensional stresses. The special geological phenomena were abundantly distributed in the Tenggeer Formation and Du 1 Member of Duhongmu Formation, and they gradually evolved from cracking into deformation upwards along the vertical direction. The research also showed that they were related to the tectonic background of regional extension and the activities of palaeo-faults and palaeo-earthquakes, of which the intensely active faults and strong earthquakes often caused cracking and the gently active faults and weak earthquakes mostly caused deformation.

岳信东，林春明，李艳丽，徐深谋，张志萍，漆滨汶，王秀林，张放东. 二连盆地白音查干凹陷下白垩统震积岩的发现及其地质意义[J]. J4.

YUE Xin-dong, LIN Chun-ming, LI Yan-li, XU Shen-mou, ZHANG Zhi-ping, QI Bin-wen,WANG Xiu-lin, ZHANG Fang-dong. The Discovery of Seismites in the Lower Cretaceous of Baiyinchagan Depression, Erlian basin and Its Geological Implications[J]. J4.