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| 中国大陆科学钻探主孔2000米以上脆性变形构造应力场 | |
| 引用本文： | 崔军文,王连捷,李朋武,徐东辉,吴海燕.中国大陆科学钻探主孔2000米以上脆性变形构造应力场[J].岩石学报,2004,20(1):73-80. |
| 作者姓名： | 崔军文 王连捷 李朋武 徐东辉 吴海燕 |
| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037 2. 中国地质科学院地质力学研究所,北京,100081 3. 胜利石油管理局测井公司,山东,东营,257001 |
| 基金项目： | 中国大陆科学钻探工程的部分基础研究成果,得到了科技部重大基础研究前期研究专项(2001CCB00900)，国土资源部科技专项(2002207)，国土资源部重点科技项目(20010101)，中国地质调查局地调项目(150C002004)，中国地质科学院地质研究所大陆动力学实验室资助 |
| 摘 要： | 在主孔2000米之内，存在复杂的脆性破裂系统和构造应力场。根据其充填物的特征，可划分为由石英、方解石和绿泥石等矿物充填的微破裂，发育石英、方解石等矿物薄膜或擦痕线理的微破裂和既无矿物充填、也无矿物薄膜的微破裂等3种不同类型的脆性应变现象，它们依次代表早、中、晚和深、中、浅3个不同构造层次的脆性变形。初步分析表明脆性变形阶段存在有以南东东-北西西向为主导的挤压作用、北东-南西向的区域挤压作用、南北向挤压作用和垂向伸展作用等4期构造应力场。郯庐断裂东侧的现代构造应力场在区域上具有极大的稳定性。在脆性和脆-韧性转换带，制约苏鲁高压-超高压变质带侵位的主导应力作用方式为自南东东往北西西方向的挤压，它在时间和空间上具有一定的稳定性。 |
| 关 键 词： | 脆性变形 微破裂 钻孔崩落 构造应力场 挤压作用 垂向伸展作用 |
| 文章编号： | 1000-0569/2004/020(01)-0073-80 |
| 修稿时间： | 2003年11月30 |
Tectonic stress field of brittle deformation within 2000m of the main borehole Chinese Continental Scientific Drilling |
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| GUI JunWen,WANG Lianjie,LI PengWu,XU DongHui and WU HaiYan Institute of Geology,Chinese Academy of Geological Sciences,Beijing,China Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing,China Well Logging Company,Shengli Oil Administration,Dongying,China.Tectonic stress field of brittle deformation within 2000m of the main borehole Chinese Continental Scientific Drilling[J].Acta Petrologica Sinica,2004,20(1):73-80. | |
| Authors: | GUI JunWen WANG Lianjie LI PengWu XU DongHui and WU HaiYan Institute of Geology Chinese Academy of Geological Sciences Beijing China Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China Well Logging Company Shengli Oil Administration Dongying China |
| Abstract: | There exist a complex brittle fracture system and a tectonic stress field within 2000 m of the main hole. According to the features of its fillings, three different types of brittle strain phenomena may distinguished; they are microfractures filled by quartz, calcite, chlorite and other minerals, microfractures with films of minerals such as quartz and calcite or with striation lineation, and microfractures with neither mineral filling nor mineral films. They represent the early, middle and late phases and deep, middle and shallow tectonic levels of brittle deformation, respectively. Preliminary analysis indicates that four phases of tectonic stress fields, i. e. dominantly ESE and WNW compression, NE-SW regional compression, N-S compression and vertical extension, occur in the stage of brittle deformation. The modern tectonic stress field on the eastern side of the Tanlu fault is regionally very stable. In the brittle and brittle-ductile transition belts, the dominant mode of stress action constraining the emplacement of the Sulu high-pressure and ultrahigh-pressure metamorphic belt is ESE-WNW compression, which shows certain stability in time and space. |
| Keywords: | Brittle deformation Microfracture Borehole breakout Tectonic stress field Compression Vertical extension |
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