利用卫星重力数据研究印尼Bone盆地构造区划  

Tectonic districts by satellite gravity data of the Bone basin,Sulawesi,Indonesia

作　　者：杨敏 王万银[1] 杜向东 方勇 张科 

机构地区：[1]长安大学重磁方法技术研究所,长安大学地质工程与测绘学院,西安710054 [2]中海油研究总院,北京100027

出　　处：《地球物理学进展》2016年第3期999-1009,共11页Progress in Geophysics

基　　金：国家科技重大专项大陆边缘盆地地球物理勘探关键技术攻关与应用研究课题(2011ZX05030-004);中央高校基本科研业务费专项资金(2014G3262010;310826163301);长安大学基础研究支持计划专项基金联合资助

摘　　要：印尼Bone盆地,位于印度尼西亚东部地区,油气潜力不容忽视.而油气资源储量与该区的构造演化有关,并受构造体系、岩浆活动等地质因素控制.因此,利用卫星重力资料研究印尼Bone盆地的构造区划,为进一步划分油气远景区提供地球物理依据.研究中利用布格重力异常归一化总水平导数垂向导数(NVDR_THDR)推断出Bone盆地控盆断裂4条,控坳断裂5条;利用最小曲率位场分离技术划分Bone盆地边界以及二级构造单元3个和三级构造单元10个;利用双界面模型重力场快速正反演算法,计算得到Bone盆地沉积层厚度分布图.研究表明,Bone盆地为NNW走向,呈现"东西分带、南北分块"的格局;NNW向断裂分布控制了盆地展布和内部构造单元分布,控制盆地东、西边界,并使得盆地呈现"东西分带"格局;NE向断裂分布控制盆地南、北边界,并使得盆地分布呈现"南北分块"的格局.通过进一步研究认为,东森康盆地为Bone盆地的一个坳陷(凹陷).The Bone Basin is located in the eastern Indonesia. The potential of oil and gas cannot be ignored. The reserves of oil and gas are connected with the evolution of the Bone Basin,and the geological factors,such as the tectonic system,magmatic activity.In order to provide geophysical basis for further area of oil and gas,the fault of structure and tectonic zoning of the Bone basin in Indonesia are studied by using satellite gravity data. In this study,nine faults are deduced with edge recognition technology based on the normalized vertical derivative of the total horizontal derivative（ NVDR THDR） for potential data,which contains four basincontrolling faults and five depression-controlling faults. By using the minimum curvature technique for potential field data separation,the boundary of the Bone basin and three secondary-tectonic units and ten third- structural units are divided, combined with the distribution of the faults. According to Fast solution of forward and inversion problems for gravity field in a dual interface model,the thickness distribution of sedimentary layer in Bone basin is obtained. In this paper,the Bone basin is the trend of NNW,and presents the pattern of ‘Belt east-west,north-south block ＇. the distribution of the NNW-fault control the the distribution of the Bone Basin,which presents‘Belt east-west＇,the distribution of the NEfault control the the boundary of the tectonic units,which presents‘north-south block＇. Through research,the relationship between the Bone Basin and Eastern Sengkang Basin is further cleared,we think the Eastern Sengkang Basin is one of depressions in the Bone Basin.

关 键 词：Bone盆地 卫星重力数据 断裂分布 沉积凹陷 构造区划 

分 类 号：P312[天文地球—固体地球物理学]