准噶尔盆地重磁力场与构造特征分析
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摘要
采用归一化总水平导数法对准噶尔盆地重磁力场数据进行了分析。结果表明,归一化总水平导数法能较好地反映磁力场异常区与地质构造的关系。在准噶尔盆地的东北部区域,青格里底山断裂带和克拉美丽断裂带均呈现显著的垂直重力磁力场异常区,在盆地的中部区域存在局部垂直负重磁力场异常区。准噶尔盆地为断陷盆地,断裂带主要分布在盆地的边缘,重磁力场普遍较强。在盆地的中部重磁力场普遍较弱,且存在部分负磁力场异常区。准噶尔盆地中南部地区整体表现为"东西宽,南北窄"的狭长重力负异常区,且在中央坳陷区内存在显著的垂直重力负磁力场异常区,这可能是由火山岩活动造成的。
The normalized total level derivative method is adopted to analyze the gravity magnetic field data.The results show that the normalized total level derivative method can provide a reliable basis about the relationship between the gravity field and fault distribution.It forms a significant vertical gravity magnetic anomaly zone in the northeast area of Junggar basin,the green mountain fault zone and the"Kelameili"fault zone.It exists significant negative local vertical gravity field anomaly area in the central area of the Junggar basin.Besides,it can also be found that the Junggar basin is a fault basin,the fault zones are mainly distributed in the edge of the Junggar basin,in which also exists strong gravity field.On the contrast,there is no obviously gravity field exists in the central basin,where exists negative gravity field in certain part of this area.The overall shape of the anomalous negative gravity field of the south central of Junggar basin presents a"wide length from the east to the west and narrow length from the north to the south",and there is a significant anomalous negative vertical gravity in the central depression area of the Junggar basin,which may be caused by the volcanic activities among these area.
The normalized total level derivative method is adopted to analyze the gravity magnetic field data.The results show that the normalized total level derivative method can provide a reliable basis about the relationship between the gravity field and fault distribution.It forms a significant vertical gravity magnetic anomaly zone in the northeast area of Junggar basin,the green mountain fault zone and the"Kelameili"fault zone.It exists significant negative local vertical gravity field anomaly area in the central area of the Junggar basin.Besides,it can also be found that the Junggar basin is a fault basin,the fault zones are mainly distributed in the edge of the Junggar basin,in which also exists strong gravity field.On the contrast,there is no obviously gravity field exists in the central basin,where exists negative gravity field in certain part of this area.The overall shape of the anomalous negative gravity field of the south central of Junggar basin presents a"wide length from the east to the west and narrow length from the north to the south",and there is a significant anomalous negative vertical gravity in the central depression area of the Junggar basin,which may be caused by the volcanic activities among these area.
引文
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[2]严叔澜,陈绵琨,朱振道,等.准噶尔盆地南缘阿什里地区地质构造基本特征[J].沉积与特提斯地质,2008,28(3):25-29.
[3]吴晓智.准噶尔盆地的地质结构、演化及构造单元划分[C]∥西部大开发科教先行与可持续发展——中国科协2000年学术年会文集.中国科学技术协会,2000.
[4]孔垂显,邱子刚,秦军,等.准噶尔盆地西北缘石炭系火山岩储层特征研究[J].特种油气藏,2017(6):1-6.
[5]张坦,张昌民,瞿建华,等.准噶尔盆地玛湖凹陷百口泉组相对湖平面升降规律研究[J].沉积学报,2017(5):1-14.
[6]黄远光,张昌民,丁雲,等.准噶尔盆地玛湖凹陷百口泉组典型微相砾石定向性定量研究[J].沉积学报,2017(4):1-15.
[7]寻博靖.万安盆地重磁场特征研究与构造分析[D].西安:西安石油大学,2017.
[8]成林.扬马延海脊南部重磁场特征与油气远景[D].西安:西安石油大学,2017.
[9]李光祥.十屋断陷重磁场与构造特征研究[D].西安:西安石油大学,2016.
[10]安少乐.六盘山盆地及邻区重磁场与构造特征[D].西安:西安石油大学,2016.
[11]郭晓娟.南黄海盆地重磁场及构造特征研究[D].西安:西安石油大学,2015.
[12]袁铎.哥伦比亚亚诺斯盆地重磁场特征及区域地质构造[D].西安:西安石油大学,2015.
[13]申晨.利用重磁资料研究吐哈盆地构造特征[D].西安:西安石油大学,2012.
[14]张耀荣.准噶尔盆地重磁力场特征与基底结构[J].新疆石油地质,1982(5):1-5,102-103.
[15]赵晴.普图马约盆地重磁场与石油地质特征研究[D].西安:西安石油大学,2013.
[16]郝慰三.区域重磁力场与油气的关系[J].中国海上油气:地质,1997(5):375-378.