准噶尔盆地基底结构的地震转换波探测
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摘要
为研究准噶尔盆地的基底和地壳结构,在盆地内完成了4条地震转换波测深剖面,总长为1600km.结果表明,准噶尔盆地地壳具有陆壳性质,基底为双层结构,上层为海西运动期褶皱基底,下层为前寒武系结晶基底,褶皱基底厚度不超过10km,在三个泉凸起以北厚度较大,为3～10km,在此凸起以南,厚度只有0～4km.结晶基底顶面的埋深为5～16km.地壳厚度为44～52km,平均为47～48km.盆地内存在一系列基底断裂和深部超壳断裂,它们对盆地内油气分布有重要控制作用。
To study the deep structures of basement and crust in Junggar basin, 4 seismic profiles from deep-sounding by converted waves of earthquakes have been done with total length of 1 600 km. The results of investigation show that the crust in Junggar basin features continental character, and the basement of the basin is characterized by two-layer structure, the upper layer is Hercynian folded basement, and the lower is Pre-Cambrian crystalline basement. The total thickness of Hercynian forded basement is less than 10 km, to the north of Sangequan swell its thickness is about 3～10 km, to the south of it its thickness is only about 0～4 km. The depth of the top of PreCambrian crystalline basement is about 5～16 km. The total thickness of the crust in the basin changes in range of 44～52 km, averages 47～48 km. A series of deep fractures have been detected in the basement and the crust in the basin, which are significant in the control of the distribution of oil and gas resources.
To study the deep structures of basement and crust in Junggar basin, 4 seismic profiles from deep-sounding by converted waves of earthquakes have been done with total length of 1 600 km. The results of investigation show that the crust in Junggar basin features continental character, and the basement of the basin is characterized by two-layer structure, the upper layer is Hercynian folded basement, and the lower is Pre-Cambrian crystalline basement. The total thickness of Hercynian forded basement is less than 10 km, to the north of Sangequan swell its thickness is about 3～10 km, to the south of it its thickness is only about 0～4 km. The depth of the top of PreCambrian crystalline basement is about 5～16 km. The total thickness of the crust in the basin changes in range of 44～52 km, averages 47～48 km. A series of deep fractures have been detected in the basement and the crust in the basin, which are significant in the control of the distribution of oil and gas resources.
引文
1)张先康,张成科,嘉世旭等,地学大断面人工地震探测与研究报告,1999.
2)张义杰,何正怀,陈新江等,准噶尔盆地地质结构、演化及构造单元划分,新疆石油管理局勘探开发研究院,1998.
[1]邵学钟,张家茹、杨小峰,等.利用地震转换波探测地壳上地幔构造试验[J].地球物理学报,21(2),89-100:1978.
[2]张家茹,邵学钟,雷胜利,等.利用转换波的偏振特性提高转换波震相识别的可靠性[J].地球物理学报,1982,25(4):352-359.
[3]邵学钟,雷兴林,张家茹,等.天然地震转换波测深[A].汤永安.华北平原南部深部地球物理综合探测方法与成果[C].北京:海洋出版社,1989:204-244.
[4]张家茹,邵学钟,高维安.地震转换波测深中PS转换震相的分离和参数测定[J].地震学报,1993,15(1):39-45.
[5]邵学钟,张家茹,范会吉,等.天山造山带地壳结构与构造——乌鲁木齐-库尔勒地震转换波测深剖面[J].地球物理学报,1996,39(3):336-345.
[6]邵学钟,张家茹,范会吉.塔里木盆地地壳构造的地震转换波研究[A].贾承造.塔里木盆地石油地质研究新进展[C].北京:科学出版社,1996.
[7]范会吉,邵学钟,张家茹.波形反演方法及其在新疆地区震转换波测深中的应用[J].地球物理学报,1997,40(3):369-379.
[8]邵学钟,张家茹,殷秀华.油气勘探与地壳深部构造研究[J].石油勘探与开发,1999,26(2):11-14.
[9]袁学诚.阿-阿断面与西夏克拉通(第5辑)[M].北京:地质出版社,1994.
[10]胡方秋,刘景元.可可托海-阿克塞测深大剖面北段深部构造与地震[J].内陆地震,1994,8(2):.
[11]彭希龄.准噶尔盆地早古生代陆壳存在的证据[J].新疆石油地质,1994,15(4):291-297.
[12]况军.地体拼贴与准噶尔盆地的形成演化[J].新疆石油地质,1993,14(2):126-132.
2)张义杰,何正怀,陈新江等,准噶尔盆地地质结构、演化及构造单元划分,新疆石油管理局勘探开发研究院,1998.
[1]邵学钟,张家茹、杨小峰,等.利用地震转换波探测地壳上地幔构造试验[J].地球物理学报,21(2),89-100:1978.
[2]张家茹,邵学钟,雷胜利,等.利用转换波的偏振特性提高转换波震相识别的可靠性[J].地球物理学报,1982,25(4):352-359.
[3]邵学钟,雷兴林,张家茹,等.天然地震转换波测深[A].汤永安.华北平原南部深部地球物理综合探测方法与成果[C].北京:海洋出版社,1989:204-244.
[4]张家茹,邵学钟,高维安.地震转换波测深中PS转换震相的分离和参数测定[J].地震学报,1993,15(1):39-45.
[5]邵学钟,张家茹,范会吉,等.天山造山带地壳结构与构造——乌鲁木齐-库尔勒地震转换波测深剖面[J].地球物理学报,1996,39(3):336-345.
[6]邵学钟,张家茹,范会吉.塔里木盆地地壳构造的地震转换波研究[A].贾承造.塔里木盆地石油地质研究新进展[C].北京:科学出版社,1996.
[7]范会吉,邵学钟,张家茹.波形反演方法及其在新疆地区震转换波测深中的应用[J].地球物理学报,1997,40(3):369-379.
[8]邵学钟,张家茹,殷秀华.油气勘探与地壳深部构造研究[J].石油勘探与开发,1999,26(2):11-14.
[9]袁学诚.阿-阿断面与西夏克拉通(第5辑)[M].北京:地质出版社,1994.
[10]胡方秋,刘景元.可可托海-阿克塞测深大剖面北段深部构造与地震[J].内陆地震,1994,8(2):.
[11]彭希龄.准噶尔盆地早古生代陆壳存在的证据[J].新疆石油地质,1994,15(4):291-297.
[12]况军.地体拼贴与准噶尔盆地的形成演化[J].新疆石油地质,1993,14(2):126-132.
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