巨野煤田重力场与构造特征
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摘要
以巨野煤田重力资料为主,结合钻井、地质、地震测量和前人研究成果,对研究区的重力场进行了研究,推断了研究区的断裂构造,拟合求解了以石炭-二叠系为沉积中心,奥陶系为基底、石炭-二叠系为中间层、中-新生界为盖层等3个密度层。研究区的主要断裂方向为近SN向断裂,它们为区域性大断裂,不仅控制了研究区煤层的分布特征,也控制了岩浆带的展布。研究区发育有巨野和汶上-宁阳两个潜凹,属于中生代断陷沉积盆地。潜凹内从东往西,沉降幅度逐渐增大,沉积物厚度由薄变厚。并形成了以奥陶系马家沟组为基底,以石炭-二叠系太原组和山西组为主要含煤系岩层,以中-新生界为盖层的沉积构造特征。
Based on gravity data of Juye coal field, combined with drilling, geology, seismic surveying and predecessors' studying results, the gravity field of the research region was studied; the fracture structure of the research area was concluded. Three density layers were fitted to solve by using Permian-Carboniferous as sedimentary center, Ordovician as basement, Permian-Carboniferous as interlayer, Mesozoic-Cenozoic as cap rock. The results show that the main fracture direction in the study area is nearly NS-trending fault; they are the regional great faults, which not only control the distribution characteristics of the coal seams in the study area, but also control the distribution of magmatic belt. Development in the study area has Juye and Wenshang- Ningyang two latent concaves, belonging to Mesozoic fault depression basin. Sedimention range gradually increases from east to west in hidden inside concave, sediment thickness is from thin to thick.And sedimentary structure characteristics with Majiagou group of Ordovician as the basement, Taiyuan and Shanxi group of Permian-Carboniferous as the main containing coal measures strata, Mesozoic-Cenozoic as the cover have been formed.
Based on gravity data of Juye coal field, combined with drilling, geology, seismic surveying and predecessors' studying results, the gravity field of the research region was studied; the fracture structure of the research area was concluded. Three density layers were fitted to solve by using Permian-Carboniferous as sedimentary center, Ordovician as basement, Permian-Carboniferous as interlayer, Mesozoic-Cenozoic as cap rock. The results show that the main fracture direction in the study area is nearly NS-trending fault; they are the regional great faults, which not only control the distribution characteristics of the coal seams in the study area, but also control the distribution of magmatic belt. Development in the study area has Juye and Wenshang- Ningyang two latent concaves, belonging to Mesozoic fault depression basin. Sedimention range gradually increases from east to west in hidden inside concave, sediment thickness is from thin to thick.And sedimentary structure characteristics with Majiagou group of Ordovician as the basement, Taiyuan and Shanxi group of Permian-Carboniferous as the main containing coal measures strata, Mesozoic-Cenozoic as the cover have been formed.
引文
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[4]袁炳强,张化安,许延浪,严云奎.集宁盆地商都凹陷重磁力场与构造特征[A].赵靖州.西安石油大学油气资源学院创建10周年学术研讨会论文集[C].北京:石油工业出版社,2007-12.
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[7]王明山.巨野煤田3煤层岩浆岩侵入规律研究[J].中国煤田地质,2005,17(4):9-11.
[2]韩美莲,魏久传.巨野煤田含煤地层层序单元划分[J].山东科技大学学报(自然科学版),2000,19(1):33-37.
[3]卫学忠,汤振清,朱鲁.巨野煤田岩浆岩侵入煤层变质规律研究[J].山东科技大学学报(自然科学版),2001,20(3):29-33.
[4]袁炳强,张化安,许延浪,严云奎.集宁盆地商都凹陷重磁力场与构造特征[A].赵靖州.西安石油大学油气资源学院创建10周年学术研讨会论文集[C].北京:石油工业出版社,2007-12.
[5]曾华霖.重力场与重力勘探.北京:地质出版社,2005,236-238.
[6]韩美莲.魏久传.巨野煤田三角洲沉积体系及其聚煤特点[J].沉积学报,2001,19(3):381-385.
[7]王明山.巨野煤田3煤层岩浆岩侵入规律研究[J].中国煤田地质,2005,17(4):9-11.
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