1:25万大同幅区域地质调查项目成果
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摘要
通过对1:25万大同市幅地质概况的介绍,重点论述了所取得的主要成果:(1)对区内构造单元进行了划分,查明了各个构造单元的物质组成及变质、变形特点,建立了早前寒武纪地质构造事件演化序列及其地质构造演化模式,恢复了本区的地质构造发展史;(2)对前人所称集宁群进行了重新认识和解体,认为原集宁群由变质深成岩与变质表壳岩系组成,同时针对区内的沉积盖层,系统地建立了岩石地层格架,为生物地层、年代地层划分提供了新资料;(3)将区内变质深成岩划分为4个岩浆岩带,对各个岩浆岩带的变质深成岩进行了详细解体与划分;(4)针对区内的中生代侵入岩,查明了其空间分布、岩石特征、岩石化学及地球化学特征,探讨了岩石成因,研究了其构造背景;(5)针对区内早前寒武纪变质岩系变质矿物,查明了不同变质体的变质矿物组合特点和矿物世代关系;(6)针对区内的构造形迹,建立了本区构造格架,将早前寒武纪的构造变形划分为五台期早晚2次变形,吕梁期早晚2次变形,并针对区内中生代构造,查明了各个盆地的盆缘构造特征和不同方向、不同期次、不同性质断裂的分期配套关系,尤其是查明了大同盆地西缘大型构造带的空间展布、性质、断裂组合及运动学特征,对探讨山西中—新生代盆地的演化发展具有重要意义。
The supplemental regional geological survey project of 1:250 000 Datong Sheet has got productive achievements.( 1) The division of tectonic units and the mineralogical compositions were studied,and characteristics of deformation and metamorphism on different tectonic units were also investigated. Evolution sequence and model of Early Precambrian tectonic events were determined. The Datong sheet area tectonic history was established.( 2) A brand new view for rediscovering and deconstruction that Jining Group is consisted of metamorphic plutonic and metamorphic superficial crust rocks was proposed. Detailed investigation was carried out on the sedimentary layer in the area. The stratigraphic framework was established comprehensively and systematically. New data was collected on chronostratigraphic and biostratigraphic division.( 3) The metamorphic plutonite in the sheet has been divided into four magmatic belts. Deconstruction and division for metamorphic plutonite in each belt has been done.( 4) The spatial,petrochemical and geochemical characteristics for Mesozoic intrusive rocks in the area were discovered. The petrogenesis and tectonic background were analyzed.( 5) Comprehensive and systematic research on metamorphism characteristics,metamorphic facies zone division and the characteristics of metamorphic minerals of Early Precambrian metamorphic rocks has been completed. The mineral assemblage and generation relationship on different massif has been ascertained.( 6) The tectonic framework in the sheet was established by systematic research on tectonic features. The Early Precambrian structure-deformation styles were compartmentalized into four-time deformations belonging to Wutai and Luliang deformation-phase. The authors identified the matching relationship on fractures with different directions,phases and characters in the basins by investigating the Mesozoic tectonics in the area,and clarified the spatial distribution,properties,fracture combination and movement characteristics of the large-scale Majiatan thrust nappe belt located in western margin of Datong basin.This paper has great significance for research of Shanxi Meso-Cenozoic basin's development.
The supplemental regional geological survey project of 1:250 000 Datong Sheet has got productive achievements.( 1) The division of tectonic units and the mineralogical compositions were studied,and characteristics of deformation and metamorphism on different tectonic units were also investigated. Evolution sequence and model of Early Precambrian tectonic events were determined. The Datong sheet area tectonic history was established.( 2) A brand new view for rediscovering and deconstruction that Jining Group is consisted of metamorphic plutonic and metamorphic superficial crust rocks was proposed. Detailed investigation was carried out on the sedimentary layer in the area. The stratigraphic framework was established comprehensively and systematically. New data was collected on chronostratigraphic and biostratigraphic division.( 3) The metamorphic plutonite in the sheet has been divided into four magmatic belts. Deconstruction and division for metamorphic plutonite in each belt has been done.( 4) The spatial,petrochemical and geochemical characteristics for Mesozoic intrusive rocks in the area were discovered. The petrogenesis and tectonic background were analyzed.( 5) Comprehensive and systematic research on metamorphism characteristics,metamorphic facies zone division and the characteristics of metamorphic minerals of Early Precambrian metamorphic rocks has been completed. The mineral assemblage and generation relationship on different massif has been ascertained.( 6) The tectonic framework in the sheet was established by systematic research on tectonic features. The Early Precambrian structure-deformation styles were compartmentalized into four-time deformations belonging to Wutai and Luliang deformation-phase. The authors identified the matching relationship on fractures with different directions,phases and characters in the basins by investigating the Mesozoic tectonics in the area,and clarified the spatial distribution,properties,fracture combination and movement characteristics of the large-scale Majiatan thrust nappe belt located in western margin of Datong basin.This paper has great significance for research of Shanxi Meso-Cenozoic basin's development.
引文
[1]卢良兆,徐学纯,刘福来.中国北方早前寒武纪孔兹岩系[M].长春:长春出版社,1996.
[2]杨振生,徐仲元,刘正宏.孔兹岩系事件与太古宙地壳构造演化[J].前寒武纪研究进展,2000,23(4):206-212.
[3]沈其韩,刘敦一,王平,等.内蒙集宁群变质岩系U-Pb和Rb-Sr协同位素年龄的讨论[J].地球学报,1987,9(2):165-178.
[4]吴昌华,钟长汀,陈强安.晋蒙高级地体孔兹岩系的时代[J].岩石学报,1997,13(3):289-302.
[5]吴昌华,李惠民,钟长汀,等.内蒙古黄土窑孔兹岩系的锆石与金红石年龄研究[J].地质论评,1998,44(6):618-626.
[6]王惠初,袁桂邦,辛后田.内蒙古固阳村空山地区麻粒岩的锆石U-Pb年龄及其对年龄解释的启示[J].地质调查与研究,2001,24(1):28-34.
[7]郭敬辉,石昕,卞爱国,等.桑干地区早元古代花岗岩长石Pb同位素组成和锆石U-Pb年龄:变质与地壳熔融作用及构造-热事件演化[J].岩石学报,1999,15(2):199-207.
[8]万渝生,耿元生,刘福来,等.华北克拉通及邻区孔兹岩系的时代及对太古宙基底组成的制约[J].前寒武纪研究进展,2000,23(4):221-237.
[9]刘金中,陈亚平,钱祥麟.大同—兴河孔兹岩系原始构造环境的研究[C]//岩石圈地质科学.北京:北京大学出版社,1994:61-68.
[10]山西省地质矿产局.山西省区域地质志[M].北京:地质出版社,1989.
[11]山西省地质矿产局.山西省岩石地层[M].武汉:中国地质大学出版社,1997.
[12]徐朝雷.中浅变质岩区填图方法[M].太原:山西科学教育出版社,1990:27-69.
[13]陈亚平,刘金中,钱祥麟.山西大同以北地区太古代基性岩成因[J].山西地质,1990,5(3):235-247.
[14]侯贵廷,李江海,钱祥麟.晋北地区中元古代岩墙群的地球化学特征和大地构造背景[J].岩石学报,2001,17(3):352-357.
[15]苗培森,张振福.不同构造机制韧性剪切带研究[J].中国区域地质,1995(4):353-359.
[16]宋鸿林.构造动力学中的显微构造研究[J].当代地质科学前沿,1983,3(4):178-183.
[17]苗培森.恒山中深变质岩区构造样式[M].天津:天津科学技术出版社,2003:1-77.
[18]张臣.大同—集宁地区太古代变质杂岩的构造变形特征[J].华北地质矿产杂志,1994,9(1):65-73.
[19]王同合.晋陕地区地质构造演化与油气聚集[J].华北地质矿产杂志,1995,10(3):283-398.
[20]赵明鹏,Lütge H.山西口泉断裂与大同侏罗纪煤田的关系[J].华北地质矿产杂志,1996,11(1):93-98.
[21]张兆琪.山西大同口泉山隆升-挠褶构造研究[J].地质调查与研究,2008,31(4):291-296.
[22]张兆琪,王权,刘成如.山西宁武贾家窑隆起-挠褶构造研究[J].地质学刊,2011,35(4):249-253.
[23]张兆琪.地震与构造[M].太原:山西科学技术出版社,2016.
[2]杨振生,徐仲元,刘正宏.孔兹岩系事件与太古宙地壳构造演化[J].前寒武纪研究进展,2000,23(4):206-212.
[3]沈其韩,刘敦一,王平,等.内蒙集宁群变质岩系U-Pb和Rb-Sr协同位素年龄的讨论[J].地球学报,1987,9(2):165-178.
[4]吴昌华,钟长汀,陈强安.晋蒙高级地体孔兹岩系的时代[J].岩石学报,1997,13(3):289-302.
[5]吴昌华,李惠民,钟长汀,等.内蒙古黄土窑孔兹岩系的锆石与金红石年龄研究[J].地质论评,1998,44(6):618-626.
[6]王惠初,袁桂邦,辛后田.内蒙古固阳村空山地区麻粒岩的锆石U-Pb年龄及其对年龄解释的启示[J].地质调查与研究,2001,24(1):28-34.
[7]郭敬辉,石昕,卞爱国,等.桑干地区早元古代花岗岩长石Pb同位素组成和锆石U-Pb年龄:变质与地壳熔融作用及构造-热事件演化[J].岩石学报,1999,15(2):199-207.
[8]万渝生,耿元生,刘福来,等.华北克拉通及邻区孔兹岩系的时代及对太古宙基底组成的制约[J].前寒武纪研究进展,2000,23(4):221-237.
[9]刘金中,陈亚平,钱祥麟.大同—兴河孔兹岩系原始构造环境的研究[C]//岩石圈地质科学.北京:北京大学出版社,1994:61-68.
[10]山西省地质矿产局.山西省区域地质志[M].北京:地质出版社,1989.
[11]山西省地质矿产局.山西省岩石地层[M].武汉:中国地质大学出版社,1997.
[12]徐朝雷.中浅变质岩区填图方法[M].太原:山西科学教育出版社,1990:27-69.
[13]陈亚平,刘金中,钱祥麟.山西大同以北地区太古代基性岩成因[J].山西地质,1990,5(3):235-247.
[14]侯贵廷,李江海,钱祥麟.晋北地区中元古代岩墙群的地球化学特征和大地构造背景[J].岩石学报,2001,17(3):352-357.
[15]苗培森,张振福.不同构造机制韧性剪切带研究[J].中国区域地质,1995(4):353-359.
[16]宋鸿林.构造动力学中的显微构造研究[J].当代地质科学前沿,1983,3(4):178-183.
[17]苗培森.恒山中深变质岩区构造样式[M].天津:天津科学技术出版社,2003:1-77.
[18]张臣.大同—集宁地区太古代变质杂岩的构造变形特征[J].华北地质矿产杂志,1994,9(1):65-73.
[19]王同合.晋陕地区地质构造演化与油气聚集[J].华北地质矿产杂志,1995,10(3):283-398.
[20]赵明鹏,Lütge H.山西口泉断裂与大同侏罗纪煤田的关系[J].华北地质矿产杂志,1996,11(1):93-98.
[21]张兆琪.山西大同口泉山隆升-挠褶构造研究[J].地质调查与研究,2008,31(4):291-296.
[22]张兆琪,王权,刘成如.山西宁武贾家窑隆起-挠褶构造研究[J].地质学刊,2011,35(4):249-253.
[23]张兆琪.地震与构造[M].太原:山西科学技术出版社,2016.