Extensional tectonics in Shimian-Mianning district, Sichuan
-
摘要: 研究区在中生代造山过程中 ,以穹隆状变形变质体发育为特征。可分为岩浆核杂岩和变质核杂岩。前者位于地槽区 ,具前造山期隆—滑构造变形、造山期和后造山期的收缩及伸展变形的演化 ,与碲矿关系密切 :后者位于地台区 ,经历了伸展滑脱、逆冲—推覆和平移剪切变形过程 ,对区内金矿的形成、分布起重要控制作用Abstract: The study areas are characterized by the well developed dome deformation and metamorphism rocks during the Mesozoic orogenic phases, and the rocks in the areas can be divided into two types: igneous nucleus complex and metamorphic nucleus complex. The former is situated in geosynclinal area, showing the evolutional characteristics of dome and glide deformation of pre orogenic stage, contracted and extensional deformation of orogenic and post orogenic phase, and is relative with tellurium deposit greatly. The latter is located in a platform, and its tectonic evolution includes extensional decollement, thrust nappe, strike slip and shear deformation, which play a great role in controlling the formation and distribution of gold deposits in the areas.
-
-
[1] 喻安光 ,郭建强 .扬子地台西缘构造格局 [J].中国区域地质 ,1998,17( 3 ) :2 5 5 - 2 61.
[2] 骆耀南主编 .扬子地台西南缘陆内造山带地质与矿产论文集 [C].成都 :科技出版社 ,1996,1- 12 .
[3] 侯立玮 .扬子克拉通西缘穹隆状变形变质体的类型与成因 [J].四川地质学报 ,1996,16( 1) :6- 11.
[4] 杨振升 ,李三忠 ,刘永江 .大陆造山带中的隆—滑构造 [J].长春地质学院学报 ,1995 ,2 5 ( 4 ) :3 61- 3 67.
[5] 骆耀南 ,傅德明 ,周绍东等 .四川石棉大水沟碲矿床地质与成因 [J].四川地质学报 ,1994 ,14 ( 2 ) :10 0 - 110 .
[6] 傅昭仁 ,李德威 ,李先福等 .变质核杂岩及剥离断层的控矿构造解析 [M].武汉 :中国地质大学出版社 ,1992 ,1- 13 .
[7] 喻安光 ,郭建强 .扬子地台西缘韧性剪切带对金矿的控制特征 [J].四川地质学报 ,1997,17( 4 ) :2 62 - 2 67.
-
计量
- 文章访问数: 129
- PDF下载数: 1
- 施引文献: 0
下载: