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doi: 10.11781/sysydz202402299
1.
成都理工大学 能源学院, 成都 610059
2.
油气藏地质与开发工程全国重点实验室(成都理工大学), 成都 610059
3.
西华大学, 成都 610039
详细信息
成都理工大学 能源学院, 成都 610059
油气藏地质与开发工程全国重点实验室(成都理工大学), 成都 610059
西华大学, 成都 610039
Characteristics and sedimentary geological significance of tempestites in first member of Lower Cambrian Canglangpu Formation in north central Sichuan Basin
1.
College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2.
State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China
3.
Xihua University, Chengdu, Sichuan 610039, China
College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China
State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China
Xihua University, Chengdu, Sichuan 610039, China
图 1 四川盆地研究区位置(a)及沧浪铺组地层柱状图(b)
据参考文献[42]修改。
Figure 1. Location of study area (a) and stratigraphic column of Canglangpu Formation (b) in Sichuan Basin
图 2 川中北部沧浪铺组一段风暴沉积构造特征
a.Ps7井,6 752.41~6 752.80 m,冲刷面,砾屑层;b.Db1井,5 953.50~5 953.61 m,冲刷面,板刺状砾屑;c.Ct1井,6 300.48~6 300.64 m,底冲刷构造,砾屑层;d.Ct1井,6 299.78~6 299.93 m,砾屑层,见砾屑呈菊花状构造排列;e.Ct1井,6 294.40~6 294.66 m,砾屑层,向上平行层理发育;f.Db1井,5 943.67~5 943.78 m,粒序层,平行层理;g.Ps7井,6 757.08~6 757.25 m,风暴扰动构造;h.Db1井,5 951.91~5 952.11 m,平行层理,丘状交错层理;i.Ct1井,6 288.26~6 288.46 m,透镜状纹理;j.Ps7井,6 744.77 m,含粉砂泥岩,水平层理,×2.5,单偏光;k.Ct1井,6 288.78 m,含砂泥岩,水平层理、透镜状纹层,×2.5,单偏光;l.Db1井,5 917.56 m,鲕粒白云岩,砾屑,×5,单偏光;m.Db1井,5 914.97 m,含泥粉砂岩,粒序层,×5,单偏光;n.Ps7井,6 789.32 m,鲕粒灰岩,溶蚀孔缝,×5,单偏光;o.Db1井,5 945.85 m,鲕粒白云岩,晶间孔沥青充填,×5,单偏光。
Figure 2. Structural characteristics of storm sedimentation of first member of Canglangpu Formation in north central Sichuan Basin
图 3 川中北部地区沧浪铺组一段风暴沉积序列
a.Db1井,深灰色含砾屑细鲕白云岩,5 913.55~5 913.94 m,风暴沉积A+C+D段;b.Db1井,深灰色波状到丘状纹层粉砂质泥岩,5 954.45~5 954.56 m,风暴沉积C+D+E;c.Ct1井,深灰色灰色细鲕灰岩,6 295.23~6 295.36 m,风暴沉积A+B;d.Ct1井,深灰色含泥细鲕灰岩,6 281.70~6 281.92 m,风暴沉积B+C+D;e.Ct1井,深灰色亮晶鲕粒灰岩,6 299.78~6 299.93 m,风暴沉积A段。
Figure 3. Storm sedimentation sequences of first member of Canglangpu Formation in north central Sichuan Basin