多重地层划分理论及其在四川盆地寒武系底界划分中的应用  

MULTIPLE-STRATIGRAPHIC DIVISION THEORY AND ITS APPLICATION TO DIVIDING CAMBRIAN BOTTOM BOUNDARY OF SICHUAN BASIN

作　　者：邓鸿斌[1] 满玲[1] 陈文[1] 洪海涛[1] 刘鑫[1] 

机构地区：[1]中国石油西南油气田公司勘探开发研究院

出　　处：《天然气勘探与开发》2013年第1期1-4,11,共5页Natural Gas Exploration and Development

摘　　要：四川盆地寒武系的底界,既存在与中国乃至全球一致的生物地层界线,完全对应于年代地层单位界线,其界线点为第一个小壳化石带Anabarites-Protohertzina-Arthrochites组合带之底;同时还存在一条生产上实用的辅助界线,即岩石地层单位界线,界线点为碳酸盐岩和碎屑岩的分界,完全对应于测井曲线伽玛值突然降低的界线。从多重地层划分理论的角度来说,这两类界线都是合理并实用的,很好地解决了寒武系与震旦系分界线长期争论的问题。In Cambrian bottom boundary of Sichuan Basin,there exist both a biostratigraphic boundary and a lithostratigraphic boundary.The former corresponds to the boundary of chronostratigraphic unit.Its boundary point is the bottom of the first small shelly fossil belt(Anabarites-Protohertzina-Arthrochites).The latter,also a functional and assistant one used for exploration,corresponds to the boundary at which gamma value of well-logging curve decreases suddenly.Its boundary point is the boundary of carbonate and clastic rocks.In terms of multiple-stratigraphic division theory,those two boundaries are reasonable and practical,and they solve the boundary problem of Cambrian and Sinian.

关 键 词：多重地层划分理论 寒武系底界 岩石地层单位 生物地层单位 年代地层单位 测井地层单位 

分 类 号：P618.13[天文地球—矿床学] P631.81[天文地球—地质学]