三角洲和浊积扇砂体的粒度参数散点图及其判别函数

DISCRIMINANT FUNCTION AND DISPERSAL MAP OF GRAIN SIZE PARAMETERS FOR DELTA AND TURBIDITE FAN SANDBODIES

朱筱敏 信荃麟

Zhu Xiaomin Xin Quanlin

本文利用粒度参数散点图区分了三角洲和深水浊积扇砂体,指出粒度参数偏度和标准偏差是粒度参数散点图中区分砂体成因类型的有效参数。鉴于常用的B. K. Suhu判别公式对判断陆相断陷湖盆中的砂体成因有一定的局限性,作者利用粒度参数建立了判别砂体成因的判别函数,从而得出较满意的结果。

The sandbodies of delta and turbidite fan have been distinguished with the dispersal map of grain size parameters. It is indicated that the skewness and standard deviation are effective parameters in distinguishing the origin of the sand-bodies. In view of the limitation of B. K. Suku's discriminant in distinguishing the origin of the sandbodies for fualt-depressed lacustrine basins, the author have established a new discriminant function with grain size parameters, and gained a satisfying result.

10.11743/ogg19870310