EVALUATION OF THE MUTAGENIC EFFECT OF OYSTERS OLLE-CTED NEAR A REFINERY.

There is a growing concern adout the genetic riskproduced by contamination of coastal lagoons alongthe Gulf of Mexico,it was found recently that oys-ters (Crassostrea virginica) collected from an es-tuary located near the Refinery of Cd.Madero,Tam-ps.,had high amounts of both,hydrocarbons and hea-vy metals.The concentrations of Va,Cr,Fe,Ni,

卡林矿带金矿床规模分布的研究

卡林矿带是北美最重要的黄金产区。根据已知矿床规模的数据,进行了矿床规模的累积频率分布研究。结果认为.卡林矿带仍然是一个未完成的勘探地区,重大新发现的潜力仍然很高。