西秦岭下三叠统江里沟组构造环境和物源特征 ——来自碎屑岩地球化学、锆石U-Pb年代学的约束

甘肃省夏河—合作地区是西秦岭重要的金矿富集区之一,下三叠统江里沟组是区内主要的赋矿地层,主要岩性有长石砂岩、泥质板岩.砂板岩中SiO2=53.2％～69.34％,平均值62.36％;Al2O3=10.80％～17.46％,平均值14.20％;FeO=0.45％～4.85％,平均值3.31％;CaO=1.92％～7.66...     

Abundance and characteristics of microplastics in shellfish from Jiaozhou Bay,China

As an emerging pollutant, the presence of microplastics in marine organisms has been concerned increasingly. Shellfish, which are both economically and ecologically important, are of particular concern.In this study, we investigated the microplastic pollution in wild and farmed oysters( Crassostrea gigas) and clams( Ruditapes philippinarum) in the Jiaozhou Bay, China, for the first time. We found the microplastic pollution in shellfish in Jiaozhou Bay was at a moderate level. The abundance of mi...