南海神狐海域四条天然气水合物钻探岩心含有大量自生黄铁矿,主要为长条状、短柱状和充填有孔虫。黄铁矿主要出现在沉积物浅部和含水合物层,含量主要在20%～90%之间,水合物层是黄铁矿高含量的赋存层位。浅部黄铁矿主要受有机碳和甲烷缺氧氧化控制,而深部水合物层的黄铁矿形成主要受高的甲烷通量影响。 The four natural gas hydrate drilling cores in the Shenhu area of ​​the South China Sea contain a large amount of authigenic pyrite, mainly of long strip, short column and foraminifer. Pyrite is mainly found in the shallow sediments and hydrate layers, the content of which is between 20% and 90%, and the hydrate layer is a high-level layer of pyrite. Shallow pyrite is mainly controlled by organic carbon and methane anoxia, while pyrite formation in the deep hydrate layer is mainly affected by high methane flux.