• 责任者：Zhang Mei (Department of Earth Sciences ; Sun Yat-Sen University ; Guangzhou 510275 ; China) ; Sun Xiaoming
• 刊名：Mineral Deposits
• 出版年：2011
• 卷期：30(4)
• 关键词：天然气水合物 ; gas hydrates ; 黄铁矿 ; pyrite ; 台西南盆地 ; Southwest Taiwan Basin
• 页码：p.725-734
• 图表：4 illus., 36 refs.
• 分类号：0700
• 出版序号：800
• issnNo：ISSN0258-7106
• isbnNo：CN11-1965/P

 A lots of authigenic tube pyrites were collected from sediments in core GC10 from Southwest Taiwan Basin, South China Sea, which constitute a major product of anoxic sulfate reduction in marine sediments. Observation under SEM and HRTEM shows that the tube pyrite consists of pyrite framboids with varied layers: The inner layer consists of single large-sized pyrite framboids, with a diameter of about 40 μm. The medium layer is packed with pyritohedron consisting of a framboidal core with an outer crust. And the outer layer is pyrite with some other minerals. HRTEM observation shows that the framboidal pyrite has plane defects. All this means that the pyrite framboids were formed under anoxic to locally oxidizing conditions.