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北部湾沉积物中自生针铁矿与菱锰矿团粒的研究
陈丽蓉1, 张秀荣1
中国科学院海洋研究所
摘要:
本文对富集于北部湾西部(红河口一带)12个测站表层沉积物中的红褐色、黑褐色、褐色与浅揭黄色团粒进行了矿物学特征的研究。分析资料说明,红褐色和黑褐色团粒为自生的针铁矿团粒。褐色与浅褐黄色团粒则为自生菱锰矿团粒。这两种团粒共生于同一地区,其所需的铁、锰物质来源于红河,当红河物质入海后,由于介质条件发生变化,其中的铁、锰离子发生凝聚而沉淀,形成上述各式团粒。
关键词:  针铁矿  菱锰矿
DOI：
分类号:
基金项目:
STUDY ON AUTHIGENIC GEOTHITE AND MANGAN SPARPELLETS IN THE SEDIMENT OF THE BEIBUGULF OF TONKIN
Abstract:
In this paper, mineralogy on the red-brown, black-brown, brown and light brown-yellow pellets from the western part of the Beibu Gulf of Tonkin(near the mouth of the Red, River) is studied. These pellets were collected from the 12 stations in this area. The results of our study showed that the red-brown and black-brown pellets are authigenic geothite while the brown and light brown-yellow pellets are authigenic mangan spar pellets. They are found in the same area. These iron and manganese are contributed from the Red River. After the materials of Red River were emptied into the Beibu Gulf the iron and manganese were condensed and deposited to form authigenic geothigenic geothite and mangan spar pellets.
Key words:  Goethite  Mangan spar
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