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海南岛鹿回头水尾岭海滩岩中的微生物碳酸盐沉积研究 被引量:3

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摘要 般呈叠层状、薄的结壳状、穹状、微生物石等多种形态生长,黏结细小的生物碎屑,大多具有微生物的管形丝状体和纹层状的生长纹.珊瑚骨骼孔穴中的微生物碳酸盐沉积呈叠层的尖锥体,生长方向不定,随珊瑚骨骼孔穴的延伸方向生长,具有清晰的生长纹层,显示明显的阶段性,是隐生微生物碳酸盐沉积的一种独特发育形式.微生物成因的胶结物多以针纤状方解石、钙化的菌类丝状体和莓状钙球的形式出现,并以针纤状方解石最为常见.这表明微生物活动和微生物碳酸盐沉积在热带海洋受季风影响下的以碳酸盐为主要成分的海滩岩形成中起着重要的作用.研究工作第一次发现和描述了我国南海北部海岸海滩岩中的微生物碳酸盐沉积和与微生物活动有关的胶结物,研究结果支持海滩岩中的胶结物部分是源于微生物成因的,肯定了微生物在碳酸盐沉积方面的重要作用,从一个新的研究角度拓宽了海滩岩的认知领域.
出处 《中国科学(D辑)》 CSCD 北大核心 2007年第10期1338-1348,共11页 Science in China(Series D)
基金 中国科学院"百人计划"项目 国家自然科学基金(批准号:40472067 40572072) 中国科学院边缘海地质重点实验室基金(编号:MSGL0601)资助
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