贵州瓮安生物群和磷矿形成的沉积地球化学研究  

Sedimentary Geochemistry Research on the Radiation of Weng'an Biota and the Formation of the Phosphorite Ore Deposit,Guizhou

作　　者：郭庆军[1] 杨卫东[1] 刘丛强[1] Harald Strauss 王兴理[1] 赵元龙[3] 

机构地区：[1]中国科学院地球化学研究所 [2]Geologisch-Pal~ontologisches Institut,Universit~t Mnster [3]贵州工业大学资源和环境工程学院,贵阳550003

出　　处：《矿物岩石地球化学通报》2003年第3期202-208,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目 (4 0 0 72 0 47与 40 2 3 2 0 2 0 )

摘　　要：运用沉积学和元素地球化学的理论和方法 ,通过对瓮福磷矿陡山沱组地层古地理背景与沉积环境分析 ,进一步揭示沉积记录中热水作用的客观存在性。研究认为 ,上震旦统陡山沱组“瓮安生物群”繁盛及磷块岩富集与海底热水喷流活动存在联系 ,热水活动在海洋生物的繁盛和海洋磷的运移过程中可能扮演了一个极其重要的角色 ,在缺氧带和亚氧化带的大量细菌对磷的分解和有影响力的铁 硫酸盐的循环作用下 ,富集的磷在海底上升洋流作用下 ,运移到氧化还原界面上富集成矿。It is revealed the existence of hyd ro thermal activity in the sediment record based on analyzing paleo-geography bac kground and sedimentary environment at the Weng'an-Fuguan phosphorites deposi t of Doushantuo system of the Precambrian-Cambrian transitional period, using t he sedimentary and elemental geochemical methodology. The study reveals that the submarine hydrothermal eruption has something to do with the explosion of 'Wen g'an biota' and the formation of the phosphorites and has played an important role in marine biology blooming and phosphorus transportation, and that the dec omposition of bacterially mediated phosphorous and redox-mediated iron-phospha te cycling may lead to abundant stromatolite which absorbed dissolved phosphate in the anoxic and sub-oxic zones, and which were tran sported in rising sea-f luid then from seabed to the above redox floor to form phosphorite deposit.

关 键 词：瓮安生物群 贵州 磷矿床 沉积学 元素地球化学 热水作用 海底热水喷流活动 晚震旦世 

分 类 号：P619.213[天文地球—矿床学] Q911.6[天文地球—地质学]