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| 同步辐射X射线荧光微探针技术测定太古宙条带状硅铁建造中硅质条带及包裹体的微量元素 | |
| 引用本文： | 孟凡巍,袁训来,周传明,李葵发,黄宇营,何伟.同步辐射X射线荧光微探针技术测定太古宙条带状硅铁建造中硅质条带及包裹体的微量元素[J].岩石学报,2007,23(9):2079-2084. |
| 作者姓名： | 孟凡巍 袁训来 周传明 李葵发 黄宇营 何伟 |
| 作者单位： | 1. 中国科学院南京地质古生物所,南京,210008;南京大学内生金属矿床成矿机制研究国家重点实验室,地质流体研究所,地球科学系,南京,210093 2. 中国科学院南京地质古生物所,南京,210008 3. 长江大学,荆州,434023 4. 中国科学院高能物理研究所,北京,100010 |
| 基金项目： | 国家自然科学基金;国家自然科学基金;科技部国际科技合作计划;国家重点基础研究发展计划(973计划);中国科学院知识创新工程项目;中国博士后科学基金;南京大学博士后基金的经费 |
| 摘 要： | 通过对35亿年前曹庄岩组的条带状硅铁建造(BIF)的硅质条带以及石英中包裹体微量元素的分析,初步探讨了35亿年前的 BIF 形成时期海洋的化学成分。结果表明太古宙海洋中贫乏 P、V、Cu 等生命元素,限制了真核生物的发展,而其它微量元素高度富集,为化学自养细菌提供了良好的环境。在 BIF 的硅质条带的形成过程中,微量元素的含量受到磁铁矿沉积吸附的强烈控制。 |
| 关 键 词： | 条带状硅铁建造 包裹体 微量元素 硅质条带 吸附 |
| 文章编号： | 1000-0569/2007/023（09）-2079-84 |
| 修稿时间： | 2007-01-20 |
Measurements of trace elements in silica of Early Archean's banded iron formation and primary inclusion in them by Synchrotron Radiation X-ray fluoresence microprobe techniques |
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| MENG FanWei,YUAN XunLai,ZHOU ChuanMing,LI KuiF,HUANG YuYing and HE Wei.Measurements of trace elements in silica of Early Archean''''s banded iron formation and primary inclusion in them by Synchrotron Radiation X-ray fluoresence microprobe techniques[J].Acta Petrologica Sinica,2007,23(9):2079-2084. | |
| Authors: | MENG FanWei YUAN XunLai ZHOU ChuanMing LI KuiF HUANG YuYing and HE Wei |
| Institution: | 1. Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China ;2. State Key Laboratory for Mineral Deposits Research,lnstitute of geofluids, Department of Earth Sciences, Nanjing University, Nanjing 210093, China; 3. Changjiang University, Jingzhou 434023, China ;4. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100010, China |
| Abstract: | We study the content of trace elements in silica of Early Archean's banded iron formation and primary inclusion in them by Synchrotron Radiation X-ray fluoresence microprobe techniques,and conclude the chemistry of sea water before 3.5Ga.We find the absent of K,P,V et al.,to constraint the advance of life.But the other elements are abundant,and it is fit for bacteria.The content of trace elements are adsorbed by Fe-oxide sediment,so the trace elements content in early Archean sea was controlled by Fe-oxide sediment and bacteria activity. |
| Keywords: | Banded iron formation Fluid inclusion Trace element Silica band Adsorption |
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