Nano- to atomic-level analysis of heavy metals in pyrite

黄铁矿中重金属的纳米到原子级分析

• 批准号: 20840035
• 负责人: UTSUNOMIYA Satoshi
• 金额: $ 2.1万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (Start-up)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20840035/
• 关键词: パイライト; TEM; arsenian pyrite; Carlin-type deposit; Nano-scale; Toxic metals

Arsenian pyrite is an important host of Au in the Carlin-type deposit, whereas it always contains significant amount of heavy metals. In order to understand the formation process and the impact to the ambient environment, a detailed examination utilizing a variety of electron microscopy techniques was carried out on the arsenian pyrite collected from various epithermal deposits. New type of arsenian pyrite that contains As^<3+> was characterized in the sample from the Yanacocha deposit. The amounts of defect and the content of other toxic metals increases as the particle size decreases to nanometer size <10 nm. The other finding is a decoupled formation of As and Cu rich pyrite, indicating mixing of two distinct fluid conditions during its formation. In addition, an experimental study revealed the specific As-bearing minerals in the interaction between mackinawite and aqueous As under anoxic condition. Consequently, this project successfully covered a wide range of crystallochemical characteristics of pyrite in the ore deposit.

阿森尼黄铁矿是Carlin型沉积物中重要的AU寄主，而它总是包含大量的重金属。为了了解地层过程和对环境环境的影响，使用各种电子显微镜技术进行了详细的检查，从各种表皮沉积物收集的阿森尼黄铁矿上进行了详细的检查。在Yanacocha沉积物中的样品中表征了包含^<3+>的新型Arsenian黄铁矿。随着粒径降低到纳米尺寸小于10 nm，缺陷和其他有毒金属的含量增加。另一个发现是As和Cu富黄铁矿的脱钩形成，表明在形成过程中将两种不同的流体条件混合在一起。此外，一项实验研究揭示了在缺氧条件下麦基诺和水之间的相互作用中特定的含有矿物质。因此，该项目成功涵盖了矿石沉积中黄铁矿的各种晶体化学特性。

项目成果

Decoupling of Cu and As in Magmatic-hydrothermal systems: Evidence from the Pueblo Viejo Au-Ag Deposit, Dominican Republic. Goldschmidt Conference

岩浆热液系统中铜和砷的解耦：来自多米尼加共和国普韦布洛维耶霍金银矿床的证据。

• 发表时间: 2008
• 作者: Deditius A.P.;Utsunomiya S.;Kesler S.E.
• 通讯作者: Kesler S.E.

Nanoscale geochemistry and mineralogy of arsenian pyrite in ore deposits.

矿床中砷黄铁矿的纳米地球化学和矿物学。

• 发表时间: 2008
• 作者: Deditius A.P.;Utsunomiya S.;Renock D.;Reich M.;Ewing R.C.;Chryssoulis S.L.;Venter D.;Ramana C.V.;Becker U.;Kesler S.E.
• 通讯作者: Kesler S.E.

Behaviour of trace elements in arsenian pyrite in ore deposits

矿床中砷黄铁矿中微量元素的行为

• 发表时间: 2009
• 作者: Deditius A.P.;Utsunomiya S.;Kesler S.E.;Ewing R.C.;Walshe J.
• 通讯作者: Walshe J.

Chemical and structural characterization of As immobilization by nanoparticles of mackinawite (FeSm)

• DOI: 10.1016/j.chemgeo.2009.08.003
• 发表时间: 2009-10
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: D. Renock;Tanya J. Gallegos;S. Utsunomiya;K. Hayes;R. Ewing;U. Becker

Decoupling of Cu and As in Magmatic-hydrothermal systems : Evidencefrom the Pueblo Viejo Au-Ag Deposit, Dominican Republic. INVITED

岩浆热液系统中铜和砷的解耦：来自多米尼加共和国普韦布洛维耶霍金银矿床的证据。

• 发表时间: 2008
• 作者: Deditius A. P.;Utsunomiya S.;Kesler S. E.
• 通讯作者: Kesler S. E.