Garnierite mineralization from a serpentinite-derived lateritic regolith, Sulawesi Island, Indonesia: Mineralogy, geochemistry and link to hydrologic flow regime
文献类型：期刊论文
| 作者 | Zeng, Xiangwei3; Fu, Wei3,4; Zhang, Yinmeng3; Lin, Henry1,2,4; Shao, Ya3; Yang, Mengli3; Huang, Xiaorong3; Pang, Chongjin3 |
| 刊名 | JOURNAL OF GEOCHEMICAL EXPLORATION
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 188期号:2018页码:240-256 |
| 关键词 | Garnierite Hydrologic Flow Regime Preferential Water Flow Ni Geochemistry Lateritic Ni Deposit |
| DOI | 10.1016/j.gexplo.2018.01.022 |
| 文献子类 | Article |
| 英文摘要 | Garnierite represents a significant nickel ore in many lateritic Ni deposits worldwide. To gain a better understanding of its nature and origin, a well-developed garnierite-hosting transect from the Kolonodale area of East Sulawesi, Indonesia, has been investigated using field geology, mineralogy and geochemical data. Garnierite occurs mainly in veins in the lower saprolite of a serpentinite-derived regolith. Mineralogically, it can be determined as an intimate mixture of Ni-rich serpentine-like (lizardite-Nepouite) and talc-like (kerolite-pimelite) phases. Results of EMP analyses indicate that Ni is preferentially enriched in the talc-like phases rather than the serpentine-like phases. A sequential precipitation of mineral phases progressively enriched in Ni and Si to form garnierite during weathering is suggested. The Ni-lizardite (2.63-8.49 wt% Ni) with elevated Fe (4.02-6.44 wt %) may have been inherited from saprolite in a first instance and enriched in Ni by cation exchange processes. Newly precipitated minerals are kerolite-pimelite (7.84-23.54 wt% Ni) and then followed by Ni-free quartz. Minor amount of Nepouite (23.47-28.51 wt% Ni) occur in laths along shrinkage cracks of previously formed minerals, indicating a late stage paragenetic sequence. With emphasis on a hydrologic consideration, indicators of a preferential flow regime are identified in the garnierite-hosting regolith, including: (i) non-uniform pattern of the garnierite field occurrence, (ii) syn-weathering active nature of the garnierite-hosting structures, (iii) close relationship between the garnierite occurrence and vertical FeeMn oxides pipes as well as FeeMn oxides patched areas, and (iv) specific physico-chemical property of the garnierite location with higher organic matter concentrations but lower pH values compared to surroundings. It is proposed that the origin of garnierite is closely linked to a preferential flow of oversaturated solutions through accessible conduits in the regolith. Garnierite features as colloidal nature, high organic matter and low pH are key-parameters in metal transport and deposition. |
| WOS关键词 | PREFERENTIAL FLOW ; NEW-CALEDONIA ; SOLID-SOLUTIONS ; SOIL CHEMISTRY ; EAST SULAWESI ; ORE-DEPOSITS ; WATER-FLOW ; NICKEL ; SUBSURFACE ; PATHS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000428134600019 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5219]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 作者单位 | 1.Xian AMS Ctr, Shanxi Key Lab Accelerator Mass Spectrometry Tech, Xian 710061, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.Guilin Univ Technol, Guangxi Key Lab Hidden Metall Ore Deposits Explor, Guilin 541004, Peoples R China 4.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA |
| 推荐引用方式 GB/T 7714 | Zeng, Xiangwei,Fu, Wei,Zhang, Yinmeng,et al. Garnierite mineralization from a serpentinite-derived lateritic regolith, Sulawesi Island, Indonesia: Mineralogy, geochemistry and link to hydrologic flow regime[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2018,188(2018):240-256. |
| APA | Zeng, Xiangwei.,Fu, Wei.,Zhang, Yinmeng.,Lin, Henry.,Shao, Ya.,...&Pang, Chongjin.(2018).Garnierite mineralization from a serpentinite-derived lateritic regolith, Sulawesi Island, Indonesia: Mineralogy, geochemistry and link to hydrologic flow regime.JOURNAL OF GEOCHEMICAL EXPLORATION,188(2018),240-256. |
| MLA | Zeng, Xiangwei,et al."Garnierite mineralization from a serpentinite-derived lateritic regolith, Sulawesi Island, Indonesia: Mineralogy, geochemistry and link to hydrologic flow regime".JOURNAL OF GEOCHEMICAL EXPLORATION 188.2018(2018):240-256. |
入库方式： OAI收割
来源：地球环境研究所
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