检索结果-南通市图书馆

Geochemistry of Rhenium and Other Trace Elements in Molybdenite,Sar Cheshmeh Porphyry Cu-Mo Deposit,Iran

Acta Geologica Sinica(English Edition) 2021年第4期95卷 1217-1235页

作者： behnam shafiei bafti Martin SVOJTKA Mehdi ABDOLAHI Department of Geology Faculty of ScienceGolestan UniversityGorganIran Department of Geology Faculty of ScienceShahid Bahonar University of KermanKermanIran Institute of Geology of the Czech Academy of Sciences PragueCzech Republic Geology Office Mining AffairsSar Cheshmeh Copper ComplexRqfsanjanIran

LA-ICP-MS analysis of molybdenite from the Sar Cheshmeh porphyry Cu-Mo deposit(PCD),Iran,shows moderate concentration of Re(average~207 ppm)and low concentration of chalcogenides(average of Pb+Te+Bi,~31 ppm)as well as metalloids(average of As+Sb+Ge,~4.5 ppm).The early-formed quartz–molybdenites associated with potassic alteration are characterized by moderately low concentration of Re(21–215 ppm with an average of 83 ppm),whereas the transitional quartz–molybdenite veins related to the sericitic stage of mineralization contain more Re(62–465 ppm,with an average of 207 ppm).In contrast,the late-formed quartz–molybdenite veins associated with phyllic alteration show the highest concentration of Re(up to 1273 ppm with an average of 395 ppm).Gradual increase in Re content of molybdenites deposited throughout the evolution of the porphyry system is probably related to elevated fO_(2) and acidic conditions of the ore fluids governing the transitional and late stage of mineralization,when compared to the moderately low fO_(2) and basic conditions of the ore fluids precipitating the low-Re molybdenites associated with potassic *** mixed mantle/crustal source of the ore-related magma and its fractionated composition in Sar Cheshmeh are consistent with magmatic conditions for the formation of Mo-rich and Re-poor PCDs in the world.

关键词： rhenium molybdenite LA-ICP-MS porphyry Cu Sar Cheshmeh Iran

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Saqez–Sardasht Goldfield,North Sanandaj-Sirjan Zone,Iran:A Tectono-Metallogenic Synthesis

引用

Acta Geologica Sinica(English Edition) 2020年第5期94卷 1693-1710页

作者： Erfan HAJI Hojjatollah SAFARI behnam shafiei bafti Mehdi MOJALLAL Department of Geology Faculty of SciencesUniversity of KurdistanSanandajIran Department of Geology Faculty of SciencesGolestan UniversityGorganIran

The Sanandaj–Sirjan Zone(SSZ),as the metamorphic-magmatic core of the Zagros Orogen in southwestern Iran,contains several styles of gold deposit of Phanerozoic *** northern SSZ includes an ENE-trending goldfield *** area that encompasses the main orogenic gold deposits,e.g.,Qolqoleh,Kervian,Qabaqhlujeh,and the Barika VMS goldfield,was chosen for this research to study the spatial and temporal relationships between gold mineralization and orogenic *** the rock unit variations,metamorphism,magmatism and the settings of the structures,the study area is divided into four distinct tectonic blocks,separated by three main NW-trending thrust faults(suture lines)including,from NE to SW,the Tamugheh,the Ebrahim Hesar and the Zagros main thrust(ZMT)*** area between the Tamugheh and Ebrahim Hesar faults is a tectonized/uplifted basement of accretionary wedge-originated thrust slivers,hosting the above orogenic gold *** other area between the here termed Ebrahim Hesar fault and the ZMT is an island-arc basin,proposed here as the Sardasht–Barika zone,including the only recognized massive sulfide gold district all over the SSZ,named *** Barika goldfield was metamorphosed,deformed and enriched due to the islandarc collision to the Arabian continent,before the closure of Neotethys on the eastern flank.

关键词： tectonic evolution massive sulfide gold orogenic gold Sanandaj-Sirjan Zone Saqez-Sardasht Zone Sardasht-Barika Island Arc

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

In-vitro bioactivity evaluation and physical properties of an epoxy-based dental sealer reinforced with synthesized fluorine-substituted hydroxyapatite, hydroxyapatite and bioactive glass nanofillers

引用

Bioactive Materials 2019年第1期4卷 322-333页

作者： Bahaa Abdulrazzaq Jerri Al-Bakhsh Farhad shafiei Atieh Hashemian Kiana Shekofteh behnam Bolhari Marjan Behroozibakhsh Department of Dental Biomaterials School of DentistryTehran University of Medical SciencesTehranIran Department of Conservative Dentistry Dental School of University of BasraBasraIraq Department of Dental Biomaterials School of Dentistry/Research Center for Science and Technology in MedicineTehran University of Medical SciencesTehranIran Department of Endodontic School of DentistryTehran University of Medical SciencesTehranIran

The purpose of this study was to evaluate the physical properties and bioactivity potential of epoxy-based dental sealers modified with synthesized bioactive glass(BAG),hydroxyapatite(HA)and fluorine substituted hydroxyapatite(FHA)*** synthesized powders were incorporated at 10%and 20%into the epoxy-based dental *** setting time,flow and solubility and microhardness of the modified and unmodified samples were *** bioactivity was evaluated using FESEM-EDX and elemental mapping,ATR-FTIR and *** flow value of all of the experimental groups except the FHA modified samples,was greater than 20 *** solubility,no specimens exhibited more than 1%weight *** solubility value of the FHA groups was statistically significant lower than other groups(p≤0.001).The mean hardness values of all of the modified samples were significantly higher than the unmodified group(p≤0.001).Regarding bioactivity,in vitro study revealed that after 3 days immersion in SBF a compact and continuous calcium phosphate layer formed on the surface of epoxy sealers containing BAG and HA *** on these results,the addition of BAG and HA nanoparticles did not adversely alter the physical properties of epoxy ***,they improved the in vitro bioactivity of the epoxy sealer.

关键词： Bioactivity Bioactive glass Epoxy-based dental sealer Hydroxyapatite Fluorine-substituted hydroxyapatite

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：