|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | ^(40)Ar-^(39)Ar Isotopic Dating of the Xianghualing Sn-polymetallic Orefield in Southern Hunan,China and Its Geological Implications显示文摘摘要:在湖南省的 Xianghualing Sn-polymetallic orefield,南部的中国,是大尺寸的听 orefield。尽管众多的研究在这 orefield 上被承担了,它的开始,矿化作用年龄,和构造背景仍然是争论的,主要因为听矿化作用上的可靠 geochronological 数据的缺乏。40Ar/39 Ar 标明日期方法的逐步的加热首先在这 orefield 从不同存款在白云母上被采用。从 Xianghualing Sn-polymetallic 存款的白云母样品定义 154.4 | YUAN Shunda PENG Jiantang SHEN Nengping HU Ruizhong DAI Tongmo | 2007 | Acta Geologica Sinica(English Edition)2007，81，2： | 76 |
| 2 | Re–Os dating of molybdenite and in-situ Pb isotopes of sulfides from the Lamo Zn–Cu deposit in the Dachang tin-polymetallic ore field, Guangxi, China显示文摘The Dachang tin-polymetallic district, Guangxi,China, is one of the largest tin ore fields in the world. Both cassiterite-sulfide and Zn–Cu skarn mineralization are hosted in the Mid-Upper Devonian carbonate-rich sediments adjacent to the underlying Cretaceous Longxianggai granite(91–97 Ma). The Lamo Zn–Cu deposit is a typical skarn deposit in the district and occurs at the contact zone between the Upper Devonian limestone and the granite.The ore minerals mainly consist of sphalerite, arsenopyrite,pyrrhotite, galena, chalcopyrite, and minor molybdenite.However, the age of mineralization and source of the metals are not well constrained. In this study, we use the molybdenite Re–Os dating method and in-situ Pb isotopes of sulfides from the Lamo deposit for the first time in order to directly determine the age of mineralization and the tracing source of metals. Six molybdenite samples yielded a more accurate Re–Os isochron age of 90.0 ± 1.1 Ma(MSWD = 0.72), which is much younger than the reported garnet Sm–Nd isochron age of 95 ± 11 Ma and quartz fluid inclusions Rb–Sr isochron age of 99 ± 6 Ma. This age is also interpreted as the age of Zn–Cu skarn mineralization in the Dachang district. Further, in this study we found that in-situ Pb isotopes of sulfides from the Lamo deposit and feldspars in the district's biotite granite and granitic porphyry dikes have a narrow range and an overlap of Pb isotopic compositions(^(206) Pb/^(204) Pb =18.417–18.594,^(207) Pb/^(204) Pb = 15.641–15.746, and^(208) Pb/^(204) Pb = 38.791–39.073), suggesting that the metals were mainly sourced from Cretaceous granitic magma. | Hai Zhao Wenchao Su Peng Xie Nengping Shen Jiali Cai Ming Luo Jie Li Zhian Bao | 2018 | Acta Geochimica2018，37，3： | 11 |
| 3 | Lead isotope geochemical characteristics of Pb-Zn-Cu deposits on the southwestern margin of Tarim,and their significance显示文摘The polymetallic(Pb,Zn,Cu,etc) ore belt on the southwestern margin of Tarim is one of the major regions with the greatest prospecting potential in Xinjiang.Reported in this paper are the lead isotope data for 66 sulfide samples(including 50 galena samples,15 chalcopyrite samples and 1 pyrite sample) collected from such representative deposits as Tamu,Tiekelike,Kalangu,Abalieke,etc.in this ore belt.The Pb isotopic ratios of 206 Pb/204 Pb,207 Pb/204 Pb and 208 Pb/204 Pb in the galena samples range from 17.931 to 18.176,15.609 to 15.818 and 38.197 to 38.944,with the average values of 18.017,15.684 and 38.462,respectively.Those in the chalcopyrite samples range from 17.926 to 18.144,15.598 to 15.628 and 38.171 to 38.583,with the average values of 18.020,15.606 and 38.262,respectively.The pyrite sample has the Pb isotopic ratios of 206 Pb/204 Pb,207 Pb/204 Pb and 208 Pb/204 Pb to be 17.980,15.604 and 38.145,respectively.In combination with the previous Pb isotope data for sulfides,it is found that there is only a slight variation in the Pb isotopic composition of galena,chalcopyrite,sphalerite and pyrite in the ore belt.However,there is some difference in Pb isotopic characteristics between galena and chalcopyrite,especially the Pb isotopic composition of galena shows an obvious linear correlation with some other relevant parameters(e.g.β and γ).The comprehensive analysis suggested that lead in galena(maybe including sphalerite and pyrite) was derived principally from wall rocks and underlying basement,and that in chalcopyrite only originated from the basement.The single-stage model ages of these sulfides couldn't indicate the time limit of metallogenesis(Pb,Zn,Cu,etc.),and the positive linear correlations for the Pb isotopic composition of galena are of no single-stage and two-stage Pb-Pb isochron significance.Furthermore,there are significant differences in Pb isotopic composition characteristics between the genetic type of deposits in this polymetallic ore belt and the Mississippi Valley type(MVT).In addition,the authors also pointed out that there is a phenomenon of differentiation(not paragenesis) for lead and copper elements during the process of metallogenesis in this ore belt. | SHEN Nengping ZHANG Zhengwei YOU Fuhua PENG Jiantang ZHU Xiaoqing XIAO Jiafei | 2012 | Chinese Journal Of Geochemistry2012，31，4： | 3 |
| 4 | Precise molybdenite Re–Os and mica Ar–Ar dating of the Mesozoic Yaogangxian tungsten deposit, central Nanling district, South China显示文摘 | Jiantang Peng Mei-Fu Zhou Ruizhong Hu Nengping Shen Shunda Yuan Xianwu Bi Andao Du Wenjun Qu | 2006 | Mineralium Deposita2006，，7： | 1 |
| 5 | Precise molybdenite Re–Os and mica Ar–Ar dating of the Mesozoic Yaogangxian tungsten deposit, central Nanling district, South China显示文摘 | Jiantang Peng Mei-Fu Zhou Ruizhong Hu Nengping Shen Shunda Yuan Xianwu Bi Andao Du Wenjun Qu | 2006 | Mineralium Deposita2006，，7： | 1 |
| 6 | Precise molybdenite Re-Os and mica Ar-Ar dating of the Mesozoic Yaogangxian tungsten deposit,central Nanling district,South China显示文摘 | Peng Jiantang Zhou Meifu Hu Ruizhong Shen Nengping Yuan Shunda Bi Xianwu Du Andao Qu Wenjun | 2006 | Miner Deposita2006，41，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员