【摘 要】
：
Massive sulfide ore from the Jinchuan Ni-Cu-PGE deposit was dated by Re-Os technique using Carius Tube digestion, Os distillation, Re extraction by acetone and
【机 构】
：
National Research Center of Geoanalysis,Laboratory for Earth Material Cycling,Institute of Mineral R
论文部分内容阅读
Massive sulfide ore from the Jinchuan Ni-Cu-PGE deposit was dated by Re-Os technique using Carius Tube digestion, Os distillation, Re extraction by acetone and ICP-MS measurement. An isochron giving an age of 833 ± 35 Ma, initial 187Os/188Os ratio of 0.279 ± 0.018 (MSWD = 1.7) and γOs = 130 ± 15 is obtained. The Re-Os age obtained agrees, within analytical uncertainties, with previous SHRIMP zircon U-Pb age of 827 ± 8 Ma (n=5, MSWD = 4.3). The result suggests that the deposit was formed at Neoproterozoic and that the formation of the Jinchuan Ni-Cu-PGE sulfide deposit may be closely related to the plume activity, which were attributed to the breakup of the Rodinia supercontinent. The high γOs of the massive ores suggests that crustal material was involved in the formation of the Jinchuan deposit, however, the quantity of the added crustal material is less than 10%.
其他文献
从英国法的早期开始对于买受人的保护是非常薄弱的,买者自慎的观念从一般大众的经验上升为了法律规则,所以英国买卖法中物之瑕疵担保责任的观念从最开始的时候就表现出了与大
Guizhou Province, located in the southwestern China, is an important mercury (Hg) production center. High levels of Hg were found in local environmental and bio
Zircon U-Pb dating indicates that the fuchsite quartzite in eastern Hebei Province was derived from weathering and erosion of the 3.6-3.8 Ga granitic rocks. In-
In case of considering the fact that the tropical ocean thermocline or the lower atmosphere height field has the meridional variation, the topographic Rossby wa
Cycladophora davisiana (Radiolarian) contents are counted in two cores of the Bering Sea and correlated well with the oxygen isotopic records of ice in the deep
Based on MC-ICP-MS U-series dating and stable O-isotope analysis results, a 4-5 years resolution monsoon record over the past 1000 years has been estab- lished
This paper proposes a new method for geographical simulation by applying data mining techniques to cellular automata. CA has strong capabilities in simulating c
Mucopolysaccharidosis type II is of high genetic heterogeneity. PCR-DNA sequencing was used to study the mutation hot spots in the IDS gene of a Chinese MPS II
LA-ICP-MS zircon U-Pb dating indicates that the Bailiping granitic pluton was emplaced during Late Paleozoic to Early Cretaceous (285―116 Ma) by four distinct
The geological condition of coalfield is much complex in China. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply