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The Grade-Tonnage Model for China's molybdenum deposits

Acta Geologica Sinica(English Edition) 2012年第3期86卷 680-690页

作者： WANG Zhong XIAO Keyan SONG Chuanzhong School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China Institute of Mineral Resource Chinese Academy of Geological SciencesBeijing 100037China

The authors have studied the statistical characteristics of China＇s molybdenum deposits to establish the grade-tonnage model based on the data updated to the end of 2010. The results showed that each type of China＇s molybdenum deposits complied with Lasky＇s law approximately and the characteristics of grade-tonnage model obey the lognormal distribution. However, there are poor correlations between grade and tonnage respectively. Ultimately, we aimed to fit the grade-tonnage model through the known distribution function, draw the cumulative probability curves, and evaluated undiscovered mineral resources of China＇s molybdenum deposits by means of Monte Carlo simulation integrated in MRAS.

关键词： molybdenum deposits grade-tonnage model probability statistics MRAS Monte Carlo simulation

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A Preliminary Review of Metallogenic Regularity of molybdenum deposits in China

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 972-1001页

作者： HUANG Fan LIU Xinxing WANG Denghong WANG Chenghui MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological Sciences School of Earth Sciences and Resources China University of Geosciences Beijing

molybdenum is one of the dominant minerals in China because of its rich *** recent years,outstanding breakthroughs have been made in molybdenum prospecting in China,and the distribution of molybdenum deposits in China is found to have a ＂planar pattern＂.In general,the molybdenum deposits are concentrated in eastern China,including the largest molybdenum reserves of Henan *** terms of the scale of molybdenum deposits,the identified resources of the superlarge deposits are the most important,which account for about 53% of the whole country,and those of the large deposits account for about 30%,those of the medium-sized deposits account for about 14%,those of the small-sized deposits,mine spots and mineralization account for about 3%.The molybdenum deposits are mainly classified as porphyry type,skarn type,hydrothermal（vein） type and sedimentary（metamorphic） type in genesis,and the identified resources of these types account for 85.75%,8.83%,2.79%and 2.63% of the total resources *** on the statistics of precise chronology data of molybdenites Re-Os,Mo-mineralization can be divided into 6 periods in Chinese geological history,which are Precambrian（〉800 Ma）,Cambrian-Silurian（540-415 Ma,Caledonian）,Devonian-Permian（400-290 Ma,Hecynian）,Triassic（260-200 Ma,Indosinian）,Jurassic-Cretaceous（195-70 Ma,Yanshanian） and Paleogene-Neogene（65-10 Ma,Himalayan）.Mo mineralization during the Yanshanian period is the strongest one,in which about 76.69% of the Chinese total identified resources was *** second is the Himalayan *** to spatial-temporal distribution characteristics of molybdenum deposits,the metallogenic regularity of molybdenum deposits was preliminarily summarized,and 41 level-Ⅲ molybdenum-forming belts,13 level-Ⅱ molybdenum-forming provinces and 4 level-Ⅰ molybdenum-forming domains were ascertained in the mainland of *** are 39 metallogenic series of and 60 sub-series of molybdenum deposits with molybdenum as the d

关键词： molybdenum deposits deposits type molybdenum-forming belt regional metaUogeny,tectonic evolution suggestion for prospecting

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Tectonic implications of Re-Os dating of molybdenum deposits in the Tianshan–Xingmeng Orogenic Belt,Central Asia

Tectonic implications of Re-Os dating of molybdenum deposits...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Chunming Han Wenjiao Xiao Guochun Zhao Benxun Su Songjian Ao Jien Zhang Zhiyong Zhang Bo Wan Zhongmei wang Key laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Department of Earth Sciences The University of Hong Kong

The Tianshan–Xingmeng molybdenum belt is part of a larger E–W-trending metallogenic belt in northern *** of these molybdenum deposits occur as porphyry or porphyry-skarn type,but there are also some vein-type *** systematic Re-Os dating of molybdenite from four deposits and comparisons with two previously dated deposits,we conclude that molybdenum mineralization in the Tianshan–Xingmeng Orogenic Belt resulted from hydrothermal activity linked to the emplacement of granitoid *** pulses of granitoid magmatism and Mo mineralization have been recognized in this study,corresponding to tectonic events in the Tianshan–Xingmeng Orogenic *** identify five distinct stages of Mo mineralization events in the Tianshan–Xingmeng Orogenic Belt:320–250 Ma,250–200 Ma,190–155Ma,155–140 Ma,and 140–120 *** Palaeozoic(320–250 Ma)Mo mineralization was closely related to closure of the Palaeo-Asian Ocean and collision between the Siberia and Tarim ***(250–200 Ma)Mo mineralization occurred in a post-collisional tectonic *** Early–Middle Jurassic(190–155 Ma)Mo mineralization was related to subduction of the Palaeo-Pacific Ocean on the eastern Asian continental margin,whereas in the Erguna block,the Mo mineralization events were associated with the subduction of the Mongol–Okhotsk *** 155 to 120 Ma,large-scale continental extension occurred in the Tianshan–Xingmeng Orogenic Belt and surrounding ***,the Late Jurassic(150–140 Ma)Mo mineralization events in these areas evolved in a post-orogenic extensional environment of the Mongol–Okhotsk Ocean subduction *** Early Cretaceous(140–120 Ma)Mo mineralization occurred under the combined effects of the closure of the Mongol–Okhotsk Ocean and subduction of the Palaeo-Pacific Ocean.

关键词： Re-Os dating molybdenum deposits tectonic setting Tianshan–Xingmeng Orogenic Belt Central Asia

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