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Li W.-G.,Sinomine Resource Exploration Co. | Wang T.-G.,Nanjing Center | Yao Z.-Y.,Nanjing Center | Li H.-J.,Nanjing Center | Zhu Y.-P.,Nanjing Center
Geological Bulletin of China

Epithermal gold deposits related to alkaline rocks possess a significant place in global metallogenic belts, especially in the Circum-Pacific metallogenic belt. Among them, the Porgera gold deposit located in the New Guinea orogenic belt is a typical deposit. The mineralization of the deposit is associated with alkaline Porgera intrusive complex and mostly occurs in the contact zone between the rock mass and the strata of Cretaceous Chim Formation. The ore-forming process can be divided into two stages, and the mineralization styles includes vein mineralization and breccia mineralization. The metallogenic materials and fluids of the deposit exhibit the characteristics of magma resources. The age of mineralization-related Porgera complex intrusion is 5.99Ma, which is consistent with the metallogenic epoch, and the magma of the intrusion originated from the metasomatic-enrichment type upper mantle. This kind of alkaline magma played an important role in gold concentration. The ore-controlling factors and indicators for the exploration of the deposits are summarized in this paper, which can provide guidance in search of similar deposits for China's mining enterprises. Source

Yao Z.-Y.,Nanjing Center | Wang T.-G.,Nanjing Center | Zhang J.-W.,Sinomine Resource Exploration Co. | Chen G.,Nanjing Center | Li H.-J.,Nanjing Center
Geological Bulletin of China

Based on a preliminary investigation of the metallogenic geological background of superior mineral resources, features of metallogenic zones (belts), deposit types and resources potentials in Oceania, the authors analyzed the present situation of the going aboard strategy of the Chinese geological prospecting enterprises and the investment environment of Australia, Papua New Guinea and some other countries. Australia and Papua New Guinea possess huge reserves of Fe, Mn, Cu, Al and Ni as well as ores with strategic significance such as Au, U and rare earth, and these mineral resources are complementary to China's domestic demand for mineral resources. Thus, these mineral resources in Australia and Papua New Guinea seem to be the ideal deposit mining projects for the Chinese mining companies wishing to look for developing chances aboard. At last, some suggestions for either long-term or short-term going abroad strategy are put forward based on previous work experience gained by the authors. Source

Chen G.,Nanjing Center | Yao Z.-Y.,Nanjing Center | Wang T.-G.,Nanjing Center | Gao W.-H.,Nanjing Center | And 2 more authors.
Geological Bulletin of China

Based on the database of the standards, construction process, data quality control measures and methods and processes, the authors constructed the databases of Fe, Mn, Cu, Al, Au, Ni, U and REE mineral resources for Oceanian region. Through a comprehensive analysis of the multi-source data information of geology and mineral resources, the regional metallogenic regularity was summarized, and the basic data were provided for mineral resources prediction. The database management system formed in this way makes the data management and inquiry more convenient, the expression more intuitive, and the analysis and summarization more effective. Source

Xu M.,Nanjing Center | Li H.-J.,Nanjing Center | Bai J.,Sinomine Resource Exploration Co. | Zhao X.-D.,Nanjing Center | Guo W.-M.,Nanjing Center
Geological Bulletin of China

The Fiji platform has a thick, youthful crust of ensimatic origin,and its metallization is related to tectonic evolution. Stratigraphy within the Fiji Islands indicates a history restricted to the Cenozoic, with volcanic rocks, principally submarine fragmental types with related sediments, dominating the succession. There are also carbonate sediments and plutonic rocks of gabbroic to tonalitic composition which were intruded during an important middle to late Miocene tectonic event. Mineral deposits in Fiji Islands include various types of massive sulfide deposits, porphyry Cu-Au deposits, skarn deposits, epithermal Au deposits, sedimentary manganese deposits, residual deposits and placer deposits. Four distinct stages in the development of Fiji Islands have been identified. These stages are related to changes in tectonic development and are reflected in the spatial land temporal distribution of various styles of mineralization presently found across Fiji Islands. Source

Li Z.-J.,Beijing University of Technology | Wang Y.,Beijing University of Technology | Liu B.-L.,Beijing University of Technology | Yang C.,Beijing University of Technology | Yang C.,Sinomine Resource Exploration Co.
Advances in Materials Science and Engineering

A glass-like casing was developed to mend the instable borehole due to its great similarities in compositions and structure. In order to boost the casing's mechanical properties and lower its cost, different wt% additions of aluminum and quartz sand are added into the composition. Based on the outcomes of differential scanning calorimeter (DSC), it is suggested to be sintered at the temperature of 700°C. The results of X-ray diffraction (XRD) show that aluminum and SiOare its main crystalline phases. Its compression strength and the tensile strength range 5-14 Mpa and 0.5-4.5 Mpa, respectively, with the relative densities of between 1.00 g/cm3 and 1.19 g/cm3. In the end, a glass-based formula with 30 wt% aluminum and 40 wt% quartz sand is developed and experimentally applied. © 2015 Zhi-jun Li et al. Source

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