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Wang L.-Q.,Chinese Academy of Geological Sciences | Gu X.-X.,China University of Geosciences | Tang J.-X.,Chinese Academy of Geological Sciences | Wang H.,Chinese Academy of Geological Sciences | And 3 more authors.
Journal of Chengdu University of Technology (Science and Technology Edition) | Year: 2011

The paper studies the source and characteristics of the ore-forming fluids in the Mengya'a Pb-Zn deposit of Tibet and identifies the genetic type of deposit by studying the typical deposit of this area. It analyzes the altered limestone in the surrounding area, the carbon and oxygen isotopes of hydrothermal calcite and the hydrogen and oxygen isotopes of quartz formed in different mineralization periods, studies the fluid inclusions petrographically, and measures their temperatures and salinity. The resuct shows that in the early post-mineralization stage, the ore-forming fluids were was mainly in the form of magmatic water, while in the later stage, they were mixed with plentiful meteoric water. In the mineralization period, ore-forming fluids were generally characterized by medium-high temperatures and intermediate-low salinity and there was an apparent temperature-dropping trend from the early to the late ore-forming stage. The formation of the deposit is closely related to magmatism and the deposit is a zinc-lead one under the skarn type.

Wang L.-Q.,Chinese Academy of Geological Sciences | Cheng W.-B.,China University of Geosciences | Luo M.-C.,China University of Geosciences | Xiang H.-Y.,Sichuan Institute of Nuclear Geology
Geology in China | Year: 2012

No research results of RRE geochemistry have so far been reported since the discovery of the Mengya'a Pb-Zn deposit. In this paper, the REE compositions of metallic sulfides and hydrothermal quartz from this ore deposit were determined by ICP-MS. Studies show that pyrrhotite, chalcopyrite, sphalerite and galena are somewhat different in EE amount, but they all have the distribution patterns of righdy- oblique LREE enrichment type. According to the Eu anomaly, these metallic sulfides can be divided into 3 groups, and the Eu anomalies are mainly caused by the transformation of physical and chemical environment in the ore -forming process and the mass crystallization of calcite. There also are differences of REE amount in 4 quartz samples due to their difference in crystallization time and temperature, and their distribution patterns are also of the rightlyoblique LREE enrichment type. Meanwhile, the quartzes formed at different stages have their strong positive or negative Eu anomalies separately, which is attributed to the addition of later meteoric water and the formation of lots of calcites.

Wang M.,Wuhan University | Zheng Y.,Wuhan University | Xu R.,Wuhan University | Liu Y.,Sichuan Institute of Nuclear Geology | And 3 more authors.
Chinese Journal of Geochemistry | Year: 2014

The Shewushan gold deposit is located 16 km southwest of Jiayu County, Hubei Province, eastern China, which is the largest lateritic gold deposit in Asia, consisting of a series of mineralized faults containing gold grades of 1.0-19.5 g/t set within a larger, lower-grade (0.2-1.0 g/t) zone. According to the fluid inclusions study, the homogenization temperature ranges from 70-350°C, and concentrates between 140-220°C. The laser Rama results show that the CO2 and CH4 exist in mineralized fluid. In addition, the major and trace element and REE geochemical data show that the genesis of the siliceous rocks is hydrothermal genesis, formed by mineralized fluid bearing SiO2 transmitted along faults to the surface, and replace the carbonate rocks to begin deposition. Primary gold mineralization is attributed to hydrothermal activity that followed the main period of tectonic deformation of the Indosinian orogeny, which caused the regional detachment regime in southeast Hubei. The reversed fold and the fault system formed the fluid migration channel in the Shewushan area. EPMA results show that Au exists in arsenopyrite (850×10-6-1550×10-6 Au) and pyrite (470×10-6-1340×10-6 Au). Therefore, based on the above results and combined with the field observation, we suggest that the genesis of primary orebody in Shewushan deposit is carlin type, while not weathered residual type. © 2014 Science Press, Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg.

Zhong H.M.,Sichuan Institute of Nuclear Geology | Yuan H.,Sichuan Institute of Nuclear Geology | Zeng G.Q.,Chengdu University of Technology
Electronics, Information Technology and Intellectualization - International Conference on Electronics, InformationTechnology and Intellectualization, EITI 2014 | Year: 2015

Nuclear accident emergency is different from the normal order and the normal work procedures. Its main task is to control, reduce and eliminate nuclear accidents that may cause damage and destruction, and to ensure public safety. Once a radiation accident happens, rescue personnel should carry a nuclear emergency monitoring terminal, immediately rush to the scene in order to conduct an investigation, transmit the collected and processed data of the scene to the monitoring command centre, keep abreast of the situation so that the centre is able to respond quickly to the emergency situation, and reduce losses to a minimum. This paper describes a remote control machinery tracked vehicle measurement and control system which uses wireless communication. The system, operated via a remote monitoring and control information system, without staff being present at the scene, would play a significant role in case of a nuclear accident emergency. © 2015 Taylor & Francis Group, London.

Li Q.-Y.,Chengdu University of Technology | Cai H.-R.,Sichuan Institute of Nuclear Geology | Chen Y.,Sichuan Institute of Nuclear Geology
Geology in China | Year: 2010

Based on the principle of geothermy, this paper studied the relationship between the geothermal field and the deep uranium ore deposit in such aspects as the enrichment of radioactive elements, the numerical simulation of the heat production of uranium ore deposit and the uranium information identification from geothermal data. Some experiments were conducted in Zoige area by using the thermal infrared remote-sensing method. The results show that the message of deep uranium ore deposit is closely related to the geothermal distribution, and the geothermal data can be used in search for deep uranium ore deposits.

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