Dissertation > Excellent graduate degree dissertation topics show

Geodynamic Evolution of Qilian Orogenic Belt and Metallogenesis of Endogenous Metals

Author: LiShiJin
Tutor: SunFengYue
School: Jilin University
Course: Mineralogy,petrology, Mineral Deposit Geology
Keywords: Qilian orogenic Dynamical evolution Endogenous metal ores Mineralization Metallogenic regularity
CLC: P618.2
Type: PhD thesis
Year: 2011
Downloads: 366
Quote: 2
Read: Download Dissertation

Abstract


Qin Qi Kun Qilian orogenic belt located in the middle of the Central Orogenic System, was - the NW-trending mountain chains constitute a large part of the northern edge of the Tibetan Plateau. Due to its unique geological and tectonic evolution of long geological history, making it a typical and complex composite orogenic belt and formed in various geological evolution times and in different tectonic environments combination produced a series of deposits, become an important metallogenic belt in western China, is one of Northwest nonferrous metals, ferrous metals and precious metals is an important producer. Thesis orogenic theory as a guide, the region in the past through a comprehensive analysis of geological data and research to further explore and redefine the Qilian orogenic belt of the geological history and evolution of geodynamic processes, the establishment of Geodynamics evolution model; and modern testing technology to support the application of modern metallogenic theory, through the region of typical deposits of different genetic types of surveys and studies, the system summarizes the Qilian orogenic belt in different geological periods, different dynamics context mineralization characteristics and formation of deposits in series, thus clarifies endogenous mineralization characteristics of metal ores and temporal distribution. Studies have shown that once existed three ancient Qilian orogenic Ocean (North Qilian Ocean, pulled chicken party Nan Shan a Shan Yang, North Qaidam Ocean), and in addition to the north and south Qaidam and outside Alashan two continental blocks (in Qilian continental block, South Qilian land mass). Three oceans over the past many researchers determined illustrate the alleged evidence that there is a deviation continental rift. Meanwhile, in the past that the emergence of the ocean Neoproterozoic time, but through the middle Proterozoic volcanic rocks Zhulongguan studies show that it is Mesoproterozoic oceanic basalt plateau part of activities under the control of the plume was formed in mature oceanic plate inside, so the study area already exist in mature Mesoproterozoic ocean, so the ocean formation time should be earlier than Mesoproterozoic specific time needs to be further discussed. Through the North Qaidam Tanjianshan gold research, first proposed and identified Tanjianshan metamorphic core complexes and their role in the control of gold, not previously considered overthrust structure ore. By LA-ICP-MS zircon U-Pb method to determine the composition of metamorphic core complex plagioclase porphyry age of 394.4 ± 6.0Ma, Crescent West is a product of the early continental collision; has gold mineralization in acid dykes at the age of 344.9 ± 2.2Ma, as Crescent West stretch late stage of the product, which is metamorphic core complex emplacement uplift and ultimately the formation of gold mineralization of the time. They represent the same magmatic activity at different stages of continuous evolution and mineralization of the product. Systematically summed up the region under different extensional environment submarine hydrothermal mineralization characteristics of the jet and the formation of deposit types, exhalative deposits made unique by the water jet composed of rocks and black shales of the \rocks, \A detailed study of the region and of intrusive magmatic hydrothermal mineralization activity types and mineralization characteristics that in acidic magma evolution and emplacement of the different stages and different parts of the formation of different types of mineralization. Deposit on the part of the fluid inclusions and mineralization age were studied. The results show that Montenegro tungsten deposit is a typical skarn deposits, which forms underwent two four phases: Phase skarn fluid temperature at 360-480 ℃, mineralization depth 4.8-5.6 km; quartz - sulphide mineralization temperature phase focused on 200-3200C, mineralization depth of 2-2.4km, reflecting the area occurred from early to late strong uplift; LA-ICP-MS zircon U-Pb age of 422 Ma for the Late Ordovician. The dual-port Hill lead-zinc, copper Lvliangshan formation temperature of 120-260 ℃, mineralization depth of 1.4-2.86km, genus epithermal vein-type deposits. Determined once pulled chicken Mountains mud ditch gold deposit skarn deposits rather than their predecessors called orogenic gold deposit, also pointed out in the calcium deposits in volcanic areas in search of similar meaning. In addition, the paper a detailed study of the region of orogenic gold mineralization and type of the region to establish a continuous orogenic gold mineralization model. Fluid inclusion study results show that the region mostly shallow subcategories orogenic gold deposit. Thesis under the North Qaidam newly discovered copper-nickel mine pivotal beam mineralization, with similar deposits in the region and adjacent areas of comparative studies, that the region has a type deposits formed from molten magma in good condition, exploration potential. Papers on research and systematic summary of metallogenic regularity based on the results of this study and regional prospecting new progress from prospecting, and other aspects of the main minerals prospecting some new ideas and suggestions.

Related Dissertations

  1. Bio-inspired Mineralization Process of TiO2 and CaCO3 in Agarose Gel Medium,O611.3
  2. Preparation, Modification and Characterization of PHBV/HA Composite Materials for Bone Tissue Repair,R318.08
  3. Synthesis of Amphiphilic Block Copolymer, Self-assembly and Mineralization of Hydroxyapatite,O631.3
  4. The Research of Electro-Catalytic Oxidation for Nitrophenol in Aqueous Solution on Modified SnO2 Anodes,X703.1
  5. Limewater Pretreatment in the Re-mineralization Process,TU991.2
  6. Mineralization Process of Organic Phosphorus and Influential Factors in Urban Lake Sediment,X524
  7. The Preparation and Characterization of Bioactive Coating on Titanium,TG174.4
  8. Study on Green Manure Application on Tobacco Fields in Shandong Province,S55
  9. Exogenous metal ions on primary cultured osteoblast proliferation , differentiation and mineralization of,R329
  10. Effects of Strontium-containing Hydroxyapatite on Proliferation, Differentiation and Mineralization of Osteoblasts in Vitro,R318.08
  11. Study on the Characteristics of Carbon and Nitrogen Mineralization of Maize Stalk in Lime Concretion Black Soil,S158
  12. Xinjiang copper- nickel deposit metallogenic regularity and metallogenic prediction,P618.41
  13. Lead-Zinc Deposits in Northwest Guizhou regularity and Prospecting,P618.4
  14. Biochar effects on soil microbial ecological characteristics,S154.3
  15. Influence of Biochar Amendments on Decomposition of Soil Organic Carbon and Morphology of Heavy Metal in Red Paddy Soil,S153.6
  16. The Preliminary Study of the Genesis and Tectonic Significance of Early Paleozoic Granitoids in the Eastern Section of the North Qilian,P588.121
  17. Study on the Course of Soil Nitrogen Mineralization and Influence Factors in Larix Gmelinii Forests,S714
  18. Studies on Preparation of Hydroxyapatite and Property of Hydroxyapatite/Chitosan Composite,R318.08
  19. Template regulation of the water thermal Preparation of calcium carbonate biomimetic materials,TB39
  20. Dynamic Simulations of Orbital Distribution of SKBOs,P185
  21. Study on the Mechanisms of Simulative Mineralization of Borosilicate Glasses,R318.08

CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Metal deposit ( Zonglun,)
© 2012 www.DissertationTopic.Net  Mobile