Shanxi Lingqiu County branch of the family silver to lead and zinc geochemical characteristics and genesis of

Title: Shanxi Lingqiu County branch of the family silver to lead and zinc geochemical characteristics and genesis ofAuthor: Joseph Tan XianDegree-granting units: Central South UniversityKeywords: branch home to lead-zinc silver;; ore types;; mineralization age;; into mineral sources;; genesisSummary:

Based on the national crisis prospecting mining resources, project management office to succeed in 2008 approved the project of "Shanxi Lingqiu County branch of the family to the law and lead-zinc silver mineralization prediction" special research projects, the paper support at home to carry out a lead-zinc silver deposit geology macroscopic, microscopic characteristics, geochemical (REE, trace elements and stable isotopes) characteristics of research on Magnetic lifter family support to hydrothermal fracture filling ore type and hidden breccia-type ore body has been studied and compared, minerals of the mine into the sources and causes, in order to further understanding of epithermal polymetallic mineralization law and the establishment of metallogenic model provides a useful example.

And understanding of the major achievements are as follows:

(1) support home ground, Zn, Ag mine conducted a field investigation, the middle and through different geological phenomena revealed by drilling, carried out the macro feature more deposits, divided into hydrothermal fracture filling type, two hidden breccia type major ore types, comparison of two types of ore body shape and spatial distribution.

(2) the microscopic characteristics of the two types of ore bodies, geochemical characteristics were compared by analysis of microscopic petrography and X-ray diffraction analysis, we found two types of ore in the ore mineral composition and structure of construction so there are obvious differences, further confirmed the correct classification between the two.

(3) found that there are different stages of mine mineralization. Using ICP-MS, electron probe and scanning electron microscopy spectrometer for different stages of in situ sulfide content analysis of major elements, both confirmed from the microscopic point of view the difference between the two, is also mine the first time the multi-stage understanding of http://www.999magnet.com/products/131-magnetic-lifter mineralization for the expansion of mining resources to provide a valid theoretical basis.

(4) tentative breccia cements using implicit in the single-zircon U-Pb dating was carried out to determine its mineralization age (129-144Ma).

(5) of the ore rock geochemical studies carried out, quartz porphyry of major elements, REE and trace element analysis showed that the main characteristics of S-type granites are similar; Pb isotope, δ18O, δD, and Lu-Hf isotope The results show that the main area magmatic source for the lower crust and mantle materials mixed with, for the mineralization model was provided.Degree Year: 2010