| The article researches the Carlin-type gold deposit in zhen’an country. The carlin typegold deposit mainly includes Jinlongshan gold deposit and Donggou gold deposit, and thelatter deposit lies in Jinlongshan metallogenic belt.On the basis of completely summing theprevious research results and field geological investigation, collecting large geologicalmassages and fossil minerals and rocks, the deposits are studying using some theories andmethods, which including modern petrology, mineralogy, ore mineralogy, geochemistry,remote-sensing geology and metallogenic prognosis theory: With the study of the regionalmetallogenic background and evolution history of geological tectonic in this area, and thegeological characters and metallogenic characters of Jinlongshan deposit and Donggoudeposit, the main ore control factors and metallogenic conditions of the gold deposits areanalyzed. And the discussion of genesis are made using the geochemistry characters, whichincluding texture, structures, stable isotope, trace elements and rare earth elements of theminerals; and inclusion temperature. And the ore genesis is related to the favorable strata,tectonic and metallogenic hydrothermal. The Northeast20-60km mining area has a largenumber of Yanshan period granite was exposed,206Pb/238U weighted mean age of141.7±1.4Ma， and the distribution of porphyry copper deposits, gold deposits related to.Geophysical characteristics show that the deep mine has concealed rock mass, may beintrusive rocks of Yanshan period, providing ore-forming materials and energy for theformation of the gold deposit.At last, through the metallogenic prediction research, the exploration targets and keyregion are pointed out. |
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