| Manzhouli-Xin Barag Youqi polymetallic metallogenic belt located in Inner Mongolia is animportant non-ferrous and noble metals metallogenic belt within Northeast region and throughoutChina. The belt is the region with great ore prospecting potential in the provinces located inDaxinganling. Due to the low level research on basic geology in this area, there has been a problemwith tectonic evolution, Mesozoic volcanic division and genetic type of mineral deposits, which hasa strong impact on the work of mineral exploration and prospecting in this area. In this paper, thestudy area was chosen to study the regional metallogenic background and typical deposit, summarizethe regional metallogenic regularity, establish regional metallogenic models and guide the area ofnon-ferrous and precious metal deposits prospecting work.Mesozoic volcanic series of Xin Barag Youqi in Manzhouli Area have been systematicallystudied in this paper,stratigraphic sequences are reclassified and described. The stratigraphicclassification of Mesozoic volcanic series among1:200,000regional geological reports, geologicalnotes and data of Inner Mongolia, lithostratigraphy of the Inner Mongolia Antonomous Region are inconfusion. The geologic time and Formations of Mesozoic volcanic series in various reports andarticles are also inconsistent. Based on the data in zircon dating of volcanic,1:200,000regionalgeological reports, geological notes and data of Inner Mongolia, lithostratigraphy of the InnerMongolia Antonomous Region(1996),and with the stratigraphic correlation of the Great Xing'anMountain Region in Heilongjiang Province, the author redivided the Mesozoic volcanic series ofresearch area. Mesozoic volcanic series can be divided into J2tm, J3mk, J3mn, from bottom to up.Cretaceous can be divided into K1by, K1m and K1d. Based on the data of intrusive rock petrology,petrochemistry, LA-ICP-MS, zirconU-Pb, granite of Permian, late Jurassic and early Cretaceous inresearch area are studied systematically and synthetically, the age of occurrence and environment ofthe Mesozoic volcanic series have been discussed. The result of research is as follows: granite in Permian and the granit in late Jurassic and early Cretaceous all belong in the cal-alkaline acid granite,they are from island arc or epicontinental active belt, whose formation is related to northwardsubduction of the lithospheric plate, with a property of the volcanic-magmatic island arc. Granite inearly Cretaceous is in kind of acid hypabyssal subvolcanic rocks especially. It has great importance tothe formation of some hypabyssal epithermal deposit such as gold, silver, copper, lead and zinc in thisarea.There always been difference opinions on Ergun regional tectonic evolution. Formation,development and evolution of the region's tectonic were determined in this paper with the regionaldeposition construction, magma construction, volcanic construction and structural types, combiningwith several major stages of the crustal movement in China. This study proposed that the study areahad experienced three large tectonic evolution stages including Neoarchean-the early block ofMesoproterozoic crystalline basement formation, Neoproterozoic-Early Triassic Paleoasianarc-basin system, the coast of the Pacific active continental margin since the Middle Triassic stageand nine sub-structural tectonic developing stages..Five typical deposits were selected for this study. In this study, detailed field survey wasconducted. Mine and geological features, fluid inclusions, stable isotope were studied. Ore-formingmechanism was analyzed and a deposit metallogenic model was established. Jiawula-ChaganbulagenAg-Pb-Zn deposit has been considered to be hydrothermal vein type in the past. But in these twomining areas a large number of adularization were found. Adularization is a typical sign oflow-temperature epithermal type deposit. It is proved that Jiawula-Chaganbulagen Ag-Pb-Zndeposit is low-temperature epithermal type, not hydrothermal vein type with the above strongevidence.Based on the analysis about the deposit formation and temporal relationships, substancesymbiosis, zoning and deposit type combination, this thesis systematically summarizes the regionalmetallogenic regularity. The District of non-ferrous metals mineralization age is late Yanshan, fromthe late Jurassic to early Cretaceous, porphyry mineralization age from Late Jurassic to earlyCretaceous, epithermal mineralization age mainly during the early cretaceous. In view of thegeological feature, tectonic pattern and tectonic evolution of the comprehensive analysis, the area isdivided into3sub-metallogenic belt, respectively, which are Hani ditch copper molybdenumpolymetal metallogenic belt, and wood Hal silver lead zinc polymetallic sub metallogenic belt andKerr Lauren silver lead zinc ore belt. As for S, Pb, H and O isotopes, fluid inclusions on the basis ofthe study, the source of ore-forming material are discussed, in order to identify the hydrothermalproperties and genetic type of the deposit, the main types of ore deposits are porphyry and epithermal.The formation of deposit and mineralization related to volcano or the subvolcano. The deposits in the study area was divided into a series of mineralization, two metallogenicsub-series, three deposit types, three depositgenetic types based on summary of the space-timeevolution of different deposit, the theory of metallogenic series and metallogenic series classificationprinciples, which are hydrothermal mineralization series related to the Late Yanshanian acid volcaniceruptions-magmatic intrusion; porphyry-type mineralization sub-series and low temperatureepithermal sub-series; Wunugetushan type, Jiawula type, type of dam; porphyry-type,low-sulphidation low-temperature epithermal type, high-sulphidation low-temperature epithermal. Onthe basis of the above study, the regional metallogenic model for the study area was built.Based on the metallogenic regularity of the study area, the deposit ore-controlling factors andprospecting criteria were found. Metallogenic prediction was carried out with regional geophysicaland geochemical anomalies distribution characteristics. Two target areas of mineralization, sixmetallogenic prognosis areas and four metallogenic prospect area were chosen.We have obtained success on the geological prospecting work in this area using this researchresults in2011.120,000tons content of lead and zinc metal,308tons of silver metal has been exploredin Chagan Brad root deep and side area.
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