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The Geochemistry Feature and Geological Significance of Ore‐forming Granites in Caosiyao Molybdenum Deposit, Central Inner Mongolia, China
Author(s) -
WANG Fengxiang,
NIE Fengjun
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12383_16
Subject(s) - beijing , china , inner mongolia , chinese academy of sciences , mineral resource classification , library science , citation , geological survey , geology , geochemistry , mining engineering , history , archaeology , computer science , paleontology
Located in Liangcheng uplift of Inner Mongolia massif (Axis) within the North China Craton, Caosiyao molybdenum is a newly discovered superlarge scale deposit, which lies in center geographic coordinate 113° 52' 37′′E and 40°49' 30′′N. dual structures of stratum were recognized in the region.(1)Archean Huangtuliang formation is the oldest units,which composes of the major part of crystalline basement.(2)the Cover is basically composed of the sedimentary rocks formed since Mesozoic. The regional magmatic activity is strong and complex by means of volcanic eruption and magmatic intrusion. The Precambrian rock is mainly medium ultrabasic plutonic metamorphic rock; the Mesozoic rock mostly contains acid intrusive (or extrusive rock), the main outcropped rock is medium-fine grained porphyritic granite in Late Jurassic and granite porphyry in Early Cretaceous. And again, In terms of structure features, the regional fault structure is well developed mainly along NE -striking, subordinately NW-striking and near SN-striking. It is needed to pointed out that Caosiyao deposit is located in the intersection between regional discordogenic fault and subordinate fault and attributed with extensional structure features (Nie Fengjun, 2012), the subsidiary fracture beam derived from the regional large faults is the main impounding structure.