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Zircon U‐Pb Dating of Granite Porphyry of Sanmianjing Pb‐Zn‐Ag Deposit in Inner Mongolia, and Its Constrains on Mineralization Age
Author(s) -
SHAO Yongjun,
QUAN Wei,
ZHENG Liming,
YE Zhou,
LUO Meiyan,
GUO Biying,
ZHAO Zhiqiang
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 - 10.1111/1755-6724.12378_20
Subject(s) - christian ministry , mineralization (soil science) , zircon , geology , inner mongolia , geochemistry , archaeology , geography , political science , china , soil water , soil science , law
The geotectonic position of Inner Mongolia Sanmianjing Pb-Zn-Ag deposit which is belongs to part of edge of the Inner Mongolia plateau southeast arc is located in Yinshan east-west complex tectonic belt and Great Khingan uplift fold belt uplift area. The main outdoor layer of this diggings is mainly the Sanmianjing group of lower Permian system whose lithology are mainly tuff, a ribbon of silicified limestone, crystal limestone, biological reef limestone and a small amount of sandstone, and the Pliocene series of tertiary and quaternary whose lithology are mainly shale containing calcium tuberculosis and clay rock. The structures of this digging are mainly north-west trending faults and north east trending faults. The Northwest trending faults are located in the granite porphyry. And their strike is 300° or so, their dip is NE30°or so and their dip angle is nearly erect (78±5°). They belong to shear extensional fault. Their width is between 1.5 to 3 m. Park of them present little undulatory. The northwest trending faults are the main ore-controlling structure and ore-hosting structure of this digging. The northeast trending faults are posterior ore-forming structure. Magmatic activities are strongly in this diggings, the Yanshanian magmatic rocks which are mainly consist of granite porphyry and like a cloud porphyritic granite porphyritic-like biotite granite are the main magmatic rocks, ore-hosting rocks are mainly granite porphyry.