首页|期刊导航|中国地球化学学报（英文版）|Characteristics of mantle branch structure in western Shandong and its roles in minerogenesis and ore-controlling
中国地球化学学报（英文版）2006，Vol.25Issue(4)：340-353,14.
Characteristics of mantle branch structure in western Shandong and its roles in minerogenesis and ore-controlling
Characteristics of mantle branch structure in western Shandong and its roles in minerogenesis and ore-controlling
摘要
Abstract
This work deals with the characteristics of mantle branch structure in western Shandong Province, China, with respect to the distribution characteristics and ages of the regional strata, the development of ring-like and radial faults, the development of gently inclined detachment-slip structures in the axial part, mantle-source magmatic activities, regional petrology, petrochemistry and isotope geology. The study indicated that the N-W sharply plunged ductile shear zone in the region of western Shandong cuts through the mantle rocks detached from the deep-seated North China mantle sub-plume, hence leading to unloading in response to depressurization and thereafter the formation of anatexis magma. The intense and complete magmatic evolution series not only manifests a variation trend of alkalinity of magma from high to low and its intrusive depth from deep to shallow, but also reflects that the wall-rock alteration shows a general evolution trend from strong to weak. The evolution of mantle structure played an important role in controlling endo-mineralogenesis, accompanied with the rise of the country rocks. As a result, typical mantle branch structures were formed as observed in western Shandong. At the top of the mantle branch structure was developed an obvious detachment-tilt fault block, and some endogenic ores, at the same time, were uplifted onto the shallow levels.关键词
mantle branch structure/mantle plume/tectonic evolution/tectonic ore-controlling/minerogenesis/region of western Shandong ProvinceKey words
mantle branch structure/mantle plume/tectonic evolution/tectonic ore-controlling/minerogenesis/region of western Shandong Province分类
天文与地球科学引用本文复制引用
SUN Aiqun,HU Huabin,NIU Shuyin,MAO Jingwen,WANG Debao,LI Yingping,WANG Laiming..Characteristics of mantle branch structure in western Shandong and its roles in minerogenesis and ore-controlling[J].中国地球化学学报（英文版）,2006,25(4):340-353,14.基金项目
This research project was financially supported jointly by the National Natural Science Foundation of China (Grant No. 40272088), the Large-scale Geological Survey in China (No. 2000110100038) and the Central Mining Funds (2003-20). （Grant No. 40272088）
