NDLI: Characteristics of mantle branch structure in western Shandong and its roles in mine-rogenesis and ore-controlling

Content Provider	Springer Nature Link
Author	Sun, Aiqun Hu, Huabin Niu, Shuyin Mao, Jingwen Wang, Debao Li, Yingping Wang, Laiming
Copyright Year	2006
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.
Starting Page	341
Ending Page	354
Page Count	14
File Format	PDF
ISSN	10009426
Journal	Chinese Journal of Geochemistry
Volume Number	25
Issue Number	4
e-ISSN	19930364
Language	English
Publisher	Science Press
Publisher Date	2006-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	mantle branch structure mantle plume tectonic evolution tectonic ore-controlling minerogenesis region of western Shandong Province Physics
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

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