关键词: 江西灵山, 杂岩体, 成矿地质特征, 成因机制

Abstract:

The Lingshan granitic pluton is located at Huaiyu depression in the southern belt of Qinhang junction, Jiangxi Province. It
occurs as a multistage batholith in a circle shape. The whole-rock SiO2 contents of the Linshan granite range from 69.16 wt.% to 76.45
wt.%, and the contents of K2O+Na2O range from 6.41 wt.% to 9.44 wt.%. They are acid to ultra-acid, and belong to the high K
calc-alkaline to shoshonite series. The Rittmann Index is in an average of 2.42. They are enriched in Rb, Th, U, Nd, Hf, Zr, Y, Nb and
Ta, but depleted in Ba, Sr, P and Ti. The total REE contents are in the range of 79.08×10-6～629.88×10-6. The ratios of La/Yb are in
the range of 4.66~20.86, while the δEu values range from 0.11 to 0.45, with strong negative Eu anomalies. The authors analyzed the
intrusive contact relationship between the different units of the complex after“Mineral resources geological survey for Lingshan area in
Jiangxi province”. The data show that the complex pluton was controlled by the northeast to northwest fracture intersection. The locally
intracontinental extension environment induced the A-type granitic melts ascending and emplacement from southwest to northeast as
asymmetric inflatable balloons. Their rock- and ore-forming ages are around early Cretaceous. Geyuan-Zhangcun is a potential area to
find ore deposits similar to those associated with the Lingshan granitic pluton.

Key words: lingshan in Jiangxi province, complex pluton, ore-forming characteristics, ore-forming mechanism