安徽安庆月山岩体的磁组构及古地磁特征

ON MAGNETIC FABRIC AND PALAEOMAGNETISM OF THE YUESHAN PLUTON, ANQING, ANHUI

本文通过对安徽怀宁月山闪长岩体的31个采点、300多个样品的磁组构及古地磁的测量及研究表明:1)岩体形成时,各区都有岩浆侵入通道,并推断出3个通道的大概位置;2)岩体各区所遭受的应力场其强度、方向不同,反映了区域应力场的时、空特征;3)岩体北区形成最早,南、东区较晚,并非同期成岩;4)指出了区内寻找隐伏矿床的最有利部位。

The study of magnetic fabric and palaeo-magnetism of 300 specimens, which were taken from 31 sets in the Yueshan diorite, Anqing, AnHui, presents as follows: l) The pluton can be divided into three regions, every region has its magmatic passage, situations of which are detected. 2) Intensity and direction of stress fie-lds of these regions are different, which shows the character of time and space in the regional stress field. 3) Formation age of the northen region of the pluton is the eldest in these regions, which were not formed in the samt time. 4) The fa-vourable area seeking for deposits is the easten region of the pluton.