However, all the Cu-Mo deposits discovered in this district are associated with porphyry-skarn system, spatially relevant to granodiorite and granite porphyry stocks (e.g., Tongshankou and Fengshandong Cu-Mo deposit) [22, 24].
However, the Yinzu and Yangxin batholiths are similarly made up of quartz diorite, the latter having minor granite porphyry [16, 17].
Ore body III is distributed along structural fracture belt (F1) north to east, which belongs to ore body of iron, copper and gold under control of structural fracture belt and iron-oxide copper gold (IOCG) ore body, whose formation may be related to the intrusion of aplite and granite porphyry and activities of north-east fault.
The weighted average U-Pb age of granite porphyry zircon is 83[+ or -]1Ma, which is about 4 Ma later than quartz diorite (Yao et al., 2012).
The emplacement of quartz diorite and granite porphyry both happened in Late Cretaceous and notably after a collision between Lhasa plate and Qiangtang plate.
Fyffe (1998) noted that the Jake Lee Mountain pluton has a core of medium-to coarse-grained, equigranlar riebeckite-bearing granite enveloped by a fine-gained rim of rapakivi granite porphyry
. Limited exposure in the area does not preclude the presence of that fine-grained rim of the Jake Lee Mountain pluton everywhere against the Utopia Granite (L.R.
87 for the Munger Granite Porphyry. Within the precision and scatter of the data, the structural state of the K-feldspar in these rock units is identical to that reported earlier for both the plutonic and volcanic rock units of the Butler Hill Caldera, the major structure that dominates the eastern portion of the St.
Francois Mountains, Mesoproterozoic, Missouri, Graniteville Granite, Munger Granite Porphyry
These intermediate-felsic hypabyssal rocks are mainly composed of quartz porphyry, granite porphyry, granite, felsite, granodiorite, quartz monzonite, and diorite porphyry.
The Early Cretaceous subvolcanic rocks include quartz porphyry and granite porphyry with a small amount of sulfides disseminated in these rocks observed in the drill cores, such as sphalerite and galena.
The Z parameter for three samples of the Munger Granite Porphyry
, a ser ies of ring plutons exposed around the western and southern edge of the caldera, averaged 0.87 with a standard deviation of 0.06.