2) Quartz diorite and granite porphyry have geochemical characteristics similar to those of island arc granitoid
in a subduction zone, and they are formed in the post-collision extension environment after the collision of Lhasa block and Qiangtang block.
Ten analyses of the granitoid
classify as granite of alkaline character.
1, 7)--Over the weathered granitoid
batholith lie down first polygenic conglomerates and minor sandstone bodies; they locally contain some pebbles of Triassic dolostones.
1990; Vernon 1990), the rheology of host magmas and the tectonic environments of granitoid
rocks, as well as on the interaction between the continental crust and the mantle (Didier et al.
Almost all granitoid
intrusive rocks in New Brunswick were sampled at that time, although difficulties involving access and exposure meant that some plutons, including most of the granites discussed herein, were only examined at a "reconnaissance" level.
Abnormal potassium peak is probably due to potassic alterations in the region's granitoid
It should be noted that with decreasing the content of refractory clay and simultaneously increasing the quantity of granitoid
screenings and dolomite, the rise of the diffraction peaks of anorthite is noted, the formation of which is explained by the reaction between CaO, arising during the decomposition of dolomite, with metakaolinite formed during firing of clay and quartz, the introduced with quartz sand.
It reflects wave erosion of the klint escarpment, but also an increased content of granitoid
material of the rapakivi formation.
29) does not crop out within the area of Figure 28, but it is considered to be the source of the granitoid
clasts that occur in sedimentary breccia-conglomerates that ate penecontemporaneous with ore deposition (Thurlow 1981; Stewart 1987).
From El Baul granitoid
units, Mogote Granite has been considered the external mass of the batholith .
The methodology introduced in this paper can be applied both for vertical gradient maps useful in areas where contact zones are near vertical, such as Precambrian meta-volcanic areas, and for horizontal component mapping useful in granitoid
areas which often have shallow dipping contacts.
Migmatization is widespread, resulting in the formation of plagioclase and potassium-feldspar porphyroblasts and occasionally charnockitic leucosomes, also of small granitoid
veins and bodies.
The "younger" Devonian event is characterized by intrusion of peralkaline, metaluminous, and peraluminous granitoid
stocks and batholiths.
massifs of Carboniferous age seem to be cut by the fault: the Strzegom-Sobotka Massif is only partly exposed from below Cainozoic sediments on the hanging wall, and the Zulova Massif reveals a sharp tectonic contact with the Zlote/Rychlebske Mts.
This fragment of granitoid
stone bears portions of a decree of Ptolemy V Epiphanes (196 BC) written in three scripts--Greek, demotic and hieroglyphic--a transcription of which, 20 years later, enabled Jean-Francois Champollion to decipher for the first time the enigmatic ancient Egyptian script.