The Alxa Block is located in the middle part of Central Asian orogenic belt, which coupling belt North China, Tarim, and Kazakhstan Plates. east–west-trending deep faults control stratigraphic distribution magmatic activity region. To detect EW-trending ore-controlling structures, a 440 km NS section magnetotelluric sounding was conducted from Minle to Ejinaqi. phase tensor electrical principal...

Abstract Several swarms of parallel E–W dikes cuts late Neoproterozoic- to early Paleozoic (540 Ma) basement in the Biarjmand area, NE Iran. The microgabbroic doleritic dike are several hundred meters long and 0.5 3 wide. U–Pb dating their zircon grains yields a crystallization age 46.0 ± 7.1 Ma for swarms. have SiO2 contents 46.0–49.3 wt%, Fe2O3 9.80–14.8 wt% with variable MgO (4.92–9.16 wt%),...

The Beemerville alkaline complex, New Jersey, occurs at the western end of the CortlandtBeemerville magmatic belt. The eastern end of the belt is defined by the Cortlandt complex, New York, which largely consists of ultramafic and mafic rocks. Between these two intrusive centers is a linear almost east-west trending zone of lamprophyre and felsic dikes. The Beemerville complex consists of two l...

The Wulonggou Gold Field is one of the giant gold fields in East Kunlun Orogenic Belt, northwestern China. Previous studies mainly focused on elementary mineral isotopic studies, fluid inclusions, and geological features Field. In this study, we report some research precise age specific ore-forming process WGF: hydrothermal monazite U–Pb ages; way precipitation; composition, evolution, source f...

kuh-e-siah is located in the north of gavkhuni lagoon and east of the varzaneh (se of isfahan) and is a part of urumieh-dokhtar magmatic arc (udma). the volcanic rocks of this area are vesicular basalt and basaltic andesite with late miocene age. the most common textures of these rocks are porphyry, microlitic porphyritic, hyaloporphyric and vesicular. plagioclase, olivine and clinopyroxene are...

The Cauca metallogenic belt is an inter-Andean area located along the Cauca-Romeral fault zone, which made up of a group twelve Miocene magmatic-hydrothermal Au-Ag-Cu mineral deposits positioned between Western and Central Cordillera Colombia. In addition to being widely developed region in exploration exploitation with known Au endowments over 1,700 tons, this represents exceptional metallogen...

The Avaj Oligocene volcanic – plutonic complex is part of extensive Cenozoic magmatic activity within the Urumieh-Dokhtar arc Iran. We use whole rock geochemistry, mineral compositions and crystal size distributions (CSD) in a suite co-genetic basalt, basaltic andesite gabbro to determine their petrogenesis. Ca-rich cores plagioclase (An79-86) overlap empirically modelled compositions, indicati...