Liuhe gold orefield is being newly explored in the southeast part of Jiapigou ore belt, and occurs Neoarchean basement composed trondhjemite–tonalite–granodiorite (TTG). Zircon U–Pb data suggest that ore-hosting magma emplacement mainly took place two epochs: late to early Paleoproterozoic (ca. 2500 Ma) Jurassic Mesozoic era 170 Ma). The TTG rocks show higher A12O3 (12.58 15.71%) Na2O/K2O ratio...

Archean supracrustal rocks from the Qingyuan area of northern Liaoning terrane, North China Craton, occur as enclaves or rafts various scales within tonalite–trondhjemite–granodiorite (TTG) domes. They were normally subjected to metamorphism at amphibolite facies with locally granulite facies. We collected biotite two-feldspar gneiss Hongtoushan and conducted petrography, mineral chemistry, pha...

Understanding how the Earth’s first continental land masses were generated is important because the processes responsible directly affected the evolution of the planet’s primordial silicate interior, and also its atmosphere and hydrosphere. Archaean continental crust is dominated by rocks of the trondhjemite–tonalite–granodiorite (TTG) suite. These can be divided into (1) a midto late Archaean ...

Abstract The oldest geological materials on Earth are Hadean (>4 Ga) detrital zircon grains. Their chemistry and apparently low Ti-in-zircon temperatures (?700 °C) considered to be inconsistent with crystallization in a magma of the tonalite-trondhjemite-granodiorite (TTG) suite, although these dominant Archean (4.0–2.5 silicic rocks. Using new data set trace element contents zircons fro...

Geologists are acquainted with the principle of uniformitarianism, which holds that present day processes are the key to those that operated in the past. But the extent this applies to the processes driving the growth and differentiation of the continental crust throughout the Earth history remains a major controversy in earth sciences. An important part of the discussion circles around the pre...

The genesis of intermediate-felsic rocks and the implications for crustal growth are highly controversial. These issues particularly relevant to large igneous provinces, which one most effective methods generation. Mafic magmas, even those with continental marks, have been considered as contribution from mantle crust, whereas series in provinces has uncertain due uncertainty about their modes I...

Abstract The Bundelkhand craton in central India consists mainly of abundant high-K granitoids formed at the Archaean-Proterozoic boundary and several enclosed rafts TTGs (tonalite-trondhjemite-granodiorites) up to 3.5 Ga. Therefore, is a key locality for studies on Archaean crustal growth emergence multisource granitoid batholiths that stabilised supercontinent 2.5 Based their geochemical char...