Long-lived high to ultra-high temperature (HT-UHT) granulitic terranes formed throughout Earth's history. Yet, the detailed processes involved in their formation remain unresolved and notably sequence of appearance duration migmatisation granulites conditions orogenic cycle. These can be evaluated by analytical numerical models. First, solving steady-state heat equation allows underlining inter...

The color-change sapphire occurs in sillimanite-biotite gneiss Fuping County Hebei province, China, is one of most famous deposits China. However, the color genesis, mechanisms changing and compositional characteristics remain enigmatic. In this contribution, coloration sapphire, and, were studied by conventional gemological instruments conjunction with ultraviolet-visible spectroscopy Laser ab...

In the Khibiny and Lovozero alkaline massifs, there are numerous xenoliths of so-called ‘aluminous hornfelses’ composed uncommon mineral associations, which, firstly, ultra-aluminous, secondly, highly reduced. (K,Na)-feldspar, albite, hercynite, fayalite, minerals phlogopite-annite cordierite-sekaninaite series, corundum, quartz, muscovite, sillimanite, andalusite rock-forming minerals. Fluorit...

A large anatectic complex of Hercynian age, the Peña Negra complex, crops out in the central-north area of the Sierra de Gredos, Avila batholith, central Spain. Migmatites and anatectic granitic rocks were generated during the Upper Carboniferous from a Neoproterozoic – Lower Cambrian schist–greywacke complex with minor interlayered orthogneisses. Granitic rocks appear as subhorizontal sheets o...

Single detrital monazite grains from the Dharamsala and Lower Siwalik Formations (early to mid-Miocene continental foreland basin sediments in NW India) have been dated by two techniques; isotope dilution thermal ionization multicollector mass spectrometry (ID-TIMS) and laser ablation plasma ionization multicollector mass spectrometry (LA-PIMMS). The results give U–Th–Pb isotopic ages of c. 400...

Lithological, structural, metamorphic and geochronological data for the North China Craton enable its division into the Western and Eastern Blocks of Archean to Paleoproterozoic age separated by a north–south trending Paleoproterozoic orogenic belt: the Central Zone. The Central Zone is divisible into a series of lowto medium-grade granite–greenstone belts and high-grade metamorphic terrains co...

Pink fibrous crystals within massive rose quartz from localities in California, South Dakota, Brazil, Madagascar, and Namibia were examined with high-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM). This study reveals that the nanofibers in all samples are related to dumortierite. Selected-area electron diffraction (SAED) patterns and HRTEM images in...

Abstract The well NSE-001 is an exploration located in the North Sumatra Basin, Indonesia, which penetrates several formations with overpressure zones that have potential as a drilling hazard this area. results of pore pressure fracture gradient model show response wireline log data based on normal compaction trend has two types mechanisms, namely loading and unloading. Rapid sedimentation deve...

Distinct crustal remanent magnetic anomalies are a strong indicator of rocks with stable natural magnetization (NRM) carriers. The latter able to store information on the history rock over long geological periods, and can therefore be used for variety applications in field paleomagnetism magnetism. Typically, paleomagnetic rock-magnetic studies rely bulk properties. With advent high-resolution ...

Carbon fly ash (CFA) is the principal industrial waste byproduct from burning fossil fuel (coal combustion) for thermal generation of electricity. CFA a gray or black powdery solid that constituted mostly metal oxides (Al, Si Fe and Ca), unburned carbon (UC) other inorganic substance. The management has thus been matter concern given requirement large area land its disposal potential causing po...