Abstract. Earth's long-term cycling of carbon is regulated from mid-ocean ridges to convergent plate boundaries by mass transfers involving mantle rocks. Here we examine the conversion peridotite listvenite (magnesite + quartz rock) during CO2 metasomatism along basal thrust Semail Ophiolite (Fanja, Sultanate Oman). At outcrop scale, this transformation defines reaction zones, serpentinized per...

The vein-type Chomalu polymetallic epithermal deposit, located in the Tarom-Hashtjin Metallogenic Province (THMP), western Alborz, formed two separate mineralized zones controlled by fault within andesite and olivine basalt host rocks. deposit occurs adjacent to Varmarziar quartz monzonite, monzodiorite, monzosyenite intrusions. Ore mineralization consists of three stages; (i) an early stage do...

Exhumed fossil subduction zones are archives of the deformation conditions and mechanisms from depths not directly accessible. Microstructural analysis samples exhumed therefrom offers insights into micromechanics processes associated with such as earthquakes, slow aseismic creep. Subducted continental metasediments Tuscan Metamorphic Units Italian Northern Apennines contain a mylonitic foliati...

This study presents rock slab and thin section reflection mapping, element mapping by Micro-XRF (μ-XRF) analysis, in situ cassiterite U-Pb laser ablation-inductively coupled plasma mass spectrometer (LA-ICP-MS) ages of the Xinlu Sn-Zn deposit, Nanling Sn-W belt, South China. The new results provided constraints on age processes Sn mineralization thus further discussed role Paleo-Pacific plate f...

The grade of a quartz ore is not a measure of its chemical reactivity. A high grade quartz sample (B) showed low reactivity in sodium silicate production. Structural imperfection usually occurs due to lattice defects in the quartz tetrahedron as a result of several substitutions that happen during mineralization. The random distortion of the quartz tetrahedron that could be affected by various ...

the knowledge of variations in the superficial veins is of clinical importance for the anatomist, radiologists, clinical practitioners and surgeons in order to plan about the operative procedures. usually cephalic vein drains into the axillary vein. in this case report study the left cephalic vein communicates with the left external jugular vein and made a common trunk at the superior surface o...

Abstract The Kawatuna area has a complex geological structure condition and is estimated to be weak zone for hydrothermal solutions rise then accumulate into deposits in the form of veins. Based on this, it makes this interesting study. This study aims determine its influence distribution veins area. method used surface mapping structures analysis. mapping, was found that composed schist rock u...

Three of the largest granite porphyries northern Portugal were studied to improve current knowledge on regional felsic vein hypabyssal magmatism. All exhibit microcrystalline groundmasses variable granularity (composed quartz, K-feldspar, and muscovite), plagioclase, biotite, cordierite phenocrysts, antirapakivi rapakivi feldspars, embayments in enrichments rare metal incompatible elements. The...

It is common among many vein–type tungsten deposits in southern China that the thickness of ore veins increases from <1 cm to >1 m with increasing depth. A five–floor zonation model for vertical trend vein morphology was proposed 1960s and has been widely applied predicting bodies at deeper levels, but causative mechanisms such a remain poorly understood. The Piaotang tungsten–tin deposit...

Abstract Our recent paper (Nishiyama et al. in Earth Planets Space 73:126, 2021) suggested that the sealing time of a crack-seal event recorded quartz-filled shear veins Makimine mélange may temporally increase or decrease. Nishiyama (Earth describes optical estimates vapor–liquid ratio primary two-phase fluid inclusions between solid inclusion bands veins. The variation was used as an indicato...