References in periodicals archive ?
La FIGURA 6 ilustra las paragenesis minerales tipicas de las rocas metamorficas de la Formacion Filitas y Esquistos de Busbanza del Macizo de Floresta.
Se encuentra en paragenesis con otros minerales del grupo de la halotriquinita como la halotriquinita y wupatkiita, principalmente como agregado cristalino tipo corteza.
A partir de la paragenesis actinolita + plagioclasa + epidota, se deduce que el metamorfismo pudo ocurrir en las facies esquisto verde o anfibolita baja (Bucher & Frey, 2002).
The peak paragenesis is believed to have been formed by partial melting reactions.
The mineralization appears to be associated with the fault zones with NE-SW strikes, and it exhibits a mineral paragenesis of pyrite-sphalerite-zinkenite-stibnite-gold.
In addition, both megacryst and ecologite paragenesis garnets are well-represented in this kimberlite.
Its geological value is accounted for by its location in the Andes Cordillera where, due to its intense and recent orogenesis, deposits with large reserves, better grades and attractive paragenesis are found.
Based on this previous work (Carrington, 1997 and Akright, 1997), "this gold mineralization is directly analogous to the famous Fortitude deposits in terms of structure and igneous association, ore and gangue mineralogy, paragenesis, age and host rock type.
En el porfido P1 se reconocen: alteracion potasica (Pot) con la paragenesis BtII+Fsp II (remanentes)+Chl I; alteracion propilitica (Prop) cuya paragenesis es Chl II+Cb+Ep y alteracion cuarzo-sericitica (QzSer) en la cual se presenta Qz+mica blanca+Py.
Subsolidus alteration is manifested by the formation of a secondary paragenesis mainly consisting of chlorite, sericite and a secondary green--to colourless amphibole (Mg-hornblende to actinolite and cummingtonite) at the expense of the primary minerals.
The humite-group minerals have a limited paragenesis and occurs in marbles and skarns generated by contact metamorphism.
Varian desde paragenesis de baja temperatura, inferior a 200 "C (illita-esmectita, clinoptilolita-zeolita, barita, dentro de ellas heulandita), de baja a media temperatura, quizas alta (piemontita, granate, diopsido), y de alta temperatura (escapolita) cerca de los contactos Igneos (Gursky & Gurshy, 1989; Halbach et al.