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.
