WebDec 1, 2012 · However, alteration by strongly acid fluids also affected spodumene, leading to formation of fine-grained white mica in zones III and IV. In this paper, we focus on the occurrence of nodules of corundum + tourmaline, which are typically restricted to the aggregates of white mica in zone IV. WebMay 21, 2024 · White mica and tourmaline are the dominant hydrothermal alteration minerals at the world-class Panasqueira W–Sn–Cu deposit in Portugal. Thus, …
Geochemistry and petrography of gold-quartz-tourmaline veins of …
WebFeb 1, 1997 · Gregory Lynch, Jorge Ortega; Hydrothermal alteration and tourmaline-albite equilibria at the Coxheath porphyry Cu-Mo-Au deposit, Nova Scotia. The Canadian Mineralogist 1997;; 35 (1): 79–94. doi: . Download citation file: WebJul 1, 1995 · This deposit shows widely important tourmaline alteration. Based on petrographic observations, four generations and eight occurrences of tourmalines are identified in the Baotan tin deposit. The first generation is late-magmatic tourmalines and occurs as disseminated (Tur1a) and tourmaline–quartz nodule (Tur1b) in the Pingying … terry walter hamar nd
The geology, mineralization, and alteration of ... - GeoScienceWorld
WebOct 1, 2024 · Secondary mineral assemblages replacing tourmaline and chlorite geothermometry suggest evolution of the PT conditions of tourmaline alteration from T ~ … WebSep 27, 2011 · Sample 330.1; g tourmaline breccia from the Silvita mine including large fragments of diorite with potassic alteration and supported by quartz and tourmaline. … WebMar 1, 2024 · Tourmaline crystallized during iron oxide and alkali-calcic alteration and IOCG mineralization in the Great Bear magmatic zone, Canada. Within the samples analyzed, … trilogy mouthpiece ventilation set up