Developing Web Contents for Rock-forming Mineral Observation under Polarizing Microscope

Garnet: A Rock-Forming Mineral Petrochronometer

Garnet could be the ultimate petrochronometer. Not only can you date it directly (with an accuracy and precision that may surprise some), but it is also a common rock-forming and porphyroblast-forming mineral, with wide ranging—yet thermodynamically well understood— solid solution that provides direct and quantitative petrologic context. While accessory phase petrochronology is based largely up...

Rock & Mineral Identification Guide Rock & Mineral Identification Guide

Rock and Mineral Weathering Experiments under Model Venus Conditions

Introduction. Chemical analyses of rock and rego-lith at the Venera and Vega landing sites [1] suggest that Venus' surface consists of basaltic rocks with variable amounts of S, either as a primary constituent or as a secondary product of atmospheric interactions. Starting with these chemistries, models of Venus mineralogy predict that the surface is composed of primary basaltic minerals, unrea...

Hydrothermal Fluid Flow and Mineral Alteration in a Fractured Rock under Multiphase

The geochemical evolution of hydrothermal fractured rock systems occurs through a complex interplay of multi-phase fluid and heat flow, and chemical transport processes. On the basis of previous work we present simulations of reactive hydrothermal flow that include (1) detailed fracture-matrix interaction for fluid, heat and chemical constituents, (2) gas phase participation in multiphase fluid...

Heat under the microscope