Mineralogy and Petrology Set 2

What factor primarily determines whether a metallic element concentrates in the liquid fraction during magmatic segregation?

Wind-deposited sediments primarily composed of silt and some clay are known as:

Hydrothermal deposits formed by warm water at a considerable distance from their source are classified as:

Which type of volcanic eruption is characterized by an intensely violent, vertical expulsion of gases and volcanic fragments, resembling a rocket blast?

Which characteristic is LEAST likely to be found in low-sulfidation epithermal deposits where ore-bearing fluids interact with groundwater?

Hydrothermally altered and acid-leached rocks typically exhibit which geophysical signature?

What is the MOST direct method for determining the economic viability of an ore deposit?

Which mineral is a copper carbonate?

The term "Thai Ruby" is typically applied to ruby that:

What reagent is commonly used to identify the presence of feldspar crystals in a rock sample?

In geostatistics, what term describes the measure of the dispersion of sample values around the mean grade?

If natural gas replaces some of the water in a porous, water-saturated sandstone, how would the P-wave velocity change?

Which of the following tectonic settings is LEAST likely to be associated with the development of hydrothermal systems?

Which of the following is NOT a rare earth element?

Igneous rocks containing more than 90% mafic minerals (dark-colored, Mg- and Fe-rich) are classified as:

In a set of sorted sample grades, the middle value is referred to as the:

Which igneous texture is characterized by glass filling the small spaces between randomly oriented feldspar microlites?

Historically, ruby mines have existed in all of the following locations EXCEPT:

A mining project reports the following resources: Measured (100 million MT @ 0.55% Cu), Indicated (300 million MT @ 0.45% Cu), and Inferred (300 million MT @ 0.40% Cu). For public reporting, what tonnage and grade can the company declare?

What trace element is responsible for the dominant red color in rubies?

How is petroleum typically extracted from tar sands and oil shales?

Under what Presidential Decree (PD) No. was the Philippine Environmental Impact Statement (EIS) System established in 1978?

All of the following geophysical surveying techniques are suitable for engineering/construction site investigations EXCEPT:

What is the streak color of Molybdenite?

Which of the following is generally FALSE concerning carbonate-base metal low sulfidation epithermal systems?

Which of the following is NOT a characteristic of high-sulfidation epithermal deposits?

What is the weighted average grade of the resource given the following data: Block size: 5x5x5, Specific Gravity: 3.00 and the grades and % of blocks represented by the grade are as follows? Grade (%): 0.40; Blocks (%): 10 Grade (%): 0.50; Blocks (%): 30 Grade (%): 0.60; Blocks (%): 40 Grade (%): 0.70; Blocks (%): 20

Which of the following processes would LEAST likely result in the degradation of petroleum reservoir properties of a rock?

In assessing the quality of seals associated with a prospect, the following seal characteristics must be examined EXCEPT:

Which of the following statements is generally FALSE regarding skarn deposits?

Which part of a polarizing microscope concentrates light onto the area of the sample immediately beneath the objective lens?

Which of the following minerals is NOT a carbonate mineral?

Given the following data, calculate the approximate tonnage at a cut-off grade of 0.50%: Block Size: 10m x 10m x 3m , Specific gravity: 3 metric tons/m^3. Assume that 100% of the block is mineralized above the cut-off grade.

Which statement about exploration geochemical surveys involving stream sediment sampling is generally FALSE?

Silica deposits commonly found in hot spring environments are known as:

Gravity varies with latitude because of:

Nonmetallic minerals are typically classified by:

Which sedimentary rock would you MOST expect to find having been deposited by a fast-moving stream?

The figure below is the thermal maturation path of three different types of kerogen, plotted with the oxygen-to-carbon (O/C) atomic ratio on the horizontal (x) axis and hydrogen-to-carbon (H/C) atomic ratio on the vertical (y) axis and denoted as A, B, and C. Which one out of the three would you associate to be the type III kerogen? (Assume A has the lowest O/C ratio, and lowest H/C ratio)

The choice of geochemical survey and analytical technique to be used in mineral exploration requires an understanding of all the following EXCEPT:

A coarse-grained rock is composed of 60% Olivine, 15% Augite and 25% Enstatite. According to IUGS classification, this rock is a:

Which optical property of a mineral is defined as the angle between the length or cleavage and one of the mineral's vibration directions under polarized light?

Based on IUGS rock classification, a coarse-grained igneous rock containing 80% potash feldspar, 12% plagioclase, 4% quartz, and 4% biotite would be classified as:

In mineral resource estimation, which resource category indicates the highest level of geological knowledge and confidence?

Which of the following factors is MOST influential in determining whether a metallic element concentrates within the liquid portion during magmatic segregation?

Sedimentary deposits primarily composed of silt-sized particles, often transported and deposited by wind action, are known as:

Hydrothermal ore deposits believed to originate from warm fluids that have traveled a considerable distance from their heat source are classified as:

Which type of volcanic eruption is characterized by a highly explosive, vertical ejection of gases and volcanic material, resembling a powerful, directed blast?

Which of the following characteristics is LEAST likely to be observed in low-sulfidation epithermal deposits where ore-bearing fluids interact with groundwater?

Rocks that have undergone hydrothermal alteration and acid leaching are MOST likely to exhibit which geophysical signature?

The MOST direct approach for definitively assessing the economic viability of a potential ore deposit involves:

Which of the following minerals is classified as a copper carbonate?

The term "Thai Ruby" is COMMONLY used to refer to rubies that:

Which reagent is typically employed to aid in the visual identification of feldspar crystals within a rock sample?

In geostatistical analysis, which term BEST describes the measure of the spread or variability of sample values around the calculated mean grade?

If a portion of the water in a porous, water-saturated sandstone formation is replaced by natural gas, what is the MOST likely effect on the P-wave velocity?

Which of the following tectonic settings is LEAST favorable for the development of hydrothermal systems?

Which of the following elements is NOT classified as a rare earth element (REE)?

Igneous rocks predominantly composed of more than 90% mafic minerals (dark-colored, Mg- and Fe-rich) are classified as:

In a dataset of sorted sample grades, the value that divides the dataset into two equal halves is referred to as the:

An igneous texture characterized by the presence of glass filling the small, angular spaces between randomly oriented feldspar microlites is termed:

Historically, significant ruby mines have been located in all of the following regions EXCEPT:

A mining company's exploration program yields the following resource estimates: Measured (100 million MT @ 0.55% Cu), Indicated (300 million MT @ 0.45% Cu), and Inferred (300 million MT @ 0.40% Cu). According to standard public reporting guidelines, what tonnage and grade can the company reliably declare?

The characteristic red color observed in rubies is primarily attributed to trace amounts of which element substituting into the crystal structure?