Cermin Kompas untuk Dandan? 101 Penggunaan Kompas (Pengukuran Strike and Dip)

Summary

This video explains how to use the Brunton 5010 compass, a vital tool for geologists in the field. The presenter breaks down the compass’s components, including the main box, magnetic needle, leveling bubbles, setting arm, and mirror, which all play a role in measuring geological features such as strike and dip. With practical demonstrations and tips, viewers learn how to take precise measurements of rock layers' orientations, enhancing fieldwork accuracy. The video provides essential insights on how to use this essential geological instrument effectively.

Takeaways

• 😀 The Brunton Compass is a crucial tool for geologists working in the field, often used to measure geological features such as strike and dip.
• 😀 The compass is housed in a protective leather case, available in various colors, to safeguard it from damage during fieldwork.
• 😀 The main components of the Brunton Compass include the compass box, the setting arm, and the protective cover.
• 😀 The compass features a magnetic needle that indicates the direction of north and south, which are key for orientation.
• 😀 There are two levels on the compass: a bullseye level for checking horizontal alignment and a clinometer level for measuring inclination or tilt.
• 😀 The compass also includes a graduated scale ranging from 0° to 360°, used to determine azimuth, with 0° representing north, 90° east, 180° south, and 270° west.
• 😀 The setting arm, or sighting arm, helps aim the compass towards specific geological features for measurement.
• 😀 The mirror in the protective cover assists in reading the compass when the main face is difficult to view in certain conditions.
• 😀 A sighting window is also part of the compass cover, which helps when targeting specific geological features for measurement.
• 😀 The compass is used to measure geological features such as bedding planes, strike, and dip by aligning the compass with the rock layers in the field, using left-hand principles for accurate reading.

Q & A

What is the primary purpose of a Brunton compass in geological fieldwork?

The primary purpose of the Brunton compass is to measure and determine the orientation of geological features such as rock layers, faults, and other structures. It helps geologists identify the strike and dip of rock formations.

What is the significance of the protective leather casing for the Brunton compass?

The protective leather casing serves to shield the compass from damage in the field. It protects the compass if it is accidentally dropped, as the instrument is delicate and expensive.

What are the main components of the Brunton compass?

The main components of the Brunton compass include the main box (housing the magnetic needle), the leveling components (bubbler and clinometer levels), the graduated scale (azimuth scale), the setting arm (for aiming at targets), and the mirror (for aiding visibility).

What does the magnetic needle in the Brunton compass indicate?

The magnetic needle in the Brunton compass indicates the North-South direction. The needle points to the magnetic North (0°) and South (180°), which serves as a reference for determining other directions.

How does the leveling system in the Brunton compass work?

The leveling system in the Brunton compass includes a bubbler level, which ensures the compass is horizontal, and a clinometer level, which is used to measure the tilt or dip of rock layers, ensuring accurate angle readings.

What is the azimuth scale on the Brunton compass, and how is it used?

The azimuth scale on the Brunton compass ranges from 0° to 360°, with 0° representing North, 90° East, 180° South, and 270° West. It is used to measure and record the direction of geological features like rock layers and faults.

What is the function of the setting arm on the Brunton compass?

The setting arm on the Brunton compass is used to aim at a geological feature or object, helping to measure its direction or orientation accurately.

Why is the mirror on the Brunton compass important?

The mirror on the Brunton compass is crucial for reading the compass when direct sight is difficult. It helps geologists see the compass dial and take accurate readings, especially when the compass is not easily visible due to environmental conditions.

How do you measure the strike and dip of rock layers using the Brunton compass?

To measure the strike, place the compass flat on the rock layer and align the setting arm with the strike direction. For the dip, use the clinometer to measure the angle of the layer’s slope. Ensure the compass remains level for accurate readings.

What is the left-hand rule, and how is it used in geological measurements?

The left-hand rule is a technique where the geologist points their left index finger in the direction of the strike and their thumb in the direction of the dip. This helps align the compass and take accurate measurements of rock layer orientation.