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The Potential for Diamond-Bearing Kimberlite in Northern Michigan

The Potential for Diamond-Bearing Kimberlite in Northern Michigan 2025

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The document 'Geological Survey Circular 842' discusses the potential for diamond-bearing kimberlite in Northern Michigan and Wisconsin. It details historical diamond discoveries in Wisconsin, introduces the recently found Lake Ellen kimberlite in Michigan, and explores possible cryptovolcanic structures that may indicate the presence of additional kimberlites. The authors suggest that drift diamonds found in Wisconsin could originate from local sources rather than distant Canadian kimberlites, emphasizing the need for further exploration to uncover more kimberlite bodies in the region.

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Are there kimberlite pipes in the US?

Most of the worlds kimberlites occur in South Africa, where over 3,000 kimberlite pipes have been found. Over 200 are known in North America, of which about 40 occur near the Colorado-Wyoming state line.

Where do you find diamonds in Michigan?

More than 20 kimberlites have been discovered since 1971, and these post- Ordovician intrusions follow a general northwest trend through Iron, Dickinson, and Menominee Counties from Crystal Falls to Hermansville. Many kimberlites in Northern Michigan contain diamonds, while some appear to be barren.

Can diamonds be found in kimberlite?

There are two main magma types that carry natural diamonds to the surface. These magmas crystallize on cooling into volcanic rocks known as kimberlite and lamproite (see box A). Kimberlite is by far the dominant type of eruption to bring diamonds to Earths surface (figure 1).

Are there diamonds in the upper peninsula of Michigan?

While there was considerable interest in diamond exploration in Michigans Upper Peninsula and northern Wisconsin for several years, no diamonds of commercial interest have been found.

What gems can be found in Michigan?

The various forms of quartz are most abundant. Included are clear crystal quartz, rose and smoky quartz, agate, banded chert and jasper. Some of the larger boulders have other minerals, such as tourmaline. Some of the rocks found in these gravel pits also polish very well.

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What states in the US can you find diamonds?

In the U.S., diamonds have been found in Arkansas, Colorado, New Mexico, Wyoming, and Montana.

Can you find kimberlite in Michigan?

The recently discovered Lake Ellen kimberlite, in northern Michigan, indicates that bedrock sources of diamonds found in glacial deposits in the Great Lakes area could lie within the northern U.S. Magnetic surveys show a main kimberlite 200 m in diameter and an adjacent body 25 x 90 m(?).

The Potential for Diamond-Bearing Kimberlite in Northern Michigan 2025

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Are there kimberlite pipes in the US?

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What gems can be found in Michigan?

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