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✳️Cinnabar is a toxic mercury sulfide mineral with a chemical composition of HgS. 🔷It is the only important ore of mercury. It has a bright red color that has caused people to use it as a pigment, and carve it into jewelry and ornaments for thousands of years in many parts of the world. Its […]
🔷Kimberlites, named after the town of Kimberly, South Africa, where they were first described, are volcanic rocks that originate in Earth’s mantle.🔷They are mined exclusively for diamonds. The photo shows the “Big Hole” at Kimberly.🔷The Hole was mined from 1871 to 1914 and reached a depth of 240 m below the surface. Subsequently it filled […]
Geological Time Scale The geological time scale is a system of chronological measurement that relates geological events and geological time to a numerical scale. It is used to describe the timing and relationships between events that have occurred throughout Earth’s history. The time scale is divided into four main parts: Eons, Eras, Periods, and Epochs. […] Table of Contents Toggle Geological Time Scale
What are Rare Earths? The Japanese call them “the seeds of technology.” The US Department of Energy calls them “technology metals.” They make possible the high tech world we live in today – everything from the miniaturization of electronics, to the enabling of green energy and medical technologies, to supporting a myriad of essential telecommunications and defense systems. […] Table of Contents Toggle What are Rare Earths?Which Elements ...
Geology 101 is the study of the Earth and its materials, structures, processes, and history. It is a broad field that encompasses many different disciplines, including mineralogy, petrology, paleontology, and geophysics. Geologists study the Earth’s physical features, including its rocks, minerals, soils, and water. They also study the Earth’s internal structure and the processes that […] Table of Contents Toggle Why Study Geology?What Do GEOSCIENTISTS ...
What is Volcano I heard about the volcano before 🤔??….We all see volcanoes in movies and news, but did you ask yourself why or how do they happen? On our trip today, we will explore the volcano and see its formation, why it happens, and how.. Are you ready, hero ??Let’s start our journey The […] Table of Contents Toggle What is VolcanoOne ...
An unconformity is a surface of erosion or non-deposition that separates two rock units that have different ages. It represents a time gap in the geologic record, and it occurs when sedimentary rocks are tilted, uplifted, and eroded before new sediment is deposited on top of them. There are three types of unconformities: Disconformities A […] Table of Contents Toggle There are three types of unconformities:
Minerals are homogeneous, naturally occurring, inorganic solids that have a definite crystalline structure and chemical composition. In 1995, the World Minerals Organization put another definition saying that “a mineral is an element or a chemical compound that is naturally crystalline and formed as a result of geological processes.”Minerals have their own specific physical properties which […] Table of Contents Toggle Minerals are classified according to their chemical composition.
The difference between mineral, metal and ores Many people confuse three completely different classes of substances (minerals, ores, and metals), so that metal becomes a mineral, and all minerals become ores. Minerals Minerals are inorganic solids (elements or compounds) that have distinct physical properties. Each substance has a known atomic structure and a fixed chemical […] Table of Contents Toggle MineralsOres materialsMetals
Geology online Quizzes questions and answers. Free online quiz with multiple-choice questions (MCQ) without registration. Geology Multiple Choice Questions geology questions and answers | geology questions for competitive exams | geology exam questions. Geology quiz questions and answers.geology quizes. Geology online quiz.
A skarn deposit is a type of mineral deposit that forms in contact metamorphic environments, typically at the contact zone between igneous intrusions and carbonate-rich sedimentary rocks. Skarns are characterized by the replacement of the original rock minerals by a diverse range of minerals, includRead more
A skarn deposit is a type of mineral deposit that forms in contact metamorphic environments, typically at the contact zone between igneous intrusions and carbonate-rich sedimentary rocks. Skarns are characterized by the replacement of the original rock minerals by a diverse range of minerals, including economically valuable ore minerals.
Skarn deposits are commonly associated with rocks such as limestone, dolomite, and marble, which are rich in calcium and magnesium carbonate. When a hot, mineral-rich fluid, often associated with the intrusion of a granitic magma, interacts with these carbonate rocks, chemical reactions take place. This process leads to the formation of new minerals, such as garnet, pyroxene, wollastonite, and various sulfide minerals like chalcopyrite and sphalerite.
Skarn deposits can contain significant economic concentrations of minerals, including copper, iron, zinc, tungsten, molybdenum, gold, and silver. The mineralization within skarns can occur in various forms, including disseminated grains, veins, and massive replacement bodies.
These deposits are of great interest to mining companies due to their potential for extracting valuable metals and minerals. Skarns are often targeted through exploration efforts, and once identified, they can be developed into profitable mining operations.
It’s worth noting that specific geological details and characteristics of skarn deposits can vary from location to location, as they are influenced by the composition of the intruding magma, the nature of the surrounding carbonate rocks, and the duration and intensity of the hydrothermal alteration processes
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