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Diabase

Diabase (dolerite) is a dark-colored igneous rock. It is compositionally equivalent to gabbro and basalt but texturally between them. Diabase is a common rock type. It occurs mostly in shallow intrusions (dikes and sills) of basaltic composition.

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Soil profiles as indicators of mineral weathering rates and …

Basaltic bedrock dissolves quickly, and its weathering rate is therefore important towards controlling the composition of natural waters, soil formation, and CO 2 concentrations in the atmosphere. Despite its importance, however, few reports of basalt or diabase and gabbro weathering rates exist in the literature, and most have been …

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Mechanical activation of diabase and its effect on the …

The diabase was first subjected to dry grinding separately from clinker to increase the amorphous structure by decreasing its crystalline structure and mechanical activation was achieved.The pozzolanic activity of the ground diabase gradually increased depending on the grinding time.

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Radioisotopes in the Diabase Sill (Upper Precambrian) …

the relationship between the diabase sills and the Cardenas Basalt flows. The Bass Rapids diabase sill provides every indication that it was well mixed isotopically when it was intruded, even though during cooling the sill segregated mineralogically and chemically by crystal settling to produce a granophyre on top of the diabase.

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Diabase: Mineral information, data and localities.

A synonym of Dolerite. In the United States, an intrusive rock whose main components are labradorite and pyroxene and that is characterized by ophitic texture. As originally applied by Brongniart in 1807, the term corresponded to what is now recognized as diorite. The word has come to mean a pre-Tertiary basalt in Germany, a decomposed basalt ...

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Diabase: A dark-colored, fine-grained intrusive …

In the United States and Canada, the name "diabase" is used for a dark gray to black, fine-grained, intrusive igneous rock that has a composition similar to basalt and gabbro. The difference between …

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Damage Characteristics of Altered and Unaltered Diabases

The results show that the mineral composition of diabase changes during its alteration, showing increased clay and calcite, and the degradation and evolution patterns of the physical and mechanical parameters ( L F, R σ, V l, and K f) of the altered rocks during freeze–thaw cycles are different from those of diabase, with the altered diabase ex...

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Geologic units containing Diabase

Diabase - Medium- to coarse-grained, quartz-normative tholeiite; composed of labradorite and various pyroxenes; occurs as dikes, sheets, and a few small flows. Includes the dark …

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Geologic units containing Diabase

Diabase - Medium- to coarse-grained, quartz-normative tholeiite; composed of labradorite and various pyroxenes; occurs as dikes, sheets, and a few small flows. Includes the dark-gray York Haven Diabase (high titanium oxide) and the slightly younger Rossville Diabase (low titanium oxide).

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Diabase or dolerite – Geology is the Way

Diabase (or dolerite) is a medium-grained igneous rock with basaltic composition. The term is also synonym of microgabbro. The name comes from the Greek diabasis, …

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Diabase (PAJd;0)

Diabase. Medium- to coarse-grained, quartz-normative tholeiite; composed of labradorite and various pyroxenes; occurs as dikes, sheets, and a few small flows. Includes the dark-gray York Haven Diabase (high titanium oxide) and the slightly younger Rossville Diabase (low titanium oxide). In chilled margins, the Rossville is distinguished from ...

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Soil Chemistry how oxidation and dissolution in diabase …

a diabase and a granitic rock, had been previously cored and stud - ied by workers in the 1990s (Pavich et al., 1989). Both rocks are dominated by plagioclase (58% Ca-rich feldspar in diabase; 52% Na-rich feldspar in granitic rock). Although the diabase con-tained the more fast-dissolving plagioclase composition (An 60),

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Diabase FAQ

Info Alerts Maps Calendar Fees Diabase FAQ Diabase hand specimen Where does diabase form? Diabase is an intrusive igneous rock with the same mineral composition as basalt. It cools under basaltic …

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Properties of Diabase | Physical | Thermal

There are various physical properties of Diabase like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it. The physical properties of Diabase rock are vital in determining its Diabase …

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petrology

Diabase is indeed relatively erosion resistant. One of the reasons is grain size. Consider the two other chemical equivalent of diabase: gabbro (coarse-grained) and basalt (glassy and fine-grained), which should potentially be similarly erosion resistant. This is not the case. Both gabbro and basalt erode very easily.

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Outdoor Geology Laboratory Virtual Tour – 4b Diabase

Diabase dikes are found all along the East Coast of North America. They are considered evidence of the rifting that broke Pangaea apart about 275 million years ago. Diabase is a rock that is very similar in texture and composition to basalt; both are very common in the oceanic crust. When they cool from molten to a solid, both contract strongly.

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substituted for it diabase (d43aoaLs, a crossing over), …

English writers have inconveniently employed the name diabase for a more or less decomposed dolerite." Later, however, Harkers sub-stituted "dolerite" for "diabase" in his definition, otherwise word for word the two are identical. The mode of occurrence, as before, is in dikes, sills, and laccoliths. Of diabase he now said that it is in

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petrology

Diabase is indeed relatively erosion resistant. One of the reasons is grain size. Consider the two other chemical equivalent of diabase: gabbro (coarse-grained) …

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Diabase or Dolerite

Diabase or dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled …

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Pierre de diabase

La diabase est une roche hypabyssale formée à une profondeur relativement faible, occupant - dans sa structure et ses conditions d'occurrence - une position intermédiaire …

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Diabase | rock | Britannica

diabase, also called Dolerite, fine- to medium-grained, dark gray to black intrusive igneous rock. It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap. Although not popular, it makes an excellent monumental stone …

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Diabase

Diabase (dolerite) is a dark-colored igneous rock. It is compositionally equivalent to gabbro and basalt but texturally between them. Diabase is a common rock type. It occurs mostly in shallow intrusions (dikes and sills) …

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Diabase: Description, Characteristics, and Other FAQs

Diabase is a dark-colored, fine-grained, igneous rock that consists mostly of plagioclase feldspar and pyroxene. It forms from the solidification of magma in the Earth's crust and …

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Physicochemical evaluation of oxidation of diabase …

In Study 2, diabase sand from the same origin of Study 1, but in smaller particle size, and natural aggregates (sand) with the addition of pyrite in four levels (0, 0.5, 1.0 and 5.0 %) were immersed in distilled water, with measurements of pH, electric conductivity and total dissolved solids. The results of the tests, under constant …

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Diabase: A dark-colored, fine-grained intrusive igneous rock

In the United States and Canada, the name "diabase" is used for a dark gray to black, fine-grained, intrusive igneous rock that has a composition similar to basalt and gabbro. The difference between basalt, diabase, and gabbro is in their grain size - which was determined by their cooling rates.

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The Strongest Rock in the World – Rockhound Resource

The strongest rock in the world in compression is Diabase, which can stand up to 350 MPa. Diabase is a kind of fine-grained igneous rock. Close behind diabase in compressive strength come other fine-grained igneous rocks like Diorite, Gabbro, and Basalt. Interestingly, the one non-igneous rock in this super strong group is Quartzite.

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Pierre de diabase

La diabase est une roche hypabyssale formée à une profondeur relativement faible, occupant - dans sa structure et ses conditions d'occurrence - une position intermédiaire entre les roches en éruption et les roches profondes (abyssales) d'origine volcanique.

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Geologic units containing Diabase

Earth material Plutonic rock Granitoid Diorite Diabase A plutonic rock whose main components are labradorite and pyroxene and which is characterized by ophitic texture.

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Diabase or dolerite – Geology is the Way

Diabase (or dolerite) is a medium-grained igneous rock with basaltic composition. The term is also synonym of microgabbro. The name comes from the Greek diabasis, meaning 'crossing over', which is appropriate since this rock …

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Diabase (NJJd;5)

Diabase is dense, hard, and sparsely fractured. It is composed mostly of plagioclase (An50-70), clinopyroxene (mostly augite) and magnetite±ilmenite. Accessory minerals include apatite, quartz, alkali feldspar, hornblende, titantite, and zirocon. Olivine is rare. Units Jd and Jg are described together on printed map.

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Pierre de diabase

Dureté (sur l'échelle de Mohs) ... Les bijoux en diabase et en dolérite ne sont généralement pas fabriqués par des bijoutiers, mais par des maîtres tailleurs de pierre: Dans les rayons des bijouteries russes vendant des produits à base de minéraux naturels, vous pouvez trouver des pendentifs, des bracelets, des boucles d'oreilles, des ...

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