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Diabase is an intrusive igneous rock with the same mineral composition as basalt. It cools under basaltic volcanoes, like those at mid-ocean ridges. Diabase cools moderately quickly when magma moves up into fractures and weak zones below a volcano.
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www.nps.gov/goga/forteachers/diabase-faq.htm
www.nps.gov/goga/forteachers/diabase-faq.htm
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Thin section analyses of samples collected across the dike indicate that the primary mineral is plagioclase (~60%) with an abundance of opaque minerals ranging from 17-19%. X-ray diffraction analysis of the diabase provided additional information about the mineral composition.
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gsa.confex.com/gsa/2006SC/finalprogram/abstract_99996.h...
gsa.confex.com/gsa/2006SC/finalprogram/abstract_99996.htm
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minerals (Walker, 1953, p. 48). Plagioclase aver- age composition is slightly more sodic than in the diabase, and it may approach albite in composition ...
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econgeol.geoscienceworld.org/cgi/reprint/63/8/950.pdf
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range in chemical composition. Another amphibole occurs as a ..... DIABASE MINERAL DEPOSIT IN ONTARIO. 729. ORE FORMATION. The occurrence of the granophyric ...
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econgeol.geoscienceworld.org/cgi/reprint/24/7/722.pdf
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"diabase" it has been retained in this paper to designate igneous rocks with the mineral composition of members of the gabbro family ...
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www.jstor.org/stable/30058971
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not evolved significantly from its primary composition. The whole rock and primary mineral chemistries of the. Crystal Spring diabase are indistinguishable ...
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www.springerlink.com/index/KQ5390WU428H3305.pdf
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| Mineral List | Rock List | Guidelines for Rock Collections | ... Rock class: Hypabyssal Igneous Rock ... Composition: Plagioclase (labradorite-bytownite and clinopyroxene), with others.
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homepage.mac.com/kvmagruder/earth/collections/Diabase.h...
homepage.mac.com/kvmagruder/earth/collections/Diabase.htm
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Britannica Concise Encyclopedia: diabase ... Rock having the same composition as basalt, but with larger crystals which are just visible to the unaided eye; also called traprock. ... Mineral composition of diabase rock?
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www.answers.com/topic/diabase
www.answers.com/topic/diabase
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What are the uses of diabase rock? ... What type of rock is diabase? ... Mineral composition of diabase rock?
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www.answers.com/topic/diabasic
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