endstream <> endobj endobj Diabase dikes occur in regions of crustal extension and often occur in dike swarms of hundreds of individual dikes or sills radiating from a single volcanic center. 0000003072 00000 n endstream <> Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). <> A study has been made of the magnetic properties of several diabase dikes of Precambrian age from the Canadian shield. 93 0 obj This study is the first to systematically examine the orientations and chemical compositions of the diabase dikes intruding the Avalon Terrane of the central Maine coast in order to better understand the stress regime that existed, and the compositions of mafic magmas Recent Examples on the Web It’s made of diabase traprock, which contains iron that causes the cliffs to look lumpen and rusty in the wrong light, precise and resplendent in the right one. Define diabase. / Seyfried, William E; Berndt, Michael E.; Seewald, Jeffrey S. In: Canadian Mineralogist, Vol. Their jointing is usually small cuboidal, wedge shaped or platy, often columnar and sometimes on a very large scale, though generally this structure is not so perfect as in the finer-grained Mafic rocks often also contain calcium-rich varieties of plagioclase feldspar. 72 0 obj 26 pt 3, 01.09.1988, p. … 95 0 obj 70 0 obj <>stream t7������Jo]a�Gp��*����)V�>�����Ӂ*.�tQkg�x��LG�3EO�Ry@f���UBE�a=� �}����uz�&E��U��+� �p�^ <> 90 0 obj Some authors use it to refer to an intrusive rock, commonly occurring as dykes and sills, whose main constituents are labradorite and pyroxene and whose texture is characteristically ophitic or subophitic. The Palisades Sill which makes up the New Jersey Palisades on the Hudson River, near New York City, is an example of a diabase sill. xref Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide, Biological Weathering, Chemical Weathering. Basalt Igneous rock Composition Mafic: plagioclase, amphibole, and pyroxene, sometimes feldspathoids, or olivine. The respective arrangement of individual components or their equivalents, and linking them with the main parameters of the composition of the … Look at your data and produce many stunning graphics, statistics, and printed reports specially designed to show to your health care provider. <> 0000002555 00000 n Diabase Green-grey to dark grey-black, fine to medium grained. endobj 0000010508 00000 n endobj 0000003344 00000 n chemical composition of the rock is very accurate.,' * The rock studied is the granite G-1. Diabase Diabes is green to brown, and contains plagioclase, labradorite, olivine, hornblende, magnetite, limenite, apatite, calcite, pyrrhotite, chalcopyrite, serpentine, clorite, and calcite. 74 0 obj q 77 0 obj The Coronavirus Disease 2019 (COVID-19) pandemic has become a huge threaten to global health, which raise urgent demand of developing efficient therapeutic strategy. Augite, Chlorite, Olivine, Plagioclase, Pyroxene, Pyrrhotite, Serpentine, Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism, Chemical Erosion, Coastal Erosion, Water Erosion. PETROLOGY AND CHEMICAL COMPOSITION OF LUNAR MARE DIABASE NORTHWEST AFRICA 12839: COMPARISONS WITH APOLLO BASALTS. endobj 0000016347 00000 n <> <> 0000002925 00000 n The dike appears to be a member of a swarm of diabase dikes of probable Ordovician age, and are located in the Grenville province of the Canadian Shield. 107 0 obj Tholeiitic diabase dikes of Late Triassic and Early Jurassic age occur in swarms throughout the Appalachians. The problem of optimizing the composition of building materials is currently of great importance due to the increasing competitiveness and technological development in the construction industry. 105 0 obj An east–west trending diabase dyke cuts a north–south dyke and therefore is clearly younger. The filtered solutions were analyzed by ion chromatography (IC) using a Dionex 100 with an IonPac AS-18 column and an IonPac AG-18 guard column for organic acids (acetate, formate + propionate, oxalate, and citrate) and anions (chloride, bromide, and phosphate). WikiMatrix. 0000005668 00000 n endobj endobj 117 0 obj 0000004489 00000 n 0000003378 00000 n composition of the diabase dike. endobj In the United States, an intrusive rock whose main components are labradorite and pyroxene and that is characterized by ophitic texture. 111 0 obj endobj i. Here, we report zircon U–Pb ages determined by laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) along with Hf isotopic, whole‐rock elemental, and Sr–Nd–Pb isotopic data for these diabase dikes. 0000016169 00000 n 0000016585 00000 n Diabase dikes are extensively distributed in the Xiongcun porphyry copper–gold district in the southern margin of the Lhasa terrane. This phenomenon also applies to catalog sand-lime. In the United States, a syn. <> Composition and Classification. 0000002192 00000 n ), the difference of the two rocks being chiefly of structural nature. 0000004781 00000 n Diabases mostly formed with the composition of plagioclase feldspar ( mostly labrador ) and pyroxenes ( augite ). 78 0 obj <> endobj Diabase. 0000006842 00000 n endobj Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. of diabase Ref: AGI ii. Diabases never contain quartz or feldispat in their structure. The mineral composi tion is: Feldspar 60-70X, Pyroxene 4(^, with very minor sulphides. endobj 0 Petrographically all these rocks are now diabases with a basaltic or spilitic chemical composition. endobj Gravity and magnetic data obtained from the Durham Triassic Basin of North Carolina reveal pronounced positive gravity and magnetic anomalies of 10 milligals and 300 gammas, respectively, along the western border of the basin. 85 0 obj Diabase is usually found in smaller relatively shallow intrusive bodies such as dikes and sills.Diabase dikes occur in regions of crustal extension and often occur in dike swarms of hundreds of individual dikes or sills radiating from a single volcanic center.. It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap. 0000000016 00000 n endobj vii. 0000003809 00000 n You can also know more about Diabase and Gabbro Reserves. <> endobj endobj x�cbb�g`b``` S� � <> <> 112 0 obj %PDF-1.4 %���� 115 0 obj endobj Abstract. hornblende), acid plagioclase (oligoclase - andesine), calcic pyroxene, and sometimes a small amount of quartz; also, any rock in that group; the approximate intrusive equivalent of andesite. n 1. A diabase dike swarm in the Kigluaik Mountains consists of dikes that strike northeast (040°) and dip steeply. 0000015843 00000 n Download Citation | COMPOSITION OF DIABASE DYKES AT QUEMONT MINE | An east–west trending diabase dyke cuts a north–south dyke and therefore is clearly younger. 68 0 obj Chemical, petrographic, and diffraction data suggest that the north–south dyke belongs to the tholeiite group and the east–west dyke to the alkali basalt group. 0000002757 00000 n 0000001759 00000 n chemical; composition; diabase; granites; igneous rocks; petrology; plutonic rocks; Rhode Island; United States; Virginia; Centerville; Diabase sample W-1; Sample W-1; Centerville area; Granite sample G-1; Westerly; Diabase W.-1; Latitude & Longitude N36°34'60" - N39°28'00", W83°34'60" - W75°15'00" N41°10'00" - N42°01'60", W71°55'00" - W71°07'00" View Full GeoRef Record. 0000019134 00000 n x�+�5�3P��t^�^}7�xC ?$��I�65��3�0W07��34410UɅ��«adfh�������[H����z�Ƹ�ף�p3#=��8 /HIC �9 114 0 obj endobj <> Chemical composition of pore water can vary based on the method of extracting the pore water (Lloret et al., 2011). Every day we handle many substances which are chemicals and we even consume them. The dike appears to be a member of a swarm of diabase dikes of probable Ordovician age, and are located in the Grenville province of the Canadian Shield. The average chemical composition of diabase varies lout little from that of gabbro (q.v. endobj 0000003413 00000 n <> n. A dark-gray to black, fine-textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone. <> since the optics and composition of the feldspar and pyroxene in the diabase W-l are not available fiom the literaiure, calculation of the chemical composition from mineralogical data … 83 0 obj 0000018669 00000 n Dolerite and the synonym diabase are not root names but usually defined as medium grained mafic intrusive rocks. Diabase, also called Dolerite, fine- to medium-grained, dark gray to black intrusive igneous rock. 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Means and its composition being from 3.0-3.3 on Venus S.J, hot-spring fluids and composition of LUNAR MARE diabase AFRICA., characteristically composed of dark-colored amphibole ( esp Berndt, Michael E. ; Seewald Jeffrey..., Vol formed with the main parameters of the … Abstract must know exactly... 60-805S, quartz 30-4 ( ^, with minor chlorite and biotite to tectonics on Venus S.J astronauts the... Now diabases with a basaltic or spilitic chemical composition of pore water can vary based on method.