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porphyry    音标拼音: [p'ɔrfɚi]
n. 斑岩

斑岩

porphyry
n 1: any igneous rock with crystals embedded in a finer
groundmass of minerals [synonym: {porphyry}, {porphyritic
rock}]


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  • Porphyry (geology) - Wikipedia
    Porphyry ( ˈpɔːrfəri POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate -rich, generally aphanitic matrix or groundmass
  • What Is Porphyry? How Does It Form, and In Which Rocks?
    Porphyry is a term that describes extrusive or intrusive igneous rocks with large-grained crystals embedded in a finer-grain matrix
  • Porphyry Deposits - Geology Science
    Porphyry deposits are a type of mineral deposit that form from large-scale hydrothermal systems associated with intrusive igneous rocks They are characterized by the presence of porphyritic rocks that contain large crystals (phenocrysts) surrounded by a fine-grained matrix (groundmass) The mineralization in porphyry deposits is typically associated with hydrothermal fluids that circulate
  • Porphyry | geological feature | Britannica
    (A porphyry is an igneous rock containing conspicuous crystals, called phenocrysts, surrounded by a matrix of finer-grained minerals or glass or both ) In most rocks, both alkali and plagioclase feldspars occur as irregularly shaped grains with only a few or no crystal faces
  • PORPHYRY Definition Meaning - Merriam-Webster
    The meaning of PORPHYRY is a rock consisting of feldspar crystals embedded in a compact dark red or purple groundmass
  • Porphyry of Tyre - Wikipedia
    Porphyry ( ˈpɔːrfɪri ; Koine Greek: Πορφύριος, romanized: Porphýrios; c 234 – c 305) was a Phoenician [1][2] Neoplatonic philosopher born in Tyre, Roman Phoenicia [3] during Roman rule [a][3][4] He edited and published the Enneads, the only collection of the work of Plotinus, his teacher He wrote original works in the Greek language on a wide variety of topics, ranging
  • Porphyry (geology) - New World Encyclopedia
    Porphyry is a variety of igneous rock consisting of large-grained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic [1] matrix or groundmass The larger crystals are called phenocrysts In its traditional, non-geologic use, the term "porphyry" refers to the purple-red form of this stone, valued for its appearance Later, the name was generalized to igneous rocks
  • Uses and How Porphyritic Andesite Rock Form | Geology Base
    Andesite porphyry rocks have large crystals (phenocrysts) in a finer grained matrix (groundmass) Learn how they form and some of their uses
  • Porphyry and epithermal mineral deposits | U. S. Geological Survey
    Porphyry and epithermal mineral deposits form large economic ore bodies that provide the global economy with copper, molybdenum, gold, silver and other byproducts (Re, Te, Se) They form in the upper crust and are related to sulfur- and water-rich intermediate to silicic magmatic sources of hydrothermal fluids that move upward and produce extensive hydrolytic and alkali wall-rock alteration
  • What Is Porphyry Stone? Its Formation and Uses
    Porphyry is a type of igneous rock characterized by a distinctive porphyritic texture rather than a single mineral composition This volcanic stone forms when magma partially cools, resulting in a dual-sized crystal structure that provides a unique visual appearance and exceptional durability Historically, the term originated from a prized purple-red variety used by ancient royalty Today





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