Lamprophyre - Wikipedia
网页Lamprophyres (from Ancient Greek λαμπρός (lamprós) 'bright' and φύρω (phúrō) 'to mix') are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions.
Lamprophyre | Igneous, Mafic & Ultramafic | Britannica
网页lamprophyre, any of a group of dark gray to black intrusive igneous rocks that generally occur as dikes (tabular bodies inserted in fissures). Such rocks are characterized by a porphyritic texture in which large crystals (phenocrysts) of dark, iron-magnesium (mafic) minerals are enclosed in a fine-grained to dense matrix (groundmass).
Lamprophyre | Properties, Composition and Formation - Geology …
网页2019年5月11日 · Lamprophyre is ultrapotassic igneous rock that is occurring as dikes, lopoliths, loccoliths, stocks and small intrussion. It is alkaline silica-undersaturated mafic or ultramafic rocks with high magnesium oxide, >3% potassium oxide, high sodium oxide and high nickel and chromium.
Lamprophyres - ALEX STREKEISEN
网页Lamprophyres are a diverse group of polygenetic rocks united by the common trait of crystallization under volatile-rich conditions. Because of the diverse mineral assemblages which may crystallize from these magmas, it is not possible to devise a succinct and short definition of the term.
煌斑岩 - 百度百科
网页煌斑岩（lamprophyre）是富含自形的镁铁质矿物斑晶（主要是黑云母和角闪石）的超基性-中性浅成岩。 其组成成分多为长石和与斑晶相同的暗色矿物，尤其是云母。
网页The term 'lamprophyre' was coined by GUmbel (1874), making it one of petrography's oldest; in fact it predates such fashionable wunderkinden as komatiite and ophiolite by a full century. The name derives from the Greek lampros porphyros (A,CXp,1tpocr 1tOP1t'l1'1'pocr)
Lamprophyres – Geology is the Way
网页Lamprophyres (from the Greek lampros, ‘glistening’ + porphyros ‘porphyry’) are rare and poorly understood ultrapotassic hypabissal rocks that occur only as dikes. Even though they share similarities with some kimberlites and lamproites, they cannot be separated easily from other plutonic rocks using the QAPF diagram or the TAS classification.
Lamprophyre - an overview | ScienceDirect Topics
网页Lamprophyre is defined as a type of porphyritic dyke rock characterized by phenocrysts of solely mafic minerals, such as biotite or amphibole, with feldspars and/or feldspathoids limited to the groundmass.
What are Lamprophyres? — History, Definitions, Classification
网页Abstract. To an uncomfortably large number of geologists, the term ‘lamprophyre’ conjures up predominantly negative images: of rotten dykes forming miniscule, impersistent outcrops; of legion obscure rock-types named after equally obscure European villages.
Lamprophyre - SpringerLink
网页Lamprophyre. Part of the book series: Encyclopedia of Earth Science ( (EESS)) Dark, lustrous rocks with mafic phenocrysts occurring in the Fichelgebirge, W Germany, were called lamprophyre (shining porphyries) by C. W. von Gümbel. A few pre-existing names, some still in use, were incorporated by him in the new term.
- 某些结果已被删除
跳至内容