A light-coloured fine-grained acid igneous rock with a sugary texture, consisting of quartz and feldspars...。、。
Aplite is light in color and exhibits a granular texture, similar to that of sugar. The rock is generally found in small masses independent from other minerals. Aplite does, however, frequently occur with pegmatite, a similar rock that is more coarsely grained. The two igneous rocks may even form thin strata, or layers, within each other and ...
supplements such as aplite granite or pegmatitic granite. A similar scenario can be reported for syenitic and, less frequently, for granodioritic through dioritic rocks which are found
According to the chemical analysis (Table 2), aplite is rich in SiO 2 being equal to 87 wt%, while Al 2 O 3 is substantially lower reaching a level up to 6 wt%. CaO, K 2 O and Na 2 O are the main impurities in aplite. Mineralogical analysis (Fig. 1) of ground aplite confirms that crystalline quartz is the main host mineral of SiO 2 while the …
Synonymes de « aplite » apte; Citations contenant le mot « aplite » L'aplite, sœur discrète du granite, trace dans les entrailles de la Terre des réseaux finement ciselés, miroirs de l'ordre caché qui régit notre monde souterrain. Étienne de la Roche — Citation fictive générée à l'aide d'intelligence artificielle Comme un poème en filigrane sur la …
The Half Dome Granodiorite in Yosemite National Park, California, contains multiple crosscutting generations of high-silica dikes that vary in texture but share the distinctive trace element characteristics of fine-grained aplite dikes of the region (e.g., low Y and middle REE). Dikes of the youngest generation are typical fine-grained, sugary …
Also known as haplite, aplite is an intrusive igneous rock that chiefly consists of quartz and feldspars. Fine-grained and granitic, the material is sometimes utilized in the process of glassmaking. Aplite is …
Harald G. Dill studied (economic) geology, mineralogy and geography at Würzburg, Erlangen and Aachen universities. He was awarded a Diploma/M.Sc (geology), Dr. (mineralogy), Dr. habil. (applied geology/economic geology) and a Dr. honoris causa while he was appointed Assoc. Prof. and awarded honorary professor and professor …
c. Drill core through the external parts of the Hagendorf-North Pegmatite. For the position of the drill site see Fig. 1a. The DDH displays the transition from the Quaternary soil and solifluction zone through the saprolite and saprock into the unaltered pegmatite, which is represented by the aplite/aplite granite–pegmatite transition.
The Half Dome Granodiorite in Yosemite National Park, California, contains multiple crosscutting generations of high-silica dikes that vary in texture but share the distinctive trace element characteristics of fine-grained aplite dikes of the region (e.g., low Y and middle REE). Dikes of the youngest generation are typical fine-grained, sugary aplites …
Typical of the larger pegmatite-aplite dikes in the Pala district, the footwall zone of the Stewart dike consists of aplite and fine- to coarse-grained granite. However, unlike most other large dikes in the Pala district, the footwall zone lacks pronounced mineralogic layering, termed "line rock" (e.g., Jahns and Wright, 1951). The basal ...
Petrographic analysis reveals that the pegmatites and aplite primarily …
Feldspar intergrown with phosphates and columbite in the Reinhardsrieth tabular pegmatite. Lath-shaped columbite-(Fe) (col) in the phosphate-bearing aplite, replaced by apatite-(Mn) (ap).The central part of the BSE image is made up of K feldspar (kfs) and albite (alb) which are both surrounded by phosphates: eosphorite (eos), whitmoreite (whi), …
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Through available phase-equilibrium and kinetic studies from the literature, …
Such an association occurs in some aplite–pegmatite dykes of the Covas de Barroso district, northern Portugal. We describe their mutual relationships: where spodumene is an early magmatic phase, petalite precipitates directly from a late orthomagmatic fluid, the spodumene remaining metastably, whereas eucryptite is …
Aplite is a medium- to fine-grained rock (average grain size usually 1.0 mm or less) with …
A chemical similarity exists between granite, aplite, and granite porphyroblasts. Field studies, microscopic examinations, and chemical data suggest that the aplite-pegmatite association developed in two stages by metamorphic and metasomatic processes. (1) Under shearing and crushing, the granite recrystallized into banded aplites containing ...
The greater abundance of garnet in the pegmatite and aplite (and its larger crystal-size in the former) relate to the enhanced presence of a hydrous fluid within the magma. The tendency for garnet crystals to concentrate in bands is much more developed in the pegmatite than in the granite, and is associated with the effects of hydrofracturing ...
aplite, any intrusive igneous rock of simple composition, such as granite composed only of alkali feldspar, muscovite mica, and quartz; in a more restricted sense, uniformly fine-grained (less than 2 millimetres [0.08 inch]), light-coloured, intrusive igneous rocks that have a characteristic granular texture. Unlike pegmatite, which is similar but coarser grained, …
The aplite is fine grained and white in color (Fig. 3e). The main phenocryst minerals are quartz, Feldspars. The K-feldspars and albites in the Yifeng granites are close to pure end-member compositions (Table 2) with the K-feldspars containing 2.2 mol% albite on average, and the albites containing just 0.45 mol% anorthite. The aplites contain ...
Predicted geochemical effects of aplite redistribution are evident in trace-element geochemical patterns of Circum-Pacific plutonic rocks but are absent from corresponding volcanic rocks. This indicates that aplite infiltration may be an important and widespread late-stage process of pluton differentiation. Date of publication. 2020; Keyword ...
OED's earliest evidence for aplite is from 1862, in the writing of J. Beete Jukes, geologist. aplite is a borrowing from Greek, combined with an English element; modelled on a German lexical item. Etymons: Greek ἁπλοῦς, ‑ite suffix 1 .
When did you first come across the property that would become home to the Aplite House? For many years my friends and I have been visiting the east coast of Tasmania for camping and exploring. Around the late 90's I was camping frequently in the Freycinet National Park near Blue Stone Bay, as this area is a great spot for Rock Climbing and ...
The Nanling Range in southern China is well known for its hosted metallogenic districts. Granite bodies of Yanshanian (Jurassic – Cretaceous) age make up ~30% of the exposed area (i.e., >64 × 10 3 km 2; Zhou et al., 2006) and they are commonly associated with extensive Sn–W–Nb–Ta mineralization (Hua et al., 2003, Xu and Zhu, …
Sina Y., Aplite founder, presented a talk on DICOM security at last year's BlackHat EU.The landscape of healthcare data security is evolving rapidly, with an increasing number of DICOM servers ...
Aplite. Photos are copyright free for non-commercial educational uses. Just credit photos to R.Weller/Cochise College. Photos. Aplite With Sugary Texture. Next. MISSION STATEMENT. Cochise College provides inclusive and accessible educational opportunities that support social responsibility, community engagement, meaningful careers, and …
Two principal types of aplite-pegmatite dykes and sills intruded the granite G1: (i) aplite-pegmatites of the beryl-columbite subtype (rare-element class) that form larger irregular bodies, and (ii) lepidolite subtype pegmatites (LCT complex type, Černý and Ercit, 2005) that form numerous tabular bodies (Fig. 1 c, Table 1).The relatively less evolved …
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Pegmatites of the Pala and Mesa Grande Pegmatite Districts, San Diego County, California are typically thin, sheet-like composite pegmatite-aplite dikes. Aplitic portions of many dikes display pronounced mineralogical layering referred to as "line rock," characterized by fine-grained, garnet-rich bands alternating with albite- and quartz-rich ...
A light-coloured, fine-grained, equigranular igneous rock composed of subhedral to anhedral grains of quartz and alkali feldspar, and found as late-stage veins in granite bodies. The quartz–alkali feldspar composition corresponds to the lowest temperature melts in granite magma systems, suggesting that they are residual melts formed by the …
