Mineral chemistry of high-Mg diorites and skarn in the Han-Xing …
2015年1月1日 · We chose two crystals in two different thin sections for detailed analysis. One is from diorite porphyrite (CY-1), the other is from diorite (FD-1). The plagioclase phenocrysts of diorite porphyrite are composed of two oscillatory zoned domains around a core, and an outer rim.
Detailed Microscopic Analysis of Diorite Thin Sections
2024年8月31日 · Analyzing the texture of diorite thin sections helps geologists infer the tectonic settings and magmatic processes involved in the rock’s formation. For example, interlocking and porphyritic textures may suggest tectonic stability during formation, while ophitic textures could indicate dynamic magmatic environments.
克拉通破坏型金矿成矿机制:吉南板庙子金矿床闪长玢岩与重晶石流 …
2020年8月15日 · This paper reports the petrographic, geochronological and geochemical study of the diorite porphyrite exposed in the Banmiaozi gold deposit, Ji'nan district, the northeastern NCC, and fluid inclusions and the H-O-S isotopic composition analysis of the barite in …
Petrogenesis and metallogenic implications of Silurian dolerite and ...
2024年11月27日 · Ninety-one in-situ EPMA analyses were conducted on thin sections of 10 dolerite samples, and the results are provided in Supplementary Table S4. Consistent with the petrographic observations, no orthopyroxene was detected.
Cumulate hornblendite enclaves in diorite–porphyrite intrusions …
2009年12月10日 · In this paper, we report a suite of hornblendite enclaves collected from a diorite–porphyrite stock intruding the Lower Cretaceous coal-bearing strata in eastern Heilongjiang Province, Northeast China, suggest that they were accumulated from hydrous basaltic magma underplated at the CMTZ, and conclude that cumulate hornblendite, as an ...
西大别大悟地区闪长玢岩岩石地球化学特征及其构造意义
2021年6月20日 · It is suggested that porphyrite may have been influenced by fluid metasomatism of subducted plates during the formation process. The field outcrops show that diorite porphyrite dikes intrude into granitic porphyry dikes (forming age is 130.8±1.8 Ma), so the emplacement time of dikes may be early Cretaceous.
Representative field structures and thin section photomicrograph …
(a) black shales in the outcrop; (b) the contact zone of black shale and diorite porphyry intrusion; (c) the diorite porphyry intrusion show the spheroidal weathering appearance in the outcrop;...
内蒙古北山地区中基性岩脉年代学和地球化学特征:对塔里木板块北 …
2023年7月20日 · In this study, a series of gold ore-related diabase dike and altered diorite porphyrite dike samples were collected from the Laodonggou ore section II, on which we conducted LA-ICP-MS zircon U-Pb dating, Hf isotope and whole-rock geochemical analyses.
Granite and diorite petrographic thin section images
Download scientific diagram | Granite and diorite petrographic thin section images from publication: Rock Classification in Petrographic Thin Section Images Based on Concatenated Convolutional ...
71840 Quartz diorite - Virtual Microscope
This collection of virtual thin sections is the result of a collaboration between earth scientists at Leicester University and The Open University. The collection consists of 135 slides from the Leicester teaching collection, including igneous, metamorphic and sedimentary rocks.