Mechanisms of magmatic mingling in composire dykes: Models of dispersion and shear dilatation

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This article is focused on the intrusion and formation of combined dykes. Two main groups of conventionally magmatic mingling are distinguished: (1) plutonic bodies, and (2) combined dykes. The first group is represented by small basite inclusions that are uniformly scattered in granitoid bodies, and includes elongated swarms and tails of small bodies. The second group includes composite dykes with the indicators of mechanical mingling of basic and acid melts. Despite the similarities in the structural and textural features and the indicators of mechanical mingling of melts, these two groups are characterized by clearly different proportions of the volumes of contrasting melts and differ in the duration of formation, place of melt mingling, and tectonic setting. None of the available models was able to explain the occurrence of magmatic mingling structures in individual dykes. In our study, the mingling mechanisms of contrasting melts are discussed using the data on the geological objects located in West Sangilen, an area of the Central Asian Orogenic Belt (CAOB). The general and specific parameters of combined dikes of the Saizyral and Tavyt-Dag sites are considered. The models of shear dilatation and dispersion are proposed for explaining the mechanisms of magmatic mingling in combined dykes.

Translated title of the contributionМеханизмы математического минглинга в композитных дайках: Модели диспергирования и сдвиговой дилатации
Original languageEnglish
Pages (from-to)325-345
Number of pages21
JournalGeodynamics and Tectonophysics
Volume10
Issue number2
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Combined dike
  • Mingling
  • Net‐veined intrusion
  • Sangilen
  • Shear zone
  • South‐East Tuva
  • Tectono‐magmatic evolution
  • GRANITIC MAGMAS
  • South-East Tuva
  • COMPLEX
  • FIELD
  • SANGILEN
  • shear zone
  • mingling
  • INTRUSION
  • MAFIC MICROGRANULAR ENCLAVES
  • SOUTH-EAST TUVA
  • ORIGIN
  • net-veined intrusion
  • combined dike
  • TRANSBAIKALIA
  • RUSSIA
  • tectono-magmatic evolution

OECD FOS+WOS

  • 1.05 EARTH AND RELATED ENVIRONMENTAL SCIENCES

State classification of scientific and technological information

  • 38 GEOLOGY

Fingerprint

Dive into the research topics of 'Mechanisms of magmatic mingling in composire dykes: Models of dispersion and shear dilatation'. Together they form a unique fingerprint.

Cite this