TY - JOUR

T1 - Mechanisms of magmatic mingling in composire dykes: Models of dispersion and shear dilatation

AU - Vladimirov, Vladimir G.

AU - Yakovlev, Vladislav A.

AU - Karmysheva, Irina V.

N1 - Владимиров В.Г., Яковлев В.А., Кармышева И.В. Механизмы математического минглинга в композитных дайках: модели диспергирования и сдвиговой дилатации // Геодинамика и тектонофизика. - 2019. - Т. 10. - № 2. - С. 325-345.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

KW - Combined dike

KW - Mingling

KW - Net‐veined intrusion

KW - Sangilen

KW - Shear zone

KW - South‐East Tuva

KW - Tectono‐magmatic evolution

KW - GRANITIC MAGMAS

KW - South-East Tuva

KW - COMPLEX

KW - FIELD

KW - SANGILEN

KW - shear zone

KW - mingling

KW - INTRUSION

KW - MAFIC MICROGRANULAR ENCLAVES

KW - SOUTH-EAST TUVA

KW - ORIGIN

KW - net-veined intrusion

KW - combined dike

KW - TRANSBAIKALIA

KW - RUSSIA

KW - tectono-magmatic evolution

UR - http://www.scopus.com/inward/record.url?scp=85076622209&partnerID=8YFLogxK

U2 - 10.5800/GT-2019-10-2-0417

DO - 10.5800/GT-2019-10-2-0417

M3 - Article

AN - SCOPUS:85076622209

VL - 10

SP - 325

EP - 345

JO - Geodynamics and Tectonophysics

JF - Geodynamics and Tectonophysics

SN - 2078-502X

IS - 2

ER -