The metamorphic evolution of granulitized eclogites recently discovered in the Eastern Himalaya compared to that of the eclogites of the Northwestern Himalaya (upper Kaghan Nappe and Tso Morari Dome) suggests the possibility of a Himalaya-wide eclogitic metamorphism of Early Tertiary age. Eclogites ...
The basement comprises the Paleoproterozoic Wenquan Group and Mesoproterozoic Jixian Group, which have undergone greenschist- and amphibolite-facies metamorphism. The Paleozoic cover strata, located in the Sailimu, Boluokeluo, Awulale, and Alatao areas, consist of Cambrian–Ordovician sedimentary sequence...
constituents of clinopyroxene, plagioclase, olivine, ilmenite, and rare troilite and cristobalite (Fig.1). The euhedral-to-subhedral phosphate minerals apatite and merrillite are found in all types of basalt clast (Fig.1, Extended Data Figs.1,2, Supplementary Table1) and commonly occur along th...
These characteristics indicate that the initial magma originated from the metamorphic subduction ocean\\|crust that had been intensively contaminated by crustal materials, and retrogressive metamorphism is characterized by low\\|degree partial melting during back\\|arc spreading. Varying degrees of partial...
Further because such zircon ages are similar with the emplacement time of the Emeishan large igneous province in western South China, they likely reflect the timing of metamorphism for the included fragments of granulitic crusts that had been formed by invasion of the Emeishan plume. The younger ...
A total of 27 gold orebodies are identified within the Tanjianshan deposit. Ten of these trend NNE and are concentrated in the hinge zones of the east fold and along the parallel fault zones on the limbs of the east and west folds, forming the main gold mineralization zone of the deposit...
Therefore, the stage-2 alteration/mineralization in Hutti may be due to a second pulse of metamorphic fluid. Such a reduced low salinity fluid may be released during metamorphic devolatilization in deeper parts of the greenstone belt, which were still prograde or in their peak metamorphism, while...
evidence of the use of Gualba marble during Roman and Medieval times. Keywords: marble;provenance studies;supervised methods;machine learning;clustering;XRF;heritage science 1. Introduction Provenance studies of stone materials are one of the main applications among the wide range of disciplines covered...
Undoubtedly, burial, metamorphism, intrusion, and underplating have substantially modified the area with the flysch and Eocene intrusions contributing to the high attenuation. There is a slight low-velocity anomaly in the Pg phase velocity there, but it is not larger than that caused by the Zagros...