Zeolites are crystalline hydrated tektoalumosilicates consisting of a three-dimensional framework of SiO4 4and AlO4 5tetrahedra linked through shared oxygen atoms. The heulandite group of zeolites including clinoptilolite are the most abundant zeolites in nature 1, 2 . Clinoptilolite is used in a wide range of industrial and agricultural applications, particularly in animal nutrition. Dietary i...

More sustainable and environmentally friendly concretes are essential to reduce the climatic environmental impact of growing demand for concrete fuel urban sprawl. This manuscript reports on an experimental study designed test fire resistance one such concrete, prepared contain natural zeolite-bearing tuff. The containing zeolites has received little attention is therefore poorly understood. Re...

The Tsushima Lapilli Tuff, the thickest tuff in Taishu Group on Island, underwent a thermal event after deposition, and has not previously yielded reliable age because various ages have been reported. This study clarifies eruption history of Tuff based fission-track (FT) U–Pb dating zircon grains using laser ablation inductively coupled plasma mass spectrometry (ICP-LA-MS) evaluates submarine v...

To determine the metamorphic ages of accretionary complexes in Northern Chichibu Belt SW Japan, K–Ar dating was conducted using weakly metamorphosed sedimentary rocks collected from Kanto Mountains, Central Japan. Whole-rock were obtained for chert and red shale samples, mineral fine-grained illite with a grain size less than 4 μm chert, shale, mudstone, acidic tuff, basic tuff. The presented l...

Introduction: The National Research Council Decadal Study on Terrestrial Analogs to Mars recommended the Bishop Tuff, exposed in the Volcanic Tableland, Bishop, California (Fig. 1), as an analog [1] because some Martian volcanoes and the Stealth region of southwestern Tharsis are thought to be composed of pyroclastic deposits [2–4]. Recent data from the Spirit rover also suggest that the Columb...

Terahertz (THz) time-domain spectroscopy probes the optical properties of naturally occurring solid aggregates of minerals, or stones, in the THz frequency range. Refractive index and extinction coefficient measurement reveals that most natural stones, including mudstone, sandstone, granite, tuff, gneiss, diorite, slate, marble, and dolomite, are fairly transparent for THz frequency waves. Dolo...