Detrital chromian spinels in Devonian-Carboniferous sandstones of Hikoroichi area,NE Japan : their provenance and tectonic relationship

A total of 30 sandstones were collected from the well-defined mappable units of Middle Devonian to Early Carboniferous ages in the South Kitakami Terrane(=SKT) NE Japan, They are classified as litharenite, feldspathic litharenite,and lithic arkose. QFL discimination diagram of the studied sandstones indicates the provenance of magniatic arcs, Detrital chromian spinels, present as accessory minerals in the rocks, are discovered from 6 clastic samples, A total of 37 detrital chromian spinels are detemined for their major-oxide analysis using EPMA,Fe-Cr-Al diagram displays rather low Fe 3+ values suggesting the provenance from ultramafic regions. The result also indicates that most chromian spinels have wider ranges of Cr/(Cr+Al). The rather low values of TiO,contents suggest that the sandstone-hosted spinels were derived from ultramafic provenance. These lines of evidence support the idea that spinel-bearing sandstones were derived from ultramafic sources occurring in the fore-are leclonic setting of the northern peri-Gondwana Land

Archaeoseismology of the AD 1545 earthquake in Chiang Mai, Northern Thailand

The A.D. 1545 Chiang Mai earthquake in northern Thailand was studied by historical and archaeological sources.The temple Wat Chedi Luang has lost about half of the original 80-metres height due to southward-directed collapse. Twenty-one temple sites – out of 74 visited – has tilted pagodas, up to 5° in various directions, dominated by a SE trend. All damaged temples were built before the 1545 earthquake. We suggest that a city-wide liquefaction event caused tilting. The responsible earthquake possibly occurred along the Doi Suthep Fault within city limits. Possible activity of distant faults is assessed

Recent Paleoseismic Investigations in Northern and Western Thailand

Recent paleoseismic investigations have identified a number of active faults in Northern and Western Thailand. Northern Thailand is an intraplate basin and range province, comprised of north-south-trending Cenozoic intermontane grabens and half grabens, bounded by north- to northwest-striking normal to normal-oblique faults and northeast-striking left-lateral strike-slip faults. The basin-bounding normal faults are marked by steep, linear range fronts with triangular facets and wineglass canyons and have slip rates of 0.1 to 0.8 mm/yr. Based on limited data, the average vertical displacement-per-event is about 1.0 to 1.5 m. These faults are characterized by recurrence intervals of thousands to tens of thousands of years and are capable of generating earthquakes up to moment magnitude (M) 7, and larger. The northeast-striking strike-slip faults are marked by shutter ridges, and deflected drainages. Slip rates are 3 mm/yr or less. Western Thailand is dissected by a number of northwest- and north-northwest-striking, right-lateral strike-slip faults related to the Sagaing Fault in Myanmar. Although showing much less activity than the faults in neighboring Myanmar, these faults display abundant evidence for late Quaternary movement, including shutter ridges, sag ponds, and laterally offset streams. The slip rate on these faults is estimated to be 0.5 to 2.0 mm/yr. These faults are considered capable of generating maximum earthquakes of up to M 71/2

Product Infographic Labeling on Food Packaging

岩手大学博士（芸術工学）doctoral thesi

Possibility of Implementing the Usage of Plants as Colouring Agents for Hard Element

The use of plants in the creative industry is practically done by extracting natural colours from selected materials and applying them to the object that needs colourisation through boiling, tinting, and soaking. This method is effectively used for soft material, not hard surface material. For this reason, the research aimed to utilise the raw property of flowers, leaves, and fruits as a colouring ingredient, benefiting the creative industry through hard surface colouring methods. The research is expected to deliver an effective colouring process using a natural hard surface colouring method

Sulfur Strontium Carbon and Oxygen Isotopes of Calcium Sulfate Deposits in Late Carboniferous Rocks of the Loei-Wang Saphung (LWS) Area Loei Province Thailand

journal articl

New Insights Into the Paleoseismic History of the Mae Hong Son Fault, Northern Thailand

The Mae Hong Son Fault (MHSF) is a north-trending active fault in northern Thailand. The largest earthquake ever recorded in Thailand occurred in February 1975 with a magnitude of 5.6 and was associated with the southern end of the MHSF. Paleoearthquake magnitudes, recurrence intervals, and slip rates for the MHSF are evaluated using the morphological characteristics of the MHSF aided with a 12.5-m-resolution digital elevation model (DEM) and using fault trenching. Morphotectonic analysis, including studies of offset streams, linear valleys, triangular facets, and fault scarps, helps illustrate dextral fault movements within the MHSF zone. Two separated N–S trending basins, the Mae Hong Son to the north and the Mae Sariang to the south, are present along the MHSF. Between these basins, fault displacements decrease toward the Khun Yuam area. Surface rupture length investigation from fault segments in both basins indicates maximum credible earthquake magnitudes between 5.8 and 6.3. Fault trenching and road-cut studies show that nine earthquakes occurred along the MHSF over the past ∼43 ka. Optically stimulated luminescence (OSL) dating help define the timing of the earthquakes to ∼43, ∼38, ∼33, ∼28, ∼23, ∼18, ∼13, ∼8, and ∼3 ka. The recurrence interval of earthquakes on the Mae Hong Son Fault is ∼5,000 years and the fault has a slip rate of ∼0.04–0.15 mm/a