In the deep mining, the disaster dynamic of coal petrology and gas becomes increasingly serious, dynamic coupling of coal gas disaster grows in number. However the traditional method of predicting is limited. In order to evaluate the dynamic disaster hazard level of the coal face in the deep mine, a fuzzy hierarchy comprehensive evaluation model of the coal petrology dynamic disaster on the coa...

Petrology and geochemical characteristics of granitic rocks from South Sulawesi, especially from Polewaliand Masamba area are presented in order to elucidate their origin of magma and geodynamic setting. The granitic rocks in these areas are dominated by granodiorite and granite in composition. Quartz, K-feldspar and plagioclase occur as major phases with hornblende and biotite as major ferroma...

The natural chemical and physical variations that occur within volcanic rocks (petrology) provide critical insights into mantle crust conditions on terrestrial bodies. Visible/near-infrared (VNIR; 0.3–2.5 ?m) thermal infrared (TIR; 5–50 spectroscopy are the main tools available to remotely characterize these materials from satellites in orbit. However, accuracy of petrologic information can be ...

The effectiveness of classroom-based active learning environments in transferring their benefits outside the classroom remains nebulous. We present exploratory results of students’ perceptions of a synergic integration of Gallery Walks (an active learning strategy) with a course Wiki (a collaborative Web 2.0 tool). This integration was designed to extend the benefits of active learning beyond t...

A novel sedimentary transformation product of chlorophyll, purpurin-7 phytyl ester, has been identi®ed by atmospheric pressure chemical ionisation liquid chromatography mass-spectrometry in sediments from Lake Baikal, Russia, Loch Ness and Priest Pot, UK. This product of oxidative transformation is an intermediate on the transformation pathway leading to sedimentary aetioporphyrins and its occu...

An appealing strategy for reconstructing the timing and tempo of paleoenvironmental change from sedimentary strata is to linearly interpolate between marker beds known age. This method requires significant assumptions, but more advanced age modeling methods are usually not feasible. We used experiments explore how changes in processes invalidate these assumptions affect estimates time strata. W...