Carbonates from the impact melt-bearing breccia in 2016 IODP/ICDP Expedition 364 drill core at Site M0077 were systematically documented and characterized petrographically geochemically. Calcite, only carbonate mineral present, is abundant throughout this deposit as five distinct varieties: (1) subangular clasts (Type A); (2) subround/irregular with clay altered rims B); (3) fine-crystalline ma...

Estimates of temperatures, past and present, in geothermal reservoirs can be made by using now standard mineralogical techniques, including fluid inclusion geothermometry, vitrinite reflectance, calc-silicate and clay occurrence, the extent of clay interlayering, and measuring clay crystallinity. Recent studies of clays in 60 drillcores from 6 wells at Wairakei, for example, show an inverse rel...

[1] A kilometers‐thick sedimentary sequence in Gale Crater exhibits stratigraphic changes in lithology that are consistent with transitions in aqueous and climatic conditions purported to be global in scale. The sequence is divided into two formations, where the Lower formation exhibits a net transition in mineralogy from clay/sulfate to sulfate/oxide assemblages and is separated from the overl...

This paper discusses the content, distribution, modes of occurrence, and enrichment mechanism of mineral matter and trace elements of an Early Permian coal from Songshao (Yunnan Province, China) by means of coal-petrological, mineralogical, and geochemical techniques. The results show that the Songshao coal is characterized by high total and organic sulfur contents (3.61% and 3.87%, respectivel...

High levels of naturally occurring and carcinogenic radium isotopes have been measured in low-saline and oxic groundwater from the Rum Group of the Disi sandstone aquifer in Jordan. The combined 228Ra and 226Ra activities are up to 2000% higher than international drinking water standards. Analyses of the host sandstone aquifer rocks show 228Ra and 226Ra activities and ratios that are consistent...

A new six-channel aircraft multispectral scanner has been developed to exploit mineral signature information at wavelengths between 8 and 12 micrometers. Preliminary results show that igneous rock units can be identified from their free silica content, and that carbonate as well as clay-bearing units are readily separable on the digitally processed images.

The Chinese Loess Plateau (CLP) is the largest loess deposit on Earth with expansive surface-exposed source rocks of varying origins, ages, and history. Here, we present abundances elements representative palaeosol samples from seven classic sections CLP. Most elements, including soluble (e.g. Rb Cs), show significant correlations La or Al2O3. These indicate that these are hosted absorbed in pa...

This study reconstructs the depositional conditions of ironstones within Chulym-Yenisey basin and assesses iron source. The detrital minerals studied deposits include quartz feldspar. authigenic are goethite, siderite, aragonite, dolomite, calcite, apatite, barite, pyrite. clay components chlorite group (possible chamosite), nontronite, kaolinite, illite, beidellite. Local bacterial sulfate red...