The Permian igneous rocks in the Sichuan Basin represent a major breakthrough, opening up new prospect for oil and gas exploration, reservoirs have become field of exploration. Gravity-magnetic-electric exploration is an effective means identifying helps reducing multiplicity prediction results. However, lithology quite different, theory evaluation techniques need urgently to be improved. In or...

Abstract Geomagnetic data from field camp surveys in Karangsambung 2005-2019 were collected and merged. Before 2020 (the restriction of Covid-19 pandemic), there are 4713 5984 base observation the study area. The purpose works this paper presenting collection, simple processing, calculation inverse modeling. Fifteen each year acquisition merged with 2017 survey as reference. proton magnetometer...

The Open University's repository of research publications and other research outputs Halite and stable chlorine isotopes in the Zag H3-6 breccia Journal Article

Introduction: Crystallization ages of lunar impact melt rocks provide the primary evidence for a spike in the impact flux at ~3.9 Ga. Here we report U-Pb isotopic ages of accessory phases (apatite, zirconalite) in lunar melt breccia 67955 that confirm a crystallization age of ~4.2 Ga and reveal a younger overprint possibly related to entrainment of the breccia by one or more younger basins such...

Introduction: The Chesapeake Bay impact structure, 35 Myr old and 85 km in diameter, is one of the largest and best preserved impact structures on Earth [1]. The structure was drilled in the central part at Eyreville in 2005-2006 during an ICDP-USGS drilling project. Three drill cores (Eyreville A, B, and C), intersecting the impact structure to a total depth of 1766 m, were recovered within th...

Using some new processing of the multichannel sonic (MCS) log data from Site 418A, the resulting P, S, and Stoneley wave velocity estimates and apparent attenuation were integrated with the natural gamma, spectral gamma, resistivity, neutron, density, and caliper logs and core lithology information for interpretation of lithologic cycles and possible paleo fluid flow intervals. These data indic...

This paper presents experiences with design and construction process of the Tanju Tunnel, West Nusa Tenggara. The objective this research was to characterize volcanic intrusive rock masses for designs tunnel excavation method support system. Engineering geological investigations were carried out, upon which stand-up time estimated system determined based on mass classifications RMR (Bieniawski,...

Sharply defined veins in :stockworks and siliceous breccia matrix contain metallic mineral assembhges and follow a number of subparallel trends within and marginal to a ] p tassium-feldspar porphyritic dacite. The .porphyritic dacite and metal-bearing veins and breccias exhibit both con-. formable and crosscutting relationships with andesite and dacite country rocks of the Hazelton Group. Vein ...