نتایج جستجو برای: organic petrography
تعداد نتایج: 203272 فیلتر نتایج به سال:
The middle Sarvak formation (Cenomanian) is one of the stratigraphic units of the Bangestan group in the south of Iran. This formation is stratigraphically equivalent to the Ahmadi member of Kuwait and Iraq. There is geochemical evidence that indicates this unit has a high level of organic richness and can be a possible source rock in various locations. This study focuses on the organic geochem...
Many aspects of Earth's early sulfur cycle, from the origin of mass-anomalous fractionations to the degree of biological participation, remain poorly understood--in part due to complications from postdepositional diagenetic and metamorphic processes. Using a combination of scanning high-resolution magnetic superconducting quantum interference device (SQUID) microscopy and secondary ion mass spe...
Introduction: We have recently characterized the mineralogy and petrography of ~ 100 CAIs from ~20 R chondrites [1]. Here we report O-isotope compositions of ten R CAIs and Mg-isotope composition of three hibonite-bearing CAIs: H030
Abstract Primary fluid inclusions in bedded halite from the 830-m.y.-old Browne Formation of central Australia contain organic solids and liquids, as documented with transmitted light ultraviolet–visible (UV-vis) petrography. These objects are consistent size, shape, fluorescent response cells prokaryotes eukaryotes compounds. This discovery shows that microorganisms saline depositional environ...
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