Petrology and hydrocarbon potential of microalgal and macroalgal dominated oil shales from the Eocene Huadian Formation, NE China

Organic geochemistry and petrology of Lower Cretaceous black shales in the Qiangtang Basin, Tibet: Implications for hydrocarbon potential

“…This suggests that the black shales were deposited in a transitional tidal flat-lagoon environment and contain type II-III kerogen. The kerogen type is generally consistent with those kerogens composed dominantly of macroalgae in the study of Xie et al (2014) and the geological setting of the study area. In addition, benthic organisms are abundant in this environment, including bivalves, gastropods, echinoderms, foraminifera and bryozoans.…”

“…5), suggesting that the black shales are mainly gas-prone. The dominant organic macerals of macroalgae are similar to those of higher plants in chemical structure and composition and thus indicative of type III kerogen (Xie et al, 2014), even though higher plants are not dominant in the macerals. Combined with the bacteria and amorphous OM of algal-bacterial origins which have more oil-prone kerogen types (Xie et al, 2014), the kerogen of the Shengli River black shales is characterized as type II-III.…”

Flash pyrolysis of kerogens from algal rich oil shales from the Eocene Huadian Formation, NE China

“…Microalgae are the major source of organic matter in the organic rich Huadian oil shales (Xie et al, 2014) as found in many marine and lacustrine sediments (Volkman et al, 1998). Microalgae contain a variety of distinctive biomarkers (e.g.…”

Mineralogy and geochemistry of fine-grained clastic rocks in the Eocene Huadian Basin (NE China): Implications for sediment provenance, paleoclimate and depositional environment

“…The position of Formation was deposited under subtropical conditions.________________________________________ presence of rhodophyta, described by Xie et al (2014), even raises the possibility that deposition of some oil shale layers was influenced by marine flooding. (Anderson et al, 1989;Arthur et al, 1994;Morford and Emerson, 1999).…”

“…The extensive, high quality oil shale and coal deposits in the Eocene Huadian Formation have long been in the focus of geological research. However, previous work has largely concentrated on sequence stratigraphy and sedimentary environment Sun et al, 2011;Meng et al, 2016), fossil plants (Zhou and Sun, 1985;Manchester et al, 2005), lake paleoproductivity and organic matter accumulation (Meng et al, , 2012Sun et al, 2013;Xie et al, 2014;Zhang et al, 2014;Strobl et al, 2015;Volkman et al, 2015), and industrial utilizations Jiang et al, 2015;Ren et al, 2015;Sun et al, 2015) of oil shale and coal. In contrast, only few studies reported on the provenance of the sedimentary material and paleoclimatic and environmental changes.…”