The record of sea water chemistry evolution during the Ediacaran–Cambrian from early marine cements by Yi Xiong, Rachel Wood, Laetitia Pichevin

“…First, integrating the mineralogical data with published records, several shifts in dominant carbonate mineralogy are inferred: ‘dolomite‐aragonite seas’ in the late Ediacaran; ‘aragonite/high‐Mg calcite seas’ in Cambrian Stage 2; a temporary shift to a ‘calcite sea’ during early Cambrian Stage 3; an ‘aragonite sea’ between late Cambrian Stage 3 and late Cambrian Stage 4, then a gradual shift from mixed ‘aragonite–calcite seas’ during the middle and upper Cambrian towards a ‘calcite sea’ by the early Ordovician. Second, based on measured mMg/Ca in early marine cements, calculated sea water mMg/Ca at 15 and 35°C ranges from 1.2 to 0.8 in Cambrian Stage 2, 0.7–0.4 in Stage 3 and 1.4–0.9 in Stage 4 respectively. …”
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Mineralogy and metabasites formation conditions from ophiolite association at northern slope of Kuznetsk Alatau by N. A. Dugarova, P. A. Tishin, I. F. Gertner, T. S. Krasnova

“…The collision of Kuznetsk-Altai island arc to the structures of the Central Asia and Siberian Craton superterrane in Late Cambrian-Ordovician was controlled by vertical movement along submeridional tectonic discontinuities and resulted the metamorphism at low temperatures (350-510°C) and high pressure (6-9 kbar). …”
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Characteristics of tectonic deformation of the melange zone in the Lachlan Orogen along eastern coast of Australia by Dong-sheng Wang, Zong-qi Wang, Gang Wang, Xian-qing Guo, Yu-dong Wu

“…Based on the analysis of the characteristics of tectonic deformation in the NBB and summary of previous research results, it is determined that the early-stage (D1) deformation is related to Ordovician Macquarie arc-continent collision and the deformation at stages D2 and D3 is the result of the westward subduction of Paleo-Pacific Plate. …”
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Identification Method of Marine Shale Gas 'High-Quality Layer' in the Lower Paleozoic Area, Southern China and Its Application by GE Ming-na, REN Shou-mai, GUO Tian-xu, WANG Sheng-jian, ZHOU Zhi

“…OBJECTIVES To identify the 'high-quality layer' and optimize areas of marine shale gas with the commercial value in the Lower Paleozoic area of southern China. METHODS The Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation and Cambrian Niutitang Formation were the research objects. …”
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Discovery of Precambrian thick black mudstones and its implication for hydrocarbon exploration in the southwest Tarim Basin by Guangyou Zhu, Dedao Du, Weiyan Chen, Qisen Sun, Tingting Li, Zhiyao Zhang, Zhiyong Chen

“…Though some marine oil/gas fields such as Hetianhe, Bashituopu, Yubei and Luosi 2 have been discovered, the Cambrian or Ordovician source rocks have not been drilled, and hydrocarbon source still remain controversial. …”
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Progress in the study of carbonate clumped isotope in the thermal history of marine basins by Nansheng QIU, Xin LIU, Yujie XIONG, Yuchen LIU, Qiuchen XU, Qing CHANG

“…There is an abnormal high temperature of above 160 ℃ in the Ordovician strata of the Tarim Basin due to the Permian magmatic activity. …”
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Paleozoic convergence processes in the southwestern Central Asian Orogenic Belt: Insights from U–Pb dating of detrital zircons from West Junggar, northwestern China by Pan Zhang, Guocan Wang, Tianyi Shen, Ali Polat, Chengyu Zhu

“…In this study, we use detrital zircon U–Pb age data from Ordovician to Carboniferous sandstones in the southern and central West Junggar domains, complemented by literature data, to better constrain the tectonic evolution of the southwestern CAOB. …”
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Geochemical Characteristics and Organic Matter Accumulation of Wufeng-Longmaxi Shales in the Southeast of the Sichuan Basin of South China by Ying Zhang, Chengfu Lyu, Xue Gao, Zhaoqing Dang, Zhaotong Sun, Qianshan Zhou, Guojun Chen

“…The Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Formation black shales are the critical targets for shale gas exploration in the Sichuan Basin of South China. …”
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Paleozoic basin prototype evolution and source rock development in the South Yellow Sea by Weilin ZHU, Chunfeng CHEN, Bocheng ZHANG, Yanzhou WAN, Xiaowei FU, Yinguo ZHANG

“…Drill samples and outcrops confirmed that three sets of source rocks developed in the Lower Yangtze Block area, namely, the Lower Cambrian Mufushan Formation, the Upper Ordovician Wufeng Formation-the Lower Silurian Gaojiabian Formation, and the Permian. …”
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Mineral Filling Pattern in Complex Fracture System of Carbonate Reservoirs: Implications from Geochemical Modeling of Water-Rock Interaction by Jianwei Feng, Xu Zhang, Peng Luo, Xizhe Li, He Du

“…We conducted a geochemical simulation study using the outcrop fracture networks in Ordovician carbonate rocks in Tabei Outcrop Area of Tarim Basin. …”
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Cadomian metabasites of the Eastern Pyrenees revisited by Núria Pujol-Solà, Josep Maria Casas, Joaquín A. Proenza, Idael F. Blanco-Quintero, Elena Druguet, Montserrat Liesa, Manuel J. Román-Alpiste, J. Javier Álvaro

“…These variations are akin to island arc tholeiites generated in back-arc basins and to other metabasites described in the Eastern Pyrenees with a putative Ediacaran age, and they differ from the Ordovician tholeiitic metabasites from the Canigó massif, which derived from a contaminated E-MORB source. …”
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Cumulative deviation from moving mean precipitation as a proxy for groundwater level variation in Wisconsin by Robert A. Smail, Aaron H. Pruitt, Paul D. Mitchell, Jed B. Colquhoun

“…Well depth and casing in Cambrian/Ordovician formations were the only variables with a weak but statistically significant effect on correlation between the precipitation deviation and water level. …”
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Characterization of shale gas enrichment in the Wufeng Formation–Longmaxi Formation in the Sichuan Basin of China and evaluation of its geological construction–transformation evolu... by Zhiliang He, Zongquan Hu, Haikuan Nie, Shuangjian Li, Jin Xu

“…Shale gas in Upper Ordovician Wufeng Formation–Lower Silurian Longmaxi Formation in the Sichuan Basin is one of the key strata being explored and developed in China, where shale gas reservoirs have been found in Fuling, Weiyuan, Changning and Zhaotong. …”
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Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif by A.E. RAPALINI, M.G. LÓPEZ DE LUCHI, C. MARTÍNEZ DOPICO, F.G. LINCE KLINGER, M.E. GIMÉNEZ, PATRICIA MARTÍNEZ

“…Crustal continuity between the North Patagonian Massif and the Pampia and Arequipa- Antofalla terranes is suggested by similar Late Paleoproterozoic crustal model ages, comparable detrital zircon ages in Early Paleozoic successions, the apparent continuity of an Early Ordovician continental magmatic arc and paleomagnetic data. …”
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Nature and evolution of the lower crust under central Spain: Inferences from granulite xenoliths (Calatrava Volcanic Field-Spanish central system) by David Orejana, Carlos Villaseca, Marlina A. Elburg, Enrique Merino-Martínez, Javier García Serrano

“…The zircon U–Pb–Hf isotopic ratios support the idea that the lower crust in central Iberia consists mainly of Ordovician–Neoproterozoic metaigneous and metasedimentary rocks associated with the Cadomian continental arc of northern Gondwana. …”
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The atypical Gaoligong orocline: Its geodynamic origin and evolution by Yu-Ping Chiu, Meng-Wan Yeh, Tung-Yi Lee

“…The geometry of the Gaoligong orocline is controlled by the distribution of the Ordovician basement between the Tengchong and Baoshan blocks. …”
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Mapping bauxite-associated alterations in the Boke region (NW part of Republic of Guinea), using the airborne gamma-ray spectrometry data by Adama Sangaré, Ahmed Attou, Lahsen Achkouch, Younesse El cheikh, Ahmed Rachid, Abdelhalim Miftah, Daouda Diakité

“…Three zones of high mineral prospectivity have been identified, essentially the Ordovician formations at Pita, the Silurian at Telimele and the Devonian at Faro. …”
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Biostratigraphy versus isotope geochronology: Testing the Urals island arc model by Svetlana Tessalina, Cristina Talavera, Michael E. Pritchin, Victor Puchkov

“…Formation of the Urals volcanic-hosted massive sulphide (VHMS) deposits is considered to be related with the intra-oceanic stage of island arc(s) development in the Upper Ordovician–Middle Devonian based on the biostratigraphic record of ore-hosting sedimentary rocks. …”
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Geochemistry and geochronology of mafic rocks from the Spanish Central System: Constraints on the mantle evolution beneath central Spain by D. Orejana, C. Villaseca, M. Kristoffersen

“…The Spanish Central System (SCS) contains several suites of Palaeozoic mafic igneous intrusions with contrasting geochemical affinity: Ordovician tholeiitic metabasites, Variscan calc-alkaline gabbros (Gb1) and microdiorites (Gb2), shoshonitic monzogabbros (Gb3) and alkaline diabases and lamprophyres (Gb4). …”
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The Current State of Eunicida (Annelida) Systematics and Biodiversity by Joana Zanol, Luis F. Carrera-Parra, Tatiana Menchini Steiner, Antonia Cecilia Z. Amaral, Helena Wiklund, Ascensão Ravara, Nataliya Budaeva

“…The origin of Eunicida dates back to the late Cambrian, and the peaks of jaw morphology diversity and number of families are in the Ordovician. Species richness is heterogeneous among the seven recent families, with more than half of the valid species belonging to the Eunicidae + Onuphidae clade, one of the latest clades to diverge. …”
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