The East Coast of Canada presents multiple passive continental margin basins(PCMBs)characterized by significant architectural differences and limited oil and gas discoveries,establishing these basins as the global fro...The East Coast of Canada presents multiple passive continental margin basins(PCMBs)characterized by significant architectural differences and limited oil and gas discoveries,establishing these basins as the global frontier for hydrocarbon exploration.Limited understanding of the characteristics of basin ar-chitectures and their control of hydrocarbon accumulation hinders exploration breakthroughs in these basins.Using magnetic anomaly,seismic,and drilling data,this study conducts integrated geological and geophysical interpretations of the PCMBs.Accordingly,this study reveals that the PCMBs have undergone three evolutionary stages,namely rifting(comprising three episodes),depression,and continental margin,with the synthem of each stage being referred to as rift layer,depression layer,and continental margin layer,respectively.Under the control of transform faults and basement nature,four distinct types of PCMBs have formed:transtensional,transform,gentle-rampy,and volcanic rifted types from south to north.The basins with varying architectures govern the sedimentary filling,the combination of petro-leum system elements,and differential hydrocarbon accumulation across three major types of synthems.Furthermore,this study highlights substantial hydrocarbon exploration potentials in the turbidite sandstones within the slope and basin-floor areas of the transtensional and transform types of PCMBs,as well as in the deltaic sandstones within the rift and depression layers of the gentle-rampy type of PCMBs.展开更多
Water stress-induced ABA accumulation is a cellular signaling process from water stress perception to activation of genes encoding key enzymes of ABA biosynthesis, of which the water stress-signal perception by cells ...Water stress-induced ABA accumulation is a cellular signaling process from water stress perception to activation of genes encoding key enzymes of ABA biosynthesis, of which the water stress-signal perception by cells or triggering mechanism of the ABA accumulation is the center in the whole process of ABA related-stress signaling in plants. The cell biological mechanism for triggering of ABA accumulation under water stress was studied in leaves of Vicia faba. Mannitol at 890 mmol· kg-1 osmotic concentration induced an increase of more than 5 times in ABA concentra-tion in detached leaf tissues, but the same concentration of mannitol only induced an increase of less than 40 % in ABA concentration in protoplasts. Like in detached leaf tissues, ABA concentra-tion in isolated cells increased more than 10 times under the treatment of mannitol at 890 mmol·kg-1 concentration, suggesting that the interaction between plasmalemma and cell wall was essential to triggering of the water stress-induced ABA accumulation. Neither Ca2+-che- lating agent EGTA nor Ca2+ channel activator A23187 nor the two cytoskeleton inhibitors, colchicine and cyto-chalasin B, had any effect on water stress-induced ABA accumulation. Interestingly water stress-induced ABA accumulation was effectively inhibited by a non-plasmalemma-perme- able sulfhy-dryl-modifier PCMBS (p-chloromercuriphenyl-sulfonic acid), suggesting that plasmalemma pro-tein(s) may be involved in the triggering of water stress-induced ABA accumulation, and the protein may contain sulfhydryl group at its function domain.展开更多
基金funded by the Major National Science and Technology Project(2016ZX05033)SINOPEC Science&Technology R&D Department's project(P21043-3)and basic research project(P22214-2 and P22214-1).
文摘The East Coast of Canada presents multiple passive continental margin basins(PCMBs)characterized by significant architectural differences and limited oil and gas discoveries,establishing these basins as the global frontier for hydrocarbon exploration.Limited understanding of the characteristics of basin ar-chitectures and their control of hydrocarbon accumulation hinders exploration breakthroughs in these basins.Using magnetic anomaly,seismic,and drilling data,this study conducts integrated geological and geophysical interpretations of the PCMBs.Accordingly,this study reveals that the PCMBs have undergone three evolutionary stages,namely rifting(comprising three episodes),depression,and continental margin,with the synthem of each stage being referred to as rift layer,depression layer,and continental margin layer,respectively.Under the control of transform faults and basement nature,four distinct types of PCMBs have formed:transtensional,transform,gentle-rampy,and volcanic rifted types from south to north.The basins with varying architectures govern the sedimentary filling,the combination of petro-leum system elements,and differential hydrocarbon accumulation across three major types of synthems.Furthermore,this study highlights substantial hydrocarbon exploration potentials in the turbidite sandstones within the slope and basin-floor areas of the transtensional and transform types of PCMBs,as well as in the deltaic sandstones within the rift and depression layers of the gentle-rampy type of PCMBs.
基金the National Natural Science Foundation of China (Grant Nos. 39730340 & 30070071 and the National Key Basic Research Project (Grant No. G1999011700).
文摘Water stress-induced ABA accumulation is a cellular signaling process from water stress perception to activation of genes encoding key enzymes of ABA biosynthesis, of which the water stress-signal perception by cells or triggering mechanism of the ABA accumulation is the center in the whole process of ABA related-stress signaling in plants. The cell biological mechanism for triggering of ABA accumulation under water stress was studied in leaves of Vicia faba. Mannitol at 890 mmol· kg-1 osmotic concentration induced an increase of more than 5 times in ABA concentra-tion in detached leaf tissues, but the same concentration of mannitol only induced an increase of less than 40 % in ABA concentration in protoplasts. Like in detached leaf tissues, ABA concentra-tion in isolated cells increased more than 10 times under the treatment of mannitol at 890 mmol·kg-1 concentration, suggesting that the interaction between plasmalemma and cell wall was essential to triggering of the water stress-induced ABA accumulation. Neither Ca2+-che- lating agent EGTA nor Ca2+ channel activator A23187 nor the two cytoskeleton inhibitors, colchicine and cyto-chalasin B, had any effect on water stress-induced ABA accumulation. Interestingly water stress-induced ABA accumulation was effectively inhibited by a non-plasmalemma-perme- able sulfhy-dryl-modifier PCMBS (p-chloromercuriphenyl-sulfonic acid), suggesting that plasmalemma pro-tein(s) may be involved in the triggering of water stress-induced ABA accumulation, and the protein may contain sulfhydryl group at its function domain.
