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  • 1
    Online-Ressource
    Online-Ressource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Schlagwort(e): Hydrogen -- Research. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (238 pages)
    Ausgabe: 1st ed.
    ISBN: 9783662457801
    Serie: Lecture Notes in Chemistry Series ; v.88
    Sprache: Englisch
    Anmerkung: Intro -- Preface -- Contents -- 1 Hydrogen Bonding-Controlled Photoinduced Electron and Energy Transfer -- Abstract -- 1.1 Introduction -- 1.2 Basic Theories for Photoinduced Electron and Energy Transfer -- 1.2.1 Photoinduced Electron Transfer (PET) Processes -- 1.2.2 Photoinduced Energy Transfer Processes -- 1.3 Hydrogen Bonding-Controlled Photoinduced Electron Transfer -- 1.3.1 Mechanistic Studies -- 1.3.2 Electron Transfer Based on Double and Triple Hydrogen Bonding -- 1.3.3 Photoinduced Electron Transfer Based on Quadruply and Multiple Hydrogen Bonding -- 1.3.4 Applications of Hydrogen Bonding-Based Photoinduced Electron Transfer -- 1.4 Hydrogen Bonding-Controlled Photoinduced Energy Transfer -- 1.4.1 Photoinduced Energy Transfer Based on Triple Hydrogen Bonding -- 1.4.2 Energy Transfer Based on Quadruply Hydrogen Bonding and Its Applications -- 1.5 Summary and Outlook -- Acknowledgments -- References -- 2 Hydrogen Bonding in Supramolecular Nanoporous Materials -- Abstract -- 2.1 Introduction -- 2.2 Supramolecular Hydrogen Bonded Nanoporous Frameworks -- 2.2.1 Two-dimensional Hydrogen Bonded Nanoporous Networks -- 2.2.2 Three-dimensional Hydrogen Bonded Molecular Nanoporous Networks -- 2.3 Hydrogen Bonding in Block Copolymers as Nanoporous Networks -- 2.4 Hydrogen Bonding in Liquid Crystals as Nanoporous Networks -- 2.5 Conclusions and Outlook -- Ackowledgement -- References -- 3 Hydrogen Bonding for the Self-assembly of Organogels and Hydrogels -- Abstract -- 3.1 Introduction -- 3.2 Type of Organogels and Hydrogels Relevant to Hydrogen Bonding -- 3.2.1 Amino Acid and Amide Based Gels -- 3.2.2 Urea-Based Gels -- 3.2.3 Sugar-Based Organogels -- 3.2.4 Two Component Gels Based on Amino Acid Interaction -- 3.2.5 Multiple Hydrogen Bonding Interactions in Organogels -- 3.3 The Adjustment of the Hydrogen Bonding. , 3.3.1 Hydrogen Bonding Tuned by the Alkane Chain -- 3.3.2 Gelation Tuned by the Number and Position of the Hydrogen Bonding Sites -- 3.3.3 Hydrogen Bonding Tuned by Anions -- 3.3.4 Hydrogen Bonding Gelation Tuned by Enzymes and Proteins -- 3.3.5 Hydrogen Bonding Tuned by Sonication -- 3.4 Conclusions and Outlook -- Acknowledgments -- References -- 4 Designing Charge-Assisted Hydrogen Bonded Supramolecular Gelators -- Abstract -- 4.1 Introduction -- 4.2 Designing LMWGs -- 4.2.1 Molecular Engineering Approach -- 4.2.2 Supramolecular Synthon Approach in the Context of Crystal Engineering -- 4.2.2.1 Secondary Ammonium Monocarboxylate (SAM) Synthon -- 4.2.2.2 Secondary Ammonium Dicarboxylate (SAD) Synthon -- 4.2.2.3 Primary Ammonium Monocarboxylate (PAM) Synthon -- 4.2.2.4 Primary Ammonium Dicarboxylate (PAD) Synthon -- 4.2.2.5 Diprimary Ammonium Monocarboxyate (DPAM) Synthon -- 4.2.2.6 Diprimary Ammonium Dicarboxylate (DPAD) Synthon -- 4.2.2.7 Organic Salt-Based Supramolecular Synthons Versus Gelation -- 4.3 Conclusion -- Acknowledgments -- References -- 5 Hydrogen Bonding for Supramolecular Liquid Crystals -- Abstract -- 5.1 Introduction -- 5.2 Supramolecular Rodlike LCs -- 5.3 Supramolecular Columnar LCs from Hydrogen Bonded Discotic or Non-discotic Complex -- 5.3.1 Supramolecular Columnar LCs Containing Close-Type Hydrogen Bonds -- 5.3.2 One or Two-Dimensional Open-Type Assembly -- 5.3.3 Columnar Phase from Hydrogen Bonded Non-discotic Shape -- 5.4 Nonconventional Liquid Crystal with Open-Type Network of Hydrogen Bonds -- 5.4.1 Polyhydroxy Amphiphiles -- 5.4.2 Star-Shaped Block Molecules -- 5.4.3 Bolaamphiphiles -- 5.4.4 Imidazolium-Based Rodlike Ionic Liquid Crystals -- 5.4.5 Complicated 3D Cubic Phases from Triazol-Based Triblock Polyphiles and 2-Thienyl-4,6-diamino-1,3,5-triazines -- 5.4.5.1 Triazol-Based Triblock Polyphiles. , 5.4.5.2 2-Thienyl-4,6-diamino-1,3,5-triazines -- 5.5 Summary and Conclusion -- References -- 6 Hydrogen Bonding for Molecular, Macromolecular, and Supramolecular Materials -- Abstract -- 6.1 Introduction -- 6.2 Molecular Conformational Switching -- 6.3 Self-Healing Organic Materials -- 6.4 Artificial Antenna and Photosynthetic Systems -- 6.5 Dye-Sensitized Solar Cells -- 6.6 Organic Photovoltaic Materials -- 6.7 Organic Light-Emitting Diodes -- 6.8 Organic Field-Effect Transistor -- 6.9 Conclusion and Perspectives -- References.
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  • 2
    Online-Ressource
    Online-Ressource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Schlagwort(e): Hydrogen bonding. ; Electronic books.
    Materialart: Online-Ressource
    Seiten: 1 online resource (357 pages)
    Ausgabe: 1st ed.
    ISBN: 9783662457566
    Serie: Lecture Notes in Chemistry Series ; v.87
    Sprache: Englisch
    Anmerkung: Intro -- Preface -- Contents -- 1 Hydrogen Bonding Motifs: New Progresses -- Abstract -- 1.1 Hydrogen Bonding: The Basic Aspects -- 1.1.1 Definition -- 1.1.2 Hydrogen Bonding Donors and Acceptors -- 1.1.3 The Strength of the Hydrogen Bond -- 1.1.4 Hydrogen Bonding Formed by a Single Functional Group -- 1.2 Intramolecular Hydrogen Bonding -- 1.2.1 The O--H00B700B700B7X Hydrogen Bonding -- 1.2.2 The N--H00B700B700B7X Hydrogen Bonding -- 1.3 Intermolecular Hydrogen Bonding -- 1.3.1 Double Hydrogen Bonding -- 1.3.2 Triple Hydrogen Bonding -- 1.3.3 Quadruple Hydrogen Bonding -- 1.4 Conclusion -- Acknowledgments -- References -- 2 Understanding of Noncovalent Interactions Involving Organic Fluorine -- Abstract -- 2.1 Introduction -- 2.1.1 Why Fluorine Is So Special? -- 2.2 Debate on Participation of Fluorine as a Hydrogen Bond Donor: Overview of the Weak X--H00B700B700B7F--C -- X = N, O, C Hydrogen Bond -- 2.3 Inputs from Other Interactions Involving Organic Fluorine -- 2.3.1 Insight into Halogen--Halogen Interactions Involving Fluorine -- 2.3.2 Insights into Halogen Bond Formation Involving Fluorine (C--F00B700B700B7X -- X = Halogen, N, O, S) -- 2.4 Conclusions -- Acknowledgments -- References -- 3 Hydrogen Bonding in Supramolecular Crystal Engineering -- Abstract -- 3.1 Introduction -- 3.2 Crystal Engineering Strategies -- 3.2.1 Supramolecular Synthons and Retrosynthesis -- 3.2.2 Reticular Synthesis -- 3.3 Hydrogen Bonding -- 3.3.1 Definition and Scopes -- 3.3.2 Description of Hydrogen Bonding Motifs: The Graph Sets -- 3.3.3 Hydrogen Bonding Rules -- 3.4 Interpenetration -- 3.5 Hydrogen Bonding Structures -- 3.5.1 Discrete Hydrogen Bonding Capsules -- 3.5.1.1 Dimeric Capsules -- 3.5.1.2 Hexameric Capsules -- 3.5.1.3 A Quasi-truncated Octahedron -- 3.5.2 1D Infinite Hydrogen Bonding Nanotubes -- 3.5.2.1 Tubes Constructed from Flat Macrocycles. , 3.5.2.2 Tubes Constructed from Calixarenes -- 3.5.2.3 Tubes Constructed from Acyclic Molecules -- 3.5.3 2D and 3D Borromean Arrayed Organic Crystals -- 3.5.4 2D 2192 3D Parallel Polycatenated Structures -- 3.5.5 3D Interpenetrated dia and pcu Frameworks -- 3.5.6 Unusual Aggregation Phase of Water Molecules -- 3.6 Applications -- 3.6.1 Crystal Engineering of Solid State Photochemical Reactions -- 3.6.1.1 Self-complementary Reactants -- 3.6.1.2 Auxiliary Templates -- 3.6.1.3 Confined Environments of Cavities -- 3.6.2 Gas Adsorption and Separation -- 3.6.3 Crystal Engineering of Pharmaceutical Cocrystals -- References -- 4 Hydrogen Bonding-Mediated Self-assembly of Aromatic Supramolecular Duplexes -- Abstract -- 4.1 Introduction -- 4.2 Oligoamide-Based Molecular Duplex Strands -- 4.2.1 Oligoamide-Based Molecular Duplex Strands -- 4.2.2 Applications -- 4.3 Oligohydrazide-Based Molecular Duplex Strands -- 4.3.1 From Supramolecular Zipper to Quadruple Hydrogen-Bonded Heterodimer -- 4.3.2 Strict Self-complementary Oligohydrazide-Based Duplexes -- 4.3.3 Shuttle Movement -- 4.3.4 Mutual Responsive Low Molecular Mass Organic Gelators -- 4.3.5 Supramolecular Substitution -- 4.3.6 Amide-Urea-Based Molecular Duplexes -- 4.3.7 ``Hao'' Templated Molecular Duplex -- 4.4 ``Covalent Casting'' Strategy-Based Molecular Duplexes -- 4.5 Other Molecular Duplex Strands -- 4.6 Conclusions and Outlook -- References -- 5 Hydrogen Bonding-Driven Anion Recognition -- Abstract -- 5.1 Introduction -- 5.2 Amide-Based Anion Recognition -- 5.3 Urea-Based Anion Recognition -- 5.4 Pyrrole-Based Anion Recognition -- 5.5 CH Donor-Based Anion Recognition -- 5.6 OH-Based Anion Recognition -- 5.7 Conclusion -- References -- 6 Formation of Hydrogen-Bonded Self-assembled Structures in Polar Solvents -- Abstract -- 6.1 Introduction -- 6.2 Nucleobase Pairing and Nanostructure Formation in Water. , 6.3 Self-sorting/Orthogonal Self-assembly -- 6.4 Supramolecular Polymers -- 6.5 Supramolecular Gels in Aqueous and Polar Organic Media -- 6.6 Vesicles, Bilayers, Micelles Through H-Bonding -- References -- 7 Hydrogen Bonded Capsules: Chemistry in Small Spaces -- Abstract -- 7.1 Why Study Encapsulated Molecules? -- 7.2 The Capsules and Their Contents -- 7.2.1 The Tennis Ball -- 7.2.2 The Softball -- 7.2.3 A Cylindrical Capsule -- 7.2.4 The Volleyball -- 7.3 What's It Like Inside the Capsules? -- 7.4 How Do Molecules Get In and Out of the Capsules? -- 7.5 Amplified Intermolecular Forces -- 7.6 Arrangements in Encapsulation Space: New Stereochemistry -- 7.6.1 Social Isomers -- 7.6.2 Single Molecule Solvation -- 7.6.3 Isotope Effects -- 7.6.4 Constellations -- 7.6.5 Diastereomers -- 7.7 Chiral Spaces -- 7.8 Reactivity -- 7.9 Conclusion -- Acknowledgments -- References -- 8 Hydrogen Bonded Organic Nanotubes -- Abstract -- 8.1 Introduction -- 8.2 Strategies for the Construction of Hydrogen Bonding-Driven Organic Nanotubes -- 8.3 Nanotubes from Hydrogen Bonding-Induced Helical Structures -- 8.4 Nanotubes from Tubular Molecules -- 8.5 Nanotubes from Hydrogen Bonded Rod-like Molecular Units -- 8.6 Nanotubes from Hydrogen Bonded Cyclic Molecules -- 8.6.1 Nanotubes from Hydrogen Bonded Cyclic Peptides -- 8.6.2 Nanotubes from Hydrogen Bonded Cyclic Ureas -- 8.7 Nanotubes from Hydrogen Bonded Wedge- or Sector-like Molecules -- 8.8 Conclusions and Outlooks -- References -- 9 H-Bonding-Assisted One-Pot Macrocyclization for Rapid Construction of H-Bonded Macrocyclic Aromatic Foldamers -- Abstract -- 9.1 Introduction -- 9.2 Concept Formulation -- 9.3 Aryl Amide Macrocycles -- 9.3.1 Non-fivefold Symmetric Aryl Amide Macrocycles -- 9.3.2 Fivefold Symmetric Aryl Amide Macrocycles -- 9.3.2.1 Evolution of Fivefold Symmetric Macrocycles. , 9.3.2.2 Fivefold Symmetric Macrocyclic Alkoxybenzene Pentamers -- 9.3.2.3 Fivefold Symmetric Macrocyclic Pyridone Pentamers -- 9.3.3 Highly Selective Production of Strained Aromatic Hexamers -- 9.3.4 Chemo- and Regio-Selective Demethylations -- 9.4 Macrocycles Containing Non-amide Linkages -- 9.5 Mechanism of One-Pot Macrocyclization -- 9.5.1 Variable Functionalizations Around the Pentameric Periphery -- 9.5.2 A Chain-Growth Mechanism Underlying the Formation of Aromatic Pentamers -- 9.5.3 A Non-chain Growth Mechanism Underlying the Formation of Strained Aromatic Hexamers and Heptamers -- 9.6 Conclusion -- References -- 10 Hydrogen-Bonded Supramolecular Polymers -- Abstract -- 10.1 Introduction -- 10.2 Hydrogen-Bonding Building Blocks -- 10.3 Hydrogen-Bonded Main-Chain Supramolecular Polymers Constructed by Low-Molecular-Weight Monomers -- 10.4 Hydrogen-Bonded Supramolecular Polymers Constructed by High-Molecular-Weight Conventional Polymers that Are Functionalized by Hydrogen-Bonded Motifs -- 10.4.1 Telechelic Supramolecular Polymers -- 10.4.2 ``Side-Chain'' Supramolecular Polymer Networks -- 10.5 Supramolecular Polymers Constructed by Orthogonal Hydrogen Bonding-Driven Self-assembly and Other Non-covalent Interactions -- 10.6 Conclusions -- References.
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  • 3
    Digitale Medien
    Digitale Medien
    s.l. : American Chemical Society
    The @journal of organic chemistry 58 (1993), S. 2599-2604 
    ISSN: 1520-6904
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Scandinavian journal of immunology 43 (1996), S. 0 
    ISSN: 1365-3083
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The clonotypic T-cell antigen receptor (TCR)-β chain contains two extracellular intrachain disulfide bonds. It belongs to the immunoglobulin gene superfamily and is subdivided into variable (V), joining (J), diversity (D) and constant (C) region. Monoclonal antibody (MoAb) KJ25 is believed to recognize an epitope in the V-domain of TCR-β (Vβ3) chain, but its epitope requirements are unknown. In this study of TCR-αβ chain interactions using chimeric recombinant TCR-β chains, the authors found that partial substitution of the Cβ-domain with that of interleukin-2 receptor α chain (Tac) sequences led to the loss of TCR-Vβ3 epitope recognition by KJ25. These results suggest that epitope recognition of the TCR-Vβ3 by KJ25 MoAb is dependent not only on the V-domain, but also on the close contact with the extracellular C-domain which influences the conformation and epitope recognition of the Vβ3-region. This may not be unique to Vβ3 and may be a general feature of TCR-β protein folding.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 426 (2003), S. 516-516 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The earliest four-limbed vertebrates, or tetrapods, lived between 370 million and 354 million years ago, during the Late Devonian period, and typically had more than five digits (polydactyly). We have discovered that a preaxial form of polydactyly, in which extra digits are positioned anterior ...
    Materialart: Digitale Medien
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  • 6
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 2 (1996), S. 624-633 
    ISSN: 0947-6539
    Schlagwort(e): catenanes ; macrocycles ; rotaxanes ; self-assembly ; tetrathiafulvalenes ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A general stepwise approach is described for the preparation of tetrathiafulvalene (TTF)-based linear and monoand dimacrocyclic compounds incorporating one or two 1,4-dioxyphenylene, 9,10-dioxyanthrylene, or 1,5- or 2,6-dioxynaphthylene units from readily available starting materials. By utilizing the π-π stacking interactions of the TTF unit with the dipyridinium dication of 1,1′-[1,4-phenylenebis (methylene)] bis-4,4′-bipyridinium bis(hexafluorophosphate), a rotaxane and two [2]catenanes were synthesized starting from the linear and monomacrocyclic compounds, respectively. From the dioxyphenylene-based dimacrocycle, three [3]pseudocatenanes (trans, cis, and a mixture of cis/trans isomers) were obtained with the trans compound as the major product. From the dioxyanthrylene dimacrocycle, only the trans-[3]pseudocatenane was obtained. Catenane products were formed quantitatively from the 1,5-dioxynaphthylene dimacrocycle in a template-directed reaction, affording a trans-[3]pseudo-catenane together with a [4]pseudocatenane (mixture of cis/trans isomers). From the 2,6-dioxynaphthylene dimacrocycle, a cis-[3]pseudocatenane was obtained as the major product and a trans-[3]pseudocatenane as the minor one. For the [3]pseudocatenanes (i.e., both the cis and trans catenanes), in which the TTF units were clamped by the tetracationic macrocycle, isomerizations were completely prevented even in the presence of trifluoroacetic acid. All new rotaxanes and catenanes were characterized by electrospray mass spectrometry, and the cis- and trans- [3]pseudocatenanes were additionally investigated by 1H NMR spectroscopy. The electrochemical and spectral properties of the rotaxane and the catenanes are reported. Catenane formation increases the redox potentials of the TTF unit. The results demonstrate the versatility of TTF as a building block in the construction of supramolecular structures.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
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  • 7
    ISSN: 0044-8249
    Schlagwort(e): Catenane ; Kronenether ; Selbstorganisation ; Tetrathiafulvalene ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
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  • 8
    ISSN: 0570-0833
    Schlagwort(e): catenanes ; crown ethers ; self-assembly ; tetrathiafulvalenes ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
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  • 9
    facet.materialart.
    Unbekannt
    Taylor & Francis
    In:  Journal of Asian Natural Products Research, 14 (7). pp. 647-651.
    Publikationsdatum: 2018-01-24
    Beschreibung: Three new compounds, 4′-(4,5-dimethyl-1,3-dioxolan-2-yl)methyl-phenol (1), (3′-hydroxybutan-2′-yl)5-oxopyrrolidine-2-carboxylate (2), and atroviridetide (3), have been isolated from the marine-derived fungus Trichoderma atroviride G 20-12. Their structures were determined on the basis of chemical and spectroscopic methods.
    Materialart: Article , PeerReviewed
    Format: text
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  • 10
    Publikationsdatum: 2012-01-01
    Beschreibung: The Yangzhaiyu gold deposit is one of numerous lode gold deposits in the Xiaoqinling district, southern margin of the North China Craton. Gold mineralization is hosted in Neoarchean to early Paleoproterozoic amphibolite facies metamorphic rocks and consists of auriferous quartz veins and subordinate disseminated ores in the vein-proximal alteration zone. Ore-related hydrothermal alteration is dominated by sericite + quartz + sulfide assemblages close to gold veins, and biotite + quartz + pyrite ± chlorite ± epidote alteration generally distal from mineralization. Pyrite is the predominant sulfide mineral, locally coexisting with minor amounts of chalcopyrite, sphalerite, and galena. Gold occurs mostly as free gold enclosed in or filling microfractures of pyrite and quartz and is also present in equilibrium with Au-bearing tellurides, mainly petzite and calaverite coexisting with hessite, tellurobismuthite, and altaite.Fluid inclusion studies suggest that gold veins were deposited at intermediate temperatures (175°–313°C) from aqueous or aqueous-carbonic fluids with moderate salinity (5–14 wt % NaCl equiv). d34S values of sulfide minerals range mainly from 2.0 to 4.4‰, whereas auriferous quartz vein samples have d18O values of 12.4 to 9.6‰, with calculated d18OH2O values of 6.0 to 3.2‰. Gold-related pyrite grains yield elevated 3He/4He ratios (1.51-0.32 Ra) relative to crustal reservoirs and mantle-like 20Ne/22Ne and 21Ne/22Ne ratios (9.90-9.68 and 0.029, respectively). The stable and noble gas isotopes thus suggest deep-seated, most likely magmatic and mantle-derived, sources for the ore fluids, sulfur and, by inference, other components in the ore system.40Ar/39Ar dating of ore-related sericite and biotite separates indicates two episodes of gold genesis at 134.5 to 132.3 and 124.3 to 123.7 Ma. The mineralization ages overlap zircon U-Pb ages of 141.0 ± 1.6 to 125.8 ± 1.4 Ma (2s) for the Wenyu and Niangniangshan monzogranite Plutons and a number of mafic to intermediate dikes intruding these Plutons, all being proximal to the Yangzhaiyu gold deposit. The synchronism of gold genesis and magmatism provides additional weights of evidence for a magmatic derivation of ore fluids and sulfur. The geochronologic data also suggest that gold veining took place billions of years after the stabilization of the North China Craton and associated metamorphism in the Late Archean to early Paleoproterozoic. This contrasts sharply to lode gold deposits in other Precambrian cratons that formed predominantly in Late Archean to Paleoproterozoic, temporarily and genetically related to regional high-grade metamorphism and compressional or transpressional tectonism.Available data have demonstrated that the North China Craton was reactivated in the late Mesozoic, as marked by voluminous igneous rocks, faulted-basin formation, high crustal heat flow, and widespread metamorphic core complexes in the eastern part of the craton. It is thus suggested that the Yangzhaiyu gold deposit, together with other deposits of similar ages in the Xiaoqinling district, were products of this craton reactivation event. Lithospheric extension and extensive magmatism related to the craton reactivation may have provided sufficient heat energy, fluid, and sulfur required for the formation of the gold deposits.
    Print ISSN: 0361-0128
    Thema: Geologie und Paläontologie
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