Search Results - "Helga De Wall"

Neoproterozoic geodynamics in NW India - evidence from Erinpura granites in the South Delhi Fold Belt by De Wall, Helga, Regelous, Anette, Schulz, Bernhard, Hahn, Gregor, Bestmann, Michel, Sharma, Kamal Kant

“…Erinpura Granites form the basement for the Neoproterozoic Malani Igneous Suite in NW India. Based on this study, the Erinpura granites can be divided into…”
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Evolution and tectonic setting of the Malani – Nagarparkar Igneous Suite: A Neoproterozoic Silicic-dominated Large Igneous Province in NW India-SE Pakistan by de Wall, Helga, Pandit, Manoj K., Donhauser, Ines, Schöbel, Stefan, Wang, Wei, Sharma, Kamal K.

“…•Volcano-magmatic provinces in NW India and SE Pakistan share a common evolutionary history.•They represent a Neoproterozoic Silicic-dominated Large Igneous…”
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Origin of S-, A- and I-Type Granites: Petrogenetic Evidence from Whole Rock Th/U Ratio Variations by Anette Regelous, Lars Scharfenberg, Helga De Wall

“…The origin and evolution of granites remain a matter of debate and several approaches have been made to distinguish between different granite types. Overall,…”
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Monazite CHIME/EPMA dating of Erinpura granitoid deformation: Implications for Neoproterozoic tectono-thermal evolution of NW India by Just, Jana, Schulz, Bernhard, de Wall, Helga, Jourdan, Fred, Pandit, Manoj K.

“…The in-situ “chemical” Th–U–Pb dating of monazite with the electron microprobe is used to unravel the Neoproterozoic tectono-thermal history of the “Erinpura…”
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Deformation and granite intrusion in the Sirohi area, SW Rajasthan—Constraints on Cryogenian to Pan-African crustal dynamics of NW India by de Wall, Helga, Pandit, Manoj K., Sharma, Kamal K., Schöbel, Stefan, Just, Jana

“…•Thrusting and folding in the Sirohi region, NW India.•Deformation is cryogenian in age.•Linkage to late-Neoproterozoic sutures and shear zones in…”
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Cryogenian transpression and granite intrusion along the western margin of Rodinia (Mt. Abu region): Magnetic fabric and geochemical inferences on Neoproterozoic geodynamics of the NW Indian block by de Wall, Helga, Pandit, Manoj K., Dotzler, Ramona, Just, Jana

“…The Mt. Abu batholith in NW India comprises variably deformed porphyritic, granophyric to medium-grained granites and granite gneisses. They are intruded by…”
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AMS in basalts: is there a need for prior demagnetization? by Schöbel, Stefan, Wall, Helga de, Rolf, Christian

“…One of the most prominent applications of anisotropy of magnetic susceptibility (AMS) measurements is the evaluation of flow fabrics in basalts. Basalts often…”
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Continental rift-setting and evolution of Neoproterozoic Sindreth Basin in NW-India by Schöbel, Stefan, Sharma, Kamal K, Hörbrand, Thorsten, Böhm, Theresa, Donhauser, Ines, de Wall, Helga

“…The Neoproterozoic Sindreth Basin, NW India, and its surrounding area represent a half graben structure situated between the undeformed Malani Igneous Suite…”
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In situ gamma radiation measurements in the Neoproterozoic rocks of Sirohi region, NW India by Scharfenberg, Lars, Wall, Helga De, Schöbel, Stefan, Minor, Alexander, Maurer, Marcel, Pandit, Manoj K, Sharma, Kamal K

“…Natural gamma ray measurements using a portable device were performed at 157 sites in the area around Sirohi town and Sindreth village in Rajasthan (NW India)…”
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Post-collisional shortening in the late Pan-African Hamisana high strain zone, SE Egypt: field and magnetic fabric evidence by de Wall, Helga, Greiling, Reinhard O., Fouad Sadek, Mohamed

“…The Hamisana zone (HZ) is one of the major high strain zones of the Pan-African (Neoproterozoic) Arabian–Nubian shield (ANS). It trends broadly N–S from…”
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Tonian evolution of an active continental margin - a model for Neoproterozoic NW India-SE Pakistan–E Oman linkage by de Wall, Helga, Regelous, Anette, Tomaschek, Frank, Bestmann, Michel, Hahn, Gregor, Sharma, Kamal Kant

“…[Display omitted] •Transition from stable (S-type granites, - εNd) into stretched continental margin(I-type granitoids, + εNd)•Linkage of NW India, Seychelles,…”
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Subsurface granites in the Franconian Basin as the source of enhanced geothermal gradients: a key study from gravity and thermal modeling of the Bayreuth Granite by de Wall, Helga, Schaarschmidt, Anna, Kämmlein, Marion, Gabriel, Gerald, Bestmann, Michel, Scharfenberg, Lars

“…The Franconian Basin in NE Bavaria is a region of gravity low between the Bohemian Massif in the east and the Kraichgau Terrane in the west. Borehole…”
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Magnetostratigraphy and 40Ar–39Ar geochronology of the Malwa Plateau region (Northern Deccan Traps), central western India: Significance and correlation with the main Deccan Large Igneous Province sequences by Schöbel, Stefan, de Wall, Helga, Ganerød, Morgan, Pandit, Manoj K., Rolf, Christian

“…•Magnetostratigraphic and geochronology study of the Northern Deccan LIP.•The Northern Deccan Province erupted during the magnetochrons C30n and C29r.•Northern…”
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Upper crustal fluids in a large fault system: microstructural, trace element and oxygen isotope study on multi-phase vein quartz at the Bavarian Pfahl, SE Germany by Schaarschmidt, Anna, Haase, Karsten M., de Wall, Helga, Bestmann, Michel, Krumm, Stefan, Regelous, Marcel

“…Fault systems are zones of crustal weakness and are used as pathways for ascending hydrothermal fluids. One impressive example is the more than 150 km long…”
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Paleosol occurrences along the Archean–Proterozoic contact in the Aravalli craton, NW India by de Wall, Helga, Pandit, Manoj K., Chauhan, Narendra K.

“…[Display omitted] ► Paleosols occur in the Aravalli craton along the Archean–Proterozoic interface. ► The weathering interval is defined as between ∼2.5Ga and…”
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Differences in natural gamma radiation characteristics of Erinpura and Malani granites in NW India by Scharfenberg, Lars, Jandausch, Sebastian, Anetzberger, Lina, Regelous, Anette, Sharma, Kamal K, De Wall, Helga

“…In NW India, large volumes of exposed Neoproterozoic basement rocks are formed by two magmatic suites, Erinpura granites as a late thermal event with respect…”
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Anthropogenic particle dispersions in topsoils of the Middle Nile Delta: a preliminary study on the contamination around industrial and commercial areas in Egypt by Abu Khatita, Atef M., de Wall, Helga, Koch, Roman

“…Increased industrialization has adversely affected various components of the environment including soil, which is the ultimate site of settling and…”
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Late to post-Variscan basement segmentation and differential exhumation along the SW Bohemian Massif, central Europe by Eberts, Andreas, Fazlikhani, Hamed, Bauer, Wolfgang, Stollhofen, Harald, de Wall, Helga, Gabriel, Gerald

“…The exposed Variscan basement in central Europe is well-known for its complex structural and lithological architecture resulting from multiple deformation…”
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Instantaneous healing of micro-fractures during coseismic slip: Evidence from microstructure and Ti in quartz geochemistry within an exhumed pseudotachylyte-bearing fault in tonalite by Bestmann, Michel, Pennacchioni, Giorgio, Mostefaoui, Smail, Göken, Mathias, de Wall, Helga

“…Exhumed faults within the tonalitic Adamello pluton (Southern Alps) were seismic at depth as indicated by the presence of pseudotachylytes (solidified…”
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Hybrid mafic dykes from Delwara Shear Zone, Mt. Abu, NW India by Pandit, Manoj K., Dotzler, Ramona, De Wall, Helga

“…Mafic dykes intrude the composite Mt. Abu granite batholith as a minor and the last phase of magmatism. The dykes are sub-vertical, variable in width and…”
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