About this Research Topic
Remagnetizations caused by chemical alteration are common in sedimentary rocks. These remagnetizations or secondary chemical magnetizations can be used to constrain the timing of events such as fluid alteration (e.g., hydrothermal, hydrocarbons, weathering) and burial (e.g., clay diagenesis, maturation of organic matter) diagenetic processes. Determining the timing of such secondary magnetization is important because diagenetic studies are frequently limited by the difficulty in constraining the time frames in which most past events have occurred. In addition, remagnetizations can obscure or remove primary magnetizations that can be used in other studies (e.g., tectonic and paleogeographic reconstructions, apparent polar wander, true polar wander, and magnetostratigraphic). Diagenesis can also influence paleoenvironmental magnetic signatures recorded in the magnetic susceptibility and anisotropy of magnetic susceptibility measurements. It is therefore important to better understand how diagenetic processes can influence the magnetic signatures in sedimentary rocks.
In this Research Topic collection, we seek contributions that focus on identifying and assessing remagnetization and the alteration of the magnetic signatures caused by diagenetic processes at various scales and using different techniques. We are particularly interested in studies which focus on remagnetization in the rock record. Integrated studies which combine paleomagnetic, petrographic (thin sections, scanning electron microscope, etc.), rock magnetic, magnetic susceptibility, anisotropy of magnetic susceptibility, and geochemical data are encouraged. Comparisons with other dating techniques (e.g., K-Ar, etc.) are also needed in order to test the paleomagnetic dating approach. Recent studies indicate that shales can have a complex paragenesis, and integrated studies should provide information to better understand the processes that alter shales.
We welcome submissions within, but not limited to, the following themes:
• Dating diagenetic events using paleomagnetism;
• Case studies on the occurrence and origin of remagnetization as well as of rocks of different ages and tectonic settings;
• Studies of rock types which have not received as much attention until recently (e.g. shales) are encouraged;
• Remagnetization associated with specific fluid diagenetic processes such as alteration by hydrothermal, orogenic, mineralizing, hydrocarbons, weathering fluids, etc;
• Remagnetization caused by burial diagenetic processes such as clay diagenesis and maturation of organic matter;
• Remagnetization and orogenesis;
• Comparison of paleomagnetic dating with other techniques (e.g., K-Ar dating, etc.);
• Rock magnetic indicators of remagnetization and chemical alteration;
• Magnetic mineral diagenesis and paleointensity determinations;
• Diagenesis and alteration of the magnetic susceptibility and anisotropy of magnetic susceptibility; implications for paleoenvironmental magnetism;
• Diagenesis and remagnetization associated with asteroid impacts;
• Role of organic matter and hydrocarbons in causing magnetic alteration; and
• Clay mineral diagenesis and magnetic minerals.
In this Research Topic collection, we seek contributions that focus on identifying and assessing remagnetization and the alteration of the magnetic signatures caused by diagenetic processes at various scales and using different techniques. We are particularly interested in studies which focus on remagnetization in the rock record. Integrated studies which combine paleomagnetic, petrographic (thin sections, scanning electron microscope, etc.), rock magnetic, magnetic susceptibility, anisotropy of magnetic susceptibility, and geochemical data are encouraged. Comparisons with other dating techniques (e.g., K-Ar, etc.) are also needed in order to test the paleomagnetic dating approach. Recent studies indicate that shales can have a complex paragenesis, and integrated studies should provide information to better understand the processes that alter shales.
We welcome submissions within, but not limited to, the following themes:
• Dating diagenetic events using paleomagnetism;
• Case studies on the occurrence and origin of remagnetization as well as of rocks of different ages and tectonic settings;
• Studies of rock types which have not received as much attention until recently (e.g. shales) are encouraged;
• Remagnetization associated with specific fluid diagenetic processes such as alteration by hydrothermal, orogenic, mineralizing, hydrocarbons, weathering fluids, etc;
• Remagnetization caused by burial diagenetic processes such as clay diagenesis and maturation of organic matter;
• Remagnetization and orogenesis;
• Comparison of paleomagnetic dating with other techniques (e.g., K-Ar dating, etc.);
• Rock magnetic indicators of remagnetization and chemical alteration;
• Magnetic mineral diagenesis and paleointensity determinations;
• Diagenesis and alteration of the magnetic susceptibility and anisotropy of magnetic susceptibility; implications for paleoenvironmental magnetism;
• Diagenesis and remagnetization associated with asteroid impacts;
• Role of organic matter and hydrocarbons in causing magnetic alteration; and
• Clay mineral diagenesis and magnetic minerals.
Keywords: remagnetization, secondary magnetization, diagenesis, authigenic magnetic minerals
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.
