**Acknowledgements**

We wish to acknowledge the contributions of Dr. Isah C. Lekmang, Ayuba D. Mangs and Mrs. Rhoda A. Gusikit of the Geology Department, University of Jos, Nigeria for being part the field mapping project. We wish to appreciate the contributions of Mr. Philip Dakwo, Hitler F. Boholmi and Joshua Bal during the field geophysics and hydrogeochemical sampling phases of the entire project.

*Progress in Volcanology*
