REFINING SYN-TECTONIC DIAGENETIC AND STRUCTURAL HISTORY OF THE ARBUCKLE MOUNTAINS

The Arbuckle Mountains (OK) consists of an inverted aulacogen uplifted during the Arbuckle Orogeny. This belt was affected by a long lasting and complicated tectonic history, and related fluid-flow. Based on stable and radiogenic isotope approaches, previous studies have attempted to document the diagenetic history of the Arbuckle Mountains. Whereas results from these studies suggest that the diagenetic history was structurally controlled by fault systems, the tectonic evolution of this massif is not fully resolved yet.

In order to document the different tectonic phases affecting the Arbuckle Mountain and their absolute timing, we conducted a detailed field-based structural analysis coupled to in-situ U-Pb analyses on fault related carbonate veins. In addition, we performed ∆47, O and C isotope analyses on carbonate veins and their host rock to document the diagenetic alteration related to each recorded tectonic event.

Our results demonstrate the Arbuckle Mountain anticline is affected by at least 3 distinct tectonic events: the main shortening event (D1) related to the Arbuckle Orogeny, a strike-slip event (D2), and extensional event (D3). Our preliminary data suggest that D1 event lasted until Permian. Finally, based on the integration of all our dataset, a tectonic-related diagenetic model will be discussed.