National Assessment of Oil and Gas Project - Michigan Basin Province (063) Boundary

The USGS Central Region Energy Team assesses oil and gas resources of the United States. The onshore and State water areas of the United States comprise 71 provinces. Within these provinces, Total Petroleum Systems are defined and Assessment Units are defined and assessed. Each of these provinces is defined geologically, and most province boundaries are defined by major geologic changes. The Michigan Basin Province is located in all of Michigan, except for a small portion of the Upper Penninsula, eastern Wisconsin, northeastern Illinois, northern Indiana, and northwestern Ohio. The main population centers within the study area are Detroit, Grand Rapids, Lansing and Flint, Michigan; Milwakee, Wisconsin; Chicago, Illinois; Fort Wayne, Indiana; and Toledo, Ohio. Numerous Interstate highways traverse the province from north to south and east to west. The province boundary was drawn to include the geologic structures generally considered to be in or bounding the Michigan Basin.

美国地质调查局（United States Geological Survey, USGS）中部地区能源团队负责评估美国境内的油气资源。美国本土陆地及各州管辖水域共计划分为71个油气省。在上述油气省范围内，需划定总石油系统（Total Petroleum Systems）并定义评估单元（Assessment Units），随后开展资源评估工作。各油气省均以地质特征为依据划定，绝大多数省界以重大地质转变作为划分依据。密歇根盆地省覆盖密歇根州全域，仅剔除上半岛的一小块区域，同时涵盖威斯康星州东部、伊利诺伊州东北部、印第安纳州北部以及俄亥俄州西北部。研究区内的主要人口中心包括密歇根州的底特律、大急流城、兰辛与弗林特；威斯康星州的密尔沃基；伊利诺伊州的芝加哥；印第安纳州的韦恩堡；以及俄亥俄州的托莱多。多条州际高速公路南北向、东西向贯穿该油气省。该省的边界划定原则为纳入通常被认为属于密歇根盆地或构成其边界的地质构造。