Bồn địa va chạm và địa chất sụt lún Late Proterozoic ở Đông Nam Trung Quốc: Bằng chứng địa chất

Springer Science and Business Media LLC - Tập 12 - Trang 239-251 - 1993
Zhou Xinmin1, Zhu Yunhe1
1Department of Earth Sciences, Nanjing University, Nanjing

Tóm tắt

Đới đứt gãy Jiangshan-Shaoxing (JSFB) là một địa sụt thuộc Late Proterozoic do sự va chạm giữa cung đảo và lục địa ở miền Nam Trung Quốc. Khối Cathaysian (CT), nằm ở phía đông nam JSFB, bao gồm các tổ hợp phiến xanh-amphibolit dưới dạng một loạt các tấm kiến tạo. Ở phía tây bắc của JSFB, nằm ở khu vực biên giới giữa các tỉnh Chiết Giang, Giang Tây và An Huy (viết tắt là ZJP-JXP-AHP), phân bố một bộ đá ôphiolit và các loại đá khác, cấu thành nên cung đảo cổ Jiangnan (JN) ở rìa đông nam của Khối Dương Tử (Y Z). Sự va chạm giữa JN và CT cách đây khoảng 0.9 Ga đã dẫn đến sự gấp khúc của JN, tiếp theo là sự xâm nhập (khoảng 0.9–0.8 Ga trước đây) của nhiều pluton diorit và ultramafic dọc theo đới đứt gãy. Kết quả là, khung kiến tạo cơ bản của kỷ tiền Cambri ở miền đông nam Trung Quốc đã được hình thành.

Từ khóa

#Đới đứt gãy Jiangshan-Shaoxing #Khối Cathaysian #Cung đảo cổ Jiangnan #Kiến tạo tiền Cambri #Đá ôphiolit

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