Qafor İ.¹, Javadova A.², Fanati R.³

¹ Yer və Neft Elmləri kafedrası, Elm fakültəsi, Süleymani Universiteti, İraq Kərkük küç., Sulaimanya 46002: imad.gafor@univsul.edu

² Micro Pro GmbH, Qommern, Almaniya Magdeburger küç. 26B, 39245: arzujavadova@yahoo.com, javadova@micropro.de

³ Qeologiya kafedrası, Elm və tədqiqat filialı, Azad İslam Universiteti, Tehran, İran Şöhəd Hesarak bul., Daneşgah meydanı, Səttari şossesi: roya_fanati@yahoo.com

DOI: 10.35714/ggistrat20250100011

Xülasə. Bu tədqiqat Baba Formasiyasının karbonat çöküntülərini və paleomühitini araşdırır və bunun üçün Zagros hövzəsinin şimal-şərqində, İraqda yerləşən Bai-Həsən neft quyusu-4 və Kərkük neft quyusu-19-dan götürülmüş nümunələrdən istifadə edilir. Ümumilikdə, Bai-Həsən neft quyusu-4-dən əlli, Kərkük neft quyusu-19-dan isə iyirmi nümunə toplanmışdır.

Baba Formasiyasının bu kəsimlərindəki iri foraminifer topluluqları yeddi əsas cinsə bölünmüşdür: Lepidocyclina, Miogypsina, Miogypsinoides, Amphistegina, Austrotrillina, Pararotalia və Nummulitidae, həmçinin Alveolinids, korallin yosunları və qabıq əmələ gətirən foraminiferlər. Nazik dilimlərin kəmiyyət analizi bu taksonların müxtəlif stratigrafik vahidlərdəki miqdarı və yayılması baxımından fərqləndiyini göstərmişdir.

Kərkük quyusu-19-da Lepidocyclina və qabıq əmələ gətirən foraminiferlər əsasən alt qatlarda çoxluq təşkil edirdi, halbuki Nummulitidae üst qatlarda daha çox yayılmışdır. Bunun əksinə olaraq, Bai-Həsən quyusu-4-də Lepidocyclina və Amphistegina daha bərabər paylanmış və yuxarı qatlarda qabıq əmələ gətirən foraminiferlərin lokal miqdar artımı müşahidə edilmişdir.

Tədqiqatın nəticələri göstərir ki, Baba Formasiyasının karbonat çökmə süxurları dörd fərqli mikrofasiya ilə təmsil olunur: 1) хırdadan çox iri ölçüyə qədər bioklastik iri foraminiferli pakston, greynstona keçid; 2) хırdadan çox iri ölçüyə qədər bioklastik iri foraminiferli pakston; 3) хırda bioklastik xırda foraminiferli pakston; 4) хırda bioklastik xırda foraminiferli vakston, dolomita keçid.

Baba Formasiyasının çökmə mühiti təcrid olunmuş yamac və ya platforma şəraitində formalaşmış, çökmə prosesi boyunca açıq dəniz şəraiti üstünlük təşkil etmişdir.

Açar sözlər: Baba Formasiyası, bentik foraminiferlər, mikrofasiyalar, paleoekologiya, Oliqosen, İrak

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